Canadian Dollars
US Dollar
Euro
![Balboa VS520SZ Circuit Board 33-55151-K — Genuine Replacement Part
Get your hot tub back up and running with the genuine Balboa VS520SZ Circuit Board (part number 33-55151-K). Available new and in stock at Western Tub and Pool — your trusted source for hard-to-find spa repair parts.
[Shop and Order at Western Tub and Pool — Call 1-855-248-0777]
What Is the Balboa VS520SZ Circuit Board?
The Balboa VS520SZ Circuit Board (part number 33-55151-K) is a factory-new printed circuit board (PCB) designed to replace faulty or failed control boards in VS520SZ-based hot tub systems. Built by Balboa Water Group — one of the most trusted names in spa technology — this board restores full functionality to your spa control system quickly and reliably.
Whether your spa won't heat, won't power on, or is displaying error codes, a failed circuit board is often the culprit. The VS520SZ is a proven, industry-standard replacement that fits a wide range of hot tub brands and control packs.
Key Features and Specifications
Brand: Balboa Water Group
Model: VS520SZ
Primary Part Number: 33-55151-K
Condition: New (factory fresh — never installed)
Connection Type: Serial Standard, 8-Pin Phone Cable
Pump Support: Supports up to 3 pumps, or 2 pumps and a blower
Compatible Sensors: Balboa M7 Sensors
Warranty: Manufacturer's limited 1-year warranty
System Outputs (as configured):
240V Pump 1 (2-Speed)
240V Pump 2 (2-Speed)
240V Blower
120V Circulation Pump
120V Ozonator
12V Spa Light
120V AV / Stereo
240V 5.5kW Heater
Power Requirements:
240VAC, 60Hz, 40A
Class A GFCI-protected service required
Circuit breaker rating: 50A max
4-wire connection (hot, hot, neutral, ground)
Cross-Reference Part Numbers
This board is sold and referenced under several part numbers. If you've seen any of the following on your existing board or in your spa documentation, the 33-55151-K is your replacement:
55151-01
33-0033B-K
33-0033B
330033B
9710-116
59-138-1687
G1157
389276
VS520SZR
33-55151 (HydroQuip)
Associated Chip Numbers: VS520SZR1A, VS520SZR1B, INFI10R1A
Compatible Keypads: 53189, VL501S
Compatible Hot Tub Brands and Control Systems
The Balboa VS520SZ circuit board has been used across a wide range of hot tub brands and control packs, including:
Compatible Control Packs:
VS520SZ Series Control Packs
HydroQuip 6230B Series Control Packs
HydroQuip 4330B Series
HydroQuip 6330B Series
Hot Tub Brands Known to Use This Board:
Cal Spas
Coleman Hot Tubs
Clearwater Spas
Any spa originally manufactured with a Balboa VS520SZ control system
Not sure if this board fits your spa? Check the model ID label on top of your existing control system enclosure. The model number printed there is your most reliable confirmation. If you're still unsure, we're here to help — see the contact section below.
Frequently Asked Questions
How do I know if this circuit board is compatible with my hot tub?
The best way to confirm compatibility is to locate the model ID label on the top of your spa's control system enclosure. If it reads "VS520SZ," this is the correct replacement board. You can also cross-reference using any of the part numbers listed above. Still not sure? Call us at 1-855-248-0777 or email fixmytub@gmail.com — our team is happy to help you identify the right part.
Is this a new or refurbished circuit board?
This is a brand-new, factory-fresh circuit board. It has never been installed or used. Every board sold at Western Tub and Pool is genuine and backed by the manufacturer's limited 1-year warranty.
Can I install this board myself?
Circuit board replacement requires a working knowledge of spa electrical systems and proper tools. If you're not comfortable working with electrical components, we strongly recommend hiring a qualified spa technician to handle the installation. Incorrect installation or selection of an incompatible board voids the manufacturer's warranty.
What if I don't know my part number?
No problem. Send us an email at fixmytub@gmail.com with photos of your existing circuit board, along with your hot tub's make, model, and serial number. Our team will identify the correct board for you and confirm availability before you order.
Does this board support a circulation pump and ozonator?
Yes. The VS520SZ supports a 120V circulation pump and 120V ozonator, in addition to primary and secondary pumps, a blower, spa lighting, and a stereo system.
Are circuit boards returnable?
Circuit boards are generally non-returnable once purchased, as they cannot be resold as new once opened. This is why we strongly recommend confirming compatibility before ordering. Our team is always available to assist you in making the right selection.
Can't Find the Part You Need?
We specialize in hard-to-find hot tub and spa parts. If you've been searching for a specific circuit board or spa component without luck, Western Tub and Pool is here to help.
Email us: fixmytub@gmail.com — Send us your part number, or include photos of your existing board along with your spa's make, model, and serial number, and we'll track down the right part for you.
Call us: 1-855-248-0777 — Speak directly with a knowledgeable team member who can guide you through the identification and ordering process.
Shop and Order at Western Tub and Pool
Don't let a failed circuit board keep you out of your hot tub. The Balboa VS520SZ Circuit Board 33-55151-K is available now — new, genuine, and ready to ship.
[Call 1-855-248-0777 to Order] | [Email fixmytub@gmail.com for Assistance]](https://cdn11.bigcommerce.com/s-b7yzllubsu/images/stencil/1280x1280/products/4428/6683/33-55151-k__09574.1783199918.PNG?c=2 "Balboa VS520SZ Circuit Board 33-55151-K — Genuine Replacement Part
Get your hot tub back up and running with the genuine Balboa VS520SZ Circuit Board (part number 33-55151-K). Available new and in stock at Western Tub and Pool — your trusted source for hard-to-find spa repair parts.
[Shop and Order at Western Tub and Pool — Call 1-855-248-0777]
What Is the Balboa VS520SZ Circuit Board?
The Balboa VS520SZ Circuit Board (part number 33-55151-K) is a factory-new printed circuit board (PCB) designed to replace faulty or failed control boards in VS520SZ-based hot tub systems. Built by Balboa Water Group — one of the most trusted names in spa technology — this board restores full functionality to your spa control system quickly and reliably.
Whether your spa won't heat, won't power on, or is displaying error codes, a failed circuit board is often the culprit. The VS520SZ is a proven, industry-standard replacement that fits a wide range of hot tub brands and control packs.
Key Features and Specifications
Brand: Balboa Water Group
Model: VS520SZ
Primary Part Number: 33-55151-K
Condition: New (factory fresh — never installed)
Connection Type: Serial Standard, 8-Pin Phone Cable
Pump Support: Supports up to 3 pumps, or 2 pumps and a blower
Compatible Sensors: Balboa M7 Sensors
Warranty: Manufacturer's limited 1-year warranty
System Outputs (as configured):
240V Pump 1 (2-Speed)
240V Pump 2 (2-Speed)
240V Blower
120V Circulation Pump
120V Ozonator
12V Spa Light
120V AV / Stereo
240V 5.5kW Heater
Power Requirements:
240VAC, 60Hz, 40A
Class A GFCI-protected service required
Circuit breaker rating: 50A max
4-wire connection (hot, hot, neutral, ground)
Cross-Reference Part Numbers
This board is sold and referenced under several part numbers. If you've seen any of the following on your existing board or in your spa documentation, the 33-55151-K is your replacement:
55151-01
33-0033B-K
33-0033B
330033B
9710-116
59-138-1687
G1157
389276
VS520SZR
33-55151 (HydroQuip)
Associated Chip Numbers: VS520SZR1A, VS520SZR1B, INFI10R1A
Compatible Keypads: 53189, VL501S
Compatible Hot Tub Brands and Control Systems
The Balboa VS520SZ circuit board has been used across a wide range of hot tub brands and control packs, including:
Compatible Control Packs:
VS520SZ Series Control Packs
HydroQuip 6230B Series Control Packs
HydroQuip 4330B Series
HydroQuip 6330B Series
Hot Tub Brands Known to Use This Board:
Cal Spas
Coleman Hot Tubs
Clearwater Spas
Any spa originally manufactured with a Balboa VS520SZ control system
Not sure if this board fits your spa? Check the model ID label on top of your existing control system enclosure. The model number printed there is your most reliable confirmation. If you're still unsure, we're here to help — see the contact section below.
Frequently Asked Questions
How do I know if this circuit board is compatible with my hot tub?
The best way to confirm compatibility is to locate the model ID label on the top of your spa's control system enclosure. If it reads \"VS520SZ,\" this is the correct replacement board. You can also cross-reference using any of the part numbers listed above. Still not sure? Call us at 1-855-248-0777 or email fixmytub@gmail.com — our team is happy to help you identify the right part.
Is this a new or refurbished circuit board?
This is a brand-new, factory-fresh circuit board. It has never been installed or used. Every board sold at Western Tub and Pool is genuine and backed by the manufacturer's limited 1-year warranty.
Can I install this board myself?
Circuit board replacement requires a working knowledge of spa electrical systems and proper tools. If you're not comfortable working with electrical components, we strongly recommend hiring a qualified spa technician to handle the installation. Incorrect installation or selection of an incompatible board voids the manufacturer's warranty.
What if I don't know my part number?
No problem. Send us an email at fixmytub@gmail.com with photos of your existing circuit board, along with your hot tub's make, model, and serial number. Our team will identify the correct board for you and confirm availability before you order.
Does this board support a circulation pump and ozonator?
Yes. The VS520SZ supports a 120V circulation pump and 120V ozonator, in addition to primary and secondary pumps, a blower, spa lighting, and a stereo system.
Are circuit boards returnable?
Circuit boards are generally non-returnable once purchased, as they cannot be resold as new once opened. This is why we strongly recommend confirming compatibility before ordering. Our team is always available to assist you in making the right selection.
Can't Find the Part You Need?
We specialize in hard-to-find hot tub and spa parts. If you've been searching for a specific circuit board or spa component without luck, Western Tub and Pool is here to help.
Email us: fixmytub@gmail.com — Send us your part number, or include photos of your existing board along with your spa's make, model, and serial number, and we'll track down the right part for you.
Call us: 1-855-248-0777 — Speak directly with a knowledgeable team member who can guide you through the identification and ordering process.
Shop and Order at Western Tub and Pool
Don't let a failed circuit board keep you out of your hot tub. The Balboa VS520SZ Circuit Board 33-55151-K is available now — new, genuine, and ready to ship.
[Call 1-855-248-0777 to Order] | [Email fixmytub@gmail.com for Assistance]")
![Balboa VS520SZ Circuit Board 33-55151-K — Genuine Replacement Part
Get your hot tub back up and running with the genuine Balboa VS520SZ Circuit Board (part number 33-55151-K). Available new and in stock at Western Tub and Pool — your trusted source for hard-to-find spa repair parts.
[Shop and Order at Western Tub and Pool — Call 1-855-248-0777]
What Is the Balboa VS520SZ Circuit Board?
The Balboa VS520SZ Circuit Board (part number 33-55151-K) is a factory-new printed circuit board (PCB) designed to replace faulty or failed control boards in VS520SZ-based hot tub systems. Built by Balboa Water Group — one of the most trusted names in spa technology — this board restores full functionality to your spa control system quickly and reliably.
Whether your spa won't heat, won't power on, or is displaying error codes, a failed circuit board is often the culprit. The VS520SZ is a proven, industry-standard replacement that fits a wide range of hot tub brands and control packs.
Key Features and Specifications
Brand: Balboa Water Group
Model: VS520SZ
Primary Part Number: 33-55151-K
Condition: New (factory fresh — never installed)
Connection Type: Serial Standard, 8-Pin Phone Cable
Pump Support: Supports up to 3 pumps, or 2 pumps and a blower
Compatible Sensors: Balboa M7 Sensors
Warranty: Manufacturer's limited 1-year warranty
System Outputs (as configured):
240V Pump 1 (2-Speed)
240V Pump 2 (2-Speed)
240V Blower
120V Circulation Pump
120V Ozonator
12V Spa Light
120V AV / Stereo
240V 5.5kW Heater
Power Requirements:
240VAC, 60Hz, 40A
Class A GFCI-protected service required
Circuit breaker rating: 50A max
4-wire connection (hot, hot, neutral, ground)
Cross-Reference Part Numbers
This board is sold and referenced under several part numbers. If you've seen any of the following on your existing board or in your spa documentation, the 33-55151-K is your replacement:
55151-01
33-0033B-K
33-0033B
330033B
9710-116
59-138-1687
G1157
389276
VS520SZR
33-55151 (HydroQuip)
Associated Chip Numbers: VS520SZR1A, VS520SZR1B, INFI10R1A
Compatible Keypads: 53189, VL501S
Compatible Hot Tub Brands and Control Systems
The Balboa VS520SZ circuit board has been used across a wide range of hot tub brands and control packs, including:
Compatible Control Packs:
VS520SZ Series Control Packs
HydroQuip 6230B Series Control Packs
HydroQuip 4330B Series
HydroQuip 6330B Series
Hot Tub Brands Known to Use This Board:
Cal Spas
Coleman Hot Tubs
Clearwater Spas
Any spa originally manufactured with a Balboa VS520SZ control system
Not sure if this board fits your spa? Check the model ID label on top of your existing control system enclosure. The model number printed there is your most reliable confirmation. If you're still unsure, we're here to help — see the contact section below.
Frequently Asked Questions
How do I know if this circuit board is compatible with my hot tub?
The best way to confirm compatibility is to locate the model ID label on the top of your spa's control system enclosure. If it reads "VS520SZ," this is the correct replacement board. You can also cross-reference using any of the part numbers listed above. Still not sure? Call us at 1-855-248-0777 or email fixmytub@gmail.com — our team is happy to help you identify the right part.
Is this a new or refurbished circuit board?
This is a brand-new, factory-fresh circuit board. It has never been installed or used. Every board sold at Western Tub and Pool is genuine and backed by the manufacturer's limited 1-year warranty.
Can I install this board myself?
Circuit board replacement requires a working knowledge of spa electrical systems and proper tools. If you're not comfortable working with electrical components, we strongly recommend hiring a qualified spa technician to handle the installation. Incorrect installation or selection of an incompatible board voids the manufacturer's warranty.
What if I don't know my part number?
No problem. Send us an email at fixmytub@gmail.com with photos of your existing circuit board, along with your hot tub's make, model, and serial number. Our team will identify the correct board for you and confirm availability before you order.
Does this board support a circulation pump and ozonator?
Yes. The VS520SZ supports a 120V circulation pump and 120V ozonator, in addition to primary and secondary pumps, a blower, spa lighting, and a stereo system.
Are circuit boards returnable?
Circuit boards are generally non-returnable once purchased, as they cannot be resold as new once opened. This is why we strongly recommend confirming compatibility before ordering. Our team is always available to assist you in making the right selection.
Can't Find the Part You Need?
We specialize in hard-to-find hot tub and spa parts. If you've been searching for a specific circuit board or spa component without luck, Western Tub and Pool is here to help.
Email us: fixmytub@gmail.com — Send us your part number, or include photos of your existing board along with your spa's make, model, and serial number, and we'll track down the right part for you.
Call us: 1-855-248-0777 — Speak directly with a knowledgeable team member who can guide you through the identification and ordering process.
Shop and Order at Western Tub and Pool
Don't let a failed circuit board keep you out of your hot tub. The Balboa VS520SZ Circuit Board 33-55151-K is available now — new, genuine, and ready to ship.
[Call 1-855-248-0777 to Order] | [Email fixmytub@gmail.com for Assistance]](https://cdn11.bigcommerce.com/s-b7yzllubsu/images/stencil/100x100/products/4428/6683/33-55151-k__09574.1783199918.PNG?c=2 "Balboa VS520SZ Circuit Board 33-55151-K — Genuine Replacement Part
Get your hot tub back up and running with the genuine Balboa VS520SZ Circuit Board (part number 33-55151-K). Available new and in stock at Western Tub and Pool — your trusted source for hard-to-find spa repair parts.
[Shop and Order at Western Tub and Pool — Call 1-855-248-0777]
What Is the Balboa VS520SZ Circuit Board?
The Balboa VS520SZ Circuit Board (part number 33-55151-K) is a factory-new printed circuit board (PCB) designed to replace faulty or failed control boards in VS520SZ-based hot tub systems. Built by Balboa Water Group — one of the most trusted names in spa technology — this board restores full functionality to your spa control system quickly and reliably.
Whether your spa won't heat, won't power on, or is displaying error codes, a failed circuit board is often the culprit. The VS520SZ is a proven, industry-standard replacement that fits a wide range of hot tub brands and control packs.
Key Features and Specifications
Brand: Balboa Water Group
Model: VS520SZ
Primary Part Number: 33-55151-K
Condition: New (factory fresh — never installed)
Connection Type: Serial Standard, 8-Pin Phone Cable
Pump Support: Supports up to 3 pumps, or 2 pumps and a blower
Compatible Sensors: Balboa M7 Sensors
Warranty: Manufacturer's limited 1-year warranty
System Outputs (as configured):
240V Pump 1 (2-Speed)
240V Pump 2 (2-Speed)
240V Blower
120V Circulation Pump
120V Ozonator
12V Spa Light
120V AV / Stereo
240V 5.5kW Heater
Power Requirements:
240VAC, 60Hz, 40A
Class A GFCI-protected service required
Circuit breaker rating: 50A max
4-wire connection (hot, hot, neutral, ground)
Cross-Reference Part Numbers
This board is sold and referenced under several part numbers. If you've seen any of the following on your existing board or in your spa documentation, the 33-55151-K is your replacement:
55151-01
33-0033B-K
33-0033B
330033B
9710-116
59-138-1687
G1157
389276
VS520SZR
33-55151 (HydroQuip)
Associated Chip Numbers: VS520SZR1A, VS520SZR1B, INFI10R1A
Compatible Keypads: 53189, VL501S
Compatible Hot Tub Brands and Control Systems
The Balboa VS520SZ circuit board has been used across a wide range of hot tub brands and control packs, including:
Compatible Control Packs:
VS520SZ Series Control Packs
HydroQuip 6230B Series Control Packs
HydroQuip 4330B Series
HydroQuip 6330B Series
Hot Tub Brands Known to Use This Board:
Cal Spas
Coleman Hot Tubs
Clearwater Spas
Any spa originally manufactured with a Balboa VS520SZ control system
Not sure if this board fits your spa? Check the model ID label on top of your existing control system enclosure. The model number printed there is your most reliable confirmation. If you're still unsure, we're here to help — see the contact section below.
Frequently Asked Questions
How do I know if this circuit board is compatible with my hot tub?
The best way to confirm compatibility is to locate the model ID label on the top of your spa's control system enclosure. If it reads \"VS520SZ,\" this is the correct replacement board. You can also cross-reference using any of the part numbers listed above. Still not sure? Call us at 1-855-248-0777 or email fixmytub@gmail.com — our team is happy to help you identify the right part.
Is this a new or refurbished circuit board?
This is a brand-new, factory-fresh circuit board. It has never been installed or used. Every board sold at Western Tub and Pool is genuine and backed by the manufacturer's limited 1-year warranty.
Can I install this board myself?
Circuit board replacement requires a working knowledge of spa electrical systems and proper tools. If you're not comfortable working with electrical components, we strongly recommend hiring a qualified spa technician to handle the installation. Incorrect installation or selection of an incompatible board voids the manufacturer's warranty.
What if I don't know my part number?
No problem. Send us an email at fixmytub@gmail.com with photos of your existing circuit board, along with your hot tub's make, model, and serial number. Our team will identify the correct board for you and confirm availability before you order.
Does this board support a circulation pump and ozonator?
Yes. The VS520SZ supports a 120V circulation pump and 120V ozonator, in addition to primary and secondary pumps, a blower, spa lighting, and a stereo system.
Are circuit boards returnable?
Circuit boards are generally non-returnable once purchased, as they cannot be resold as new once opened. This is why we strongly recommend confirming compatibility before ordering. Our team is always available to assist you in making the right selection.
Can't Find the Part You Need?
We specialize in hard-to-find hot tub and spa parts. If you've been searching for a specific circuit board or spa component without luck, Western Tub and Pool is here to help.
Email us: fixmytub@gmail.com — Send us your part number, or include photos of your existing board along with your spa's make, model, and serial number, and we'll track down the right part for you.
Call us: 1-855-248-0777 — Speak directly with a knowledgeable team member who can guide you through the identification and ordering process.
Shop and Order at Western Tub and Pool
Don't let a failed circuit board keep you out of your hot tub. The Balboa VS520SZ Circuit Board 33-55151-K is available now — new, genuine, and ready to ship.
[Call 1-855-248-0777 to Order] | [Email fixmytub@gmail.com for Assistance]")
Product Description
Balboa VS520SZ Circuit Board 33-55151-K — Genuine Replacement Part
Get your hot tub back up and running with the genuine Balboa VS520SZ Circuit Board (part number 33-55151-K). Available new and in stock at Western Tub and Pool — your trusted source for hard-to-find spa repair parts.
[Shop and Order at Western Tub and Pool — Call 1-855-248-0777]
What Is the Balboa VS520SZ Circuit Board?
The Balboa VS520SZ Circuit Board (part number 33-55151-K) is a factory-new printed circuit board (PCB) designed to replace faulty or failed control boards in VS520SZ-based hot tub systems. Built by Balboa Water Group — one of the most trusted names in spa technology — this board restores full functionality to your spa control system quickly and reliably.
Whether your spa won't heat, won't power on, or is displaying error codes, a failed circuit board is often the culprit. The VS520SZ is a proven, industry-standard replacement that fits a wide range of hot tub brands and control packs.
Key Features and Specifications
- Brand: Balboa Water Group
- Model: VS520SZ
- Primary Part Number: 33-55151-K
- Condition: New (factory fresh — never installed)
- Connection Type: Serial Standard, 8-Pin Phone Cable
- Pump Support: Supports up to 3 pumps, or 2 pumps and a blower
- Compatible Sensors: Balboa M7 Sensors
- Warranty: Manufacturer's limited 1-year warranty
System Outputs (as configured):
- 240V Pump 1 (2-Speed)
- 240V Pump 2 (2-Speed)
- 240V Blower
- 120V Circulation Pump
- 120V Ozonator
- 12V Spa Light
- 120V AV / Stereo
- 240V 5.5kW Heater
Power Requirements:
- 240VAC, 60Hz, 40A
- Class A GFCI-protected service required
- Circuit breaker rating: 50A max
- 4-wire connection (hot, hot, neutral, ground)
Cross-Reference Part Numbers
This board is sold and referenced under several part numbers. If you've seen any of the following on your existing board or in your spa documentation, the 33-55151-K is your replacement:
- 55151-01
- 33-0033B-K
- 33-0033B
- 330033B
- 9710-116
- 59-138-1687
- G1157
- 389276
- VS520SZR
- 33-55151 (HydroQuip)
Associated Chip Numbers: VS520SZR1A, VS520SZR1B, INFI10R1A
Compatible Keypads: 53189, VL501S
Compatible Hot Tub Brands and Control Systems
The Balboa VS520SZ circuit board has been used across a wide range of hot tub brands and control packs, including:
Compatible Control Packs:
- VS520SZ Series Control Packs
- HydroQuip 6230B Series Control Packs
- HydroQuip 4330B Series
- HydroQuip 6330B Series
Hot Tub Brands Known to Use This Board:
- Cal Spas
- Coleman Hot Tubs
- Clearwater Spas
- Any spa originally manufactured with a Balboa VS520SZ control system
Not sure if this board fits your spa? Check the model ID label on top of your existing control system enclosure. The model number printed there is your most reliable confirmation. If you're still unsure, we're here to help — see the contact section below.
Frequently Asked Questions
How do I know if this circuit board is compatible with my hot tub?
The best way to confirm compatibility is to locate the model ID label on the top of your spa's control system enclosure. If it reads "VS520SZ," this is the correct replacement board. You can also cross-reference using any of the part numbers listed above. Still not sure? Call us at 1-855-248-0777 or email fixmytub@gmail.com — our team is happy to help you identify the right part.
Is this a new or refurbished circuit board?
This is a brand-new, factory-fresh circuit board. It has never been installed or used. Every board sold at Western Tub and Pool is genuine and backed by the manufacturer's limited 1-year warranty.
Can I install this board myself?
Circuit board replacement requires a working knowledge of spa electrical systems and proper tools. If you're not comfortable working with electrical components, we strongly recommend hiring a qualified spa technician to handle the installation. Incorrect installation or selection of an incompatible board voids the manufacturer's warranty.
What if I don't know my part number?
No problem. Send us an email at fixmytub@gmail.com with photos of your existing circuit board, along with your hot tub's make, model, and serial number. Our team will identify the correct board for you and confirm availability before you order.
Does this board support a circulation pump and ozonator?
Yes. The VS520SZ supports a 120V circulation pump and 120V ozonator, in addition to primary and secondary pumps, a blower, spa lighting, and a stereo system.
Are circuit boards returnable?
Circuit boards are generally non-returnable once purchased, as they cannot be resold as new once opened. This is why we strongly recommend confirming compatibility before ordering. Our team is always available to assist you in making the right selection.
Can't Find the Part You Need?
We specialize in hard-to-find hot tub and spa parts. If you've been searching for a specific circuit board or spa component without luck, Western Tub and Pool is here to help.
- Email us:fixmytub@gmail.com — Send us your part number, or include photos of your existing board along with your spa's make, model, and serial number, and we'll track down the right part for you.
- Call us: 1-855-248-0777 — Speak directly with a knowledgeable team member who can guide you through the identification and ordering process.
Shop and Order at Western Tub and Pool
Don't let a failed circuit board keep you out of your hot tub. The Balboa VS520SZ Circuit Board 33-55151-K is available now — new, genuine, and ready to ship.
[Call 1-855-248-0777 to Order] | [Email fixmytub@gmail.com for Assistance]
![Balboa VS520SZ Circuit Board 33-55151-K — Genuine Replacement Part
Get your hot tub back up and running with the genuine Balboa VS520SZ Circuit Board (part number 33-55151-K). Available new and in stock at Western Tub and Pool — your trusted source for hard-to-find spa repair parts.
[Shop and Order at Western Tub and Pool — Call 1-855-248-0777]
What Is the Balboa VS520SZ Circuit Board?
The Balboa VS520SZ Circuit Board (part number 33-55151-K) is a factory-new printed circuit board (PCB) designed to replace faulty or failed control boards in VS520SZ-based hot tub systems. Built by Balboa Water Group — one of the most trusted names in spa technology — this board restores full functionality to your spa control system quickly and reliably.
Whether your spa won't heat, won't power on, or is displaying error codes, a failed circuit board is often the culprit. The VS520SZ is a proven, industry-standard replacement that fits a wide range of hot tub brands and control packs.
Key Features and Specifications
Brand: Balboa Water Group
Model: VS520SZ
Primary Part Number: 33-55151-K
Condition: New (factory fresh — never installed)
Connection Type: Serial Standard, 8-Pin Phone Cable
Pump Support: Supports up to 3 pumps, or 2 pumps and a blower
Compatible Sensors: Balboa M7 Sensors
Warranty: Manufacturer's limited 1-year warranty
System Outputs (as configured):
240V Pump 1 (2-Speed)
240V Pump 2 (2-Speed)
240V Blower
120V Circulation Pump
120V Ozonator
12V Spa Light
120V AV / Stereo
240V 5.5kW Heater
Power Requirements:
240VAC, 60Hz, 40A
Class A GFCI-protected service required
Circuit breaker rating: 50A max
4-wire connection (hot, hot, neutral, ground)
Cross-Reference Part Numbers
This board is sold and referenced under several part numbers. If you've seen any of the following on your existing board or in your spa documentation, the 33-55151-K is your replacement:
55151-01
33-0033B-K
33-0033B
330033B
9710-116
59-138-1687
G1157
389276
VS520SZR
33-55151 (HydroQuip)
Associated Chip Numbers: VS520SZR1A, VS520SZR1B, INFI10R1A
Compatible Keypads: 53189, VL501S
Compatible Hot Tub Brands and Control Systems
The Balboa VS520SZ circuit board has been used across a wide range of hot tub brands and control packs, including:
Compatible Control Packs:
VS520SZ Series Control Packs
HydroQuip 6230B Series Control Packs
HydroQuip 4330B Series
HydroQuip 6330B Series
Hot Tub Brands Known to Use This Board:
Cal Spas
Coleman Hot Tubs
Clearwater Spas
Any spa originally manufactured with a Balboa VS520SZ control system
Not sure if this board fits your spa? Check the model ID label on top of your existing control system enclosure. The model number printed there is your most reliable confirmation. If you're still unsure, we're here to help — see the contact section below.
Frequently Asked Questions
How do I know if this circuit board is compatible with my hot tub?
The best way to confirm compatibility is to locate the model ID label on the top of your spa's control system enclosure. If it reads "VS520SZ," this is the correct replacement board. You can also cross-reference using any of the part numbers listed above. Still not sure? Call us at 1-855-248-0777 or email fixmytub@gmail.com — our team is happy to help you identify the right part.
Is this a new or refurbished circuit board?
This is a brand-new, factory-fresh circuit board. It has never been installed or used. Every board sold at Western Tub and Pool is genuine and backed by the manufacturer's limited 1-year warranty.
Can I install this board myself?
Circuit board replacement requires a working knowledge of spa electrical systems and proper tools. If you're not comfortable working with electrical components, we strongly recommend hiring a qualified spa technician to handle the installation. Incorrect installation or selection of an incompatible board voids the manufacturer's warranty.
What if I don't know my part number?
No problem. Send us an email at fixmytub@gmail.com with photos of your existing circuit board, along with your hot tub's make, model, and serial number. Our team will identify the correct board for you and confirm availability before you order.
Does this board support a circulation pump and ozonator?
Yes. The VS520SZ supports a 120V circulation pump and 120V ozonator, in addition to primary and secondary pumps, a blower, spa lighting, and a stereo system.
Are circuit boards returnable?
Circuit boards are generally non-returnable once purchased, as they cannot be resold as new once opened. This is why we strongly recommend confirming compatibility before ordering. Our team is always available to assist you in making the right selection.
Can't Find the Part You Need?
We specialize in hard-to-find hot tub and spa parts. If you've been searching for a specific circuit board or spa component without luck, Western Tub and Pool is here to help.
Email us: fixmytub@gmail.com — Send us your part number, or include photos of your existing board along with your spa's make, model, and serial number, and we'll track down the right part for you.
Call us: 1-855-248-0777 — Speak directly with a knowledgeable team member who can guide you through the identification and ordering process.
Shop and Order at Western Tub and Pool
Don't let a failed circuit board keep you out of your hot tub. The Balboa VS520SZ Circuit Board 33-55151-K is available now — new, genuine, and ready to ship.
[Call 1-855-248-0777 to Order] | [Email fixmytub@gmail.com for Assistance]](https://cdn11.bigcommerce.com/s-b7yzllubsu/images/stencil/500x659/products/4428/6683/33-55151-k__09574.1783199918.PNG?c=2 "Balboa VS520SZ Circuit Board 33-55151-K — Genuine Replacement Part
Get your hot tub back up and running with the genuine Balboa VS520SZ Circuit Board (part number 33-55151-K). Available new and in stock at Western Tub and Pool — your trusted source for hard-to-find spa repair parts.
[Shop and Order at Western Tub and Pool — Call 1-855-248-0777]
What Is the Balboa VS520SZ Circuit Board?
The Balboa VS520SZ Circuit Board (part number 33-55151-K) is a factory-new printed circuit board (PCB) designed to replace faulty or failed control boards in VS520SZ-based hot tub systems. Built by Balboa Water Group — one of the most trusted names in spa technology — this board restores full functionality to your spa control system quickly and reliably.
Whether your spa won't heat, won't power on, or is displaying error codes, a failed circuit board is often the culprit. The VS520SZ is a proven, industry-standard replacement that fits a wide range of hot tub brands and control packs.
Key Features and Specifications
Brand: Balboa Water Group
Model: VS520SZ
Primary Part Number: 33-55151-K
Condition: New (factory fresh — never installed)
Connection Type: Serial Standard, 8-Pin Phone Cable
Pump Support: Supports up to 3 pumps, or 2 pumps and a blower
Compatible Sensors: Balboa M7 Sensors
Warranty: Manufacturer's limited 1-year warranty
System Outputs (as configured):
240V Pump 1 (2-Speed)
240V Pump 2 (2-Speed)
240V Blower
120V Circulation Pump
120V Ozonator
12V Spa Light
120V AV / Stereo
240V 5.5kW Heater
Power Requirements:
240VAC, 60Hz, 40A
Class A GFCI-protected service required
Circuit breaker rating: 50A max
4-wire connection (hot, hot, neutral, ground)
Cross-Reference Part Numbers
This board is sold and referenced under several part numbers. If you've seen any of the following on your existing board or in your spa documentation, the 33-55151-K is your replacement:
55151-01
33-0033B-K
33-0033B
330033B
9710-116
59-138-1687
G1157
389276
VS520SZR
33-55151 (HydroQuip)
Associated Chip Numbers: VS520SZR1A, VS520SZR1B, INFI10R1A
Compatible Keypads: 53189, VL501S
Compatible Hot Tub Brands and Control Systems
The Balboa VS520SZ circuit board has been used across a wide range of hot tub brands and control packs, including:
Compatible Control Packs:
VS520SZ Series Control Packs
HydroQuip 6230B Series Control Packs
HydroQuip 4330B Series
HydroQuip 6330B Series
Hot Tub Brands Known to Use This Board:
Cal Spas
Coleman Hot Tubs
Clearwater Spas
Any spa originally manufactured with a Balboa VS520SZ control system
Not sure if this board fits your spa? Check the model ID label on top of your existing control system enclosure. The model number printed there is your most reliable confirmation. If you're still unsure, we're here to help — see the contact section below.
Frequently Asked Questions
How do I know if this circuit board is compatible with my hot tub?
The best way to confirm compatibility is to locate the model ID label on the top of your spa's control system enclosure. If it reads \"VS520SZ,\" this is the correct replacement board. You can also cross-reference using any of the part numbers listed above. Still not sure? Call us at 1-855-248-0777 or email fixmytub@gmail.com — our team is happy to help you identify the right part.
Is this a new or refurbished circuit board?
This is a brand-new, factory-fresh circuit board. It has never been installed or used. Every board sold at Western Tub and Pool is genuine and backed by the manufacturer's limited 1-year warranty.
Can I install this board myself?
Circuit board replacement requires a working knowledge of spa electrical systems and proper tools. If you're not comfortable working with electrical components, we strongly recommend hiring a qualified spa technician to handle the installation. Incorrect installation or selection of an incompatible board voids the manufacturer's warranty.
What if I don't know my part number?
No problem. Send us an email at fixmytub@gmail.com with photos of your existing circuit board, along with your hot tub's make, model, and serial number. Our team will identify the correct board for you and confirm availability before you order.
Does this board support a circulation pump and ozonator?
Yes. The VS520SZ supports a 120V circulation pump and 120V ozonator, in addition to primary and secondary pumps, a blower, spa lighting, and a stereo system.
Are circuit boards returnable?
Circuit boards are generally non-returnable once purchased, as they cannot be resold as new once opened. This is why we strongly recommend confirming compatibility before ordering. Our team is always available to assist you in making the right selection.
Can't Find the Part You Need?
We specialize in hard-to-find hot tub and spa parts. If you've been searching for a specific circuit board or spa component without luck, Western Tub and Pool is here to help.
Email us: fixmytub@gmail.com — Send us your part number, or include photos of your existing board along with your spa's make, model, and serial number, and we'll track down the right part for you.
Call us: 1-855-248-0777 — Speak directly with a knowledgeable team member who can guide you through the identification and ordering process.
Shop and Order at Western Tub and Pool
Don't let a failed circuit board keep you out of your hot tub. The Balboa VS520SZ Circuit Board 33-55151-K is available now — new, genuine, and ready to ship.
[Call 1-855-248-0777 to Order] | [Email fixmytub@gmail.com for Assistance]")
![Balboa VS520SZ Circuit Board 33-55299-K — New OEM Replacement Part
Get your hot tub running again with a genuine Balboa VS520SZ circuit board. This hard-to-find replacement PCB is in stock at Western Tub and Pool — your trusted source for spa repair parts across North America.
[Shop and Order at Western Tub and Pool — Call 1-855-248-0777]
What Is the Balboa VS520SZ Circuit Board (33-55299-K)?
The Balboa VS520SZ Circuit Board, Part Number 33-55299-K (also known as VS520SZ-3W SER REV01), is a new, genuine printed circuit board (PCB) manufactured by Balboa Water Group. It serves as the main control board for VS520SZ-series hot tub and spa control systems, managing everything from jet pumps and heaters to lighting, ozone, and audio systems.
This board is a direct replacement for aging or failed circuit boards in a wide range of Cal Spas, Coleman, Clearwater, and other hot tubs originally built with the VS520SZ control system.
Product Specifications
Specification
Detail
Part Number
33-55299-K
Also Known As
VS520SZ-3W SER REV01, 55299-01
Brand
Balboa Water Group (BWG)
System Model
VSP-VS520SZ-DCAH / VSP-BDV520SZ-DCAH
Board Type
Printed Circuit Board (PCB) — Serial Standard
Power Requirements
240VAC, 60Hz, 40A, Class A GFCI-protected
Wiring
3-Wire, 240 Volt Operation
Circuit Breaker Rating
50A maximum
Software Version
Version 39
Heater Output
240V, 5.5kW
Condition
Brand New
Associated/Cross-Reference Part Numbers:
33-55151-K · 33-0033B-K · 55151 · 55151-01 · 55299-01 · G1157 · 389276 · 59-138-1687 · 9710-116
Compatible Chip Numbers:
VS520SZR1A · VS520SZR1B · VS520SZR1C · INFI10R1A
Compatible Topside Panels:
53189-01 · 53811 · 55252-01 · 51574-01 · VL501S · VL600 · VL701 · VL701S · VL702S
System Outputs & Controls
This circuit board supports the following hot tub components:
240V Pump 1 — 2-Speed (up to 13 Amps)
240V Pump 2 — 2-Speed (up to 13 Amps)
240V Blower — 1-Speed (up to 8 Amps)
120V Circulation Pump — 24-hour operation with 3°F shutoff
120V Ozonator — Connects to terminal J29
12V Spa Light — Connects to light terminal J20
120V AV/Stereo System — Connects to terminal J50
240V 5.5kW Heater — Primary heating element
IR Receiver Module — Connects to terminal J1 or J2
Optional Expander Accessories Supported:
X-O3 (1-speed pump output)
X-P (blower output)
X-2SP Kit (2-speed pump 2 — adapter PN 25339 required)
X-P231 (high-amperage branch circuit protection)
X-P332 (additional 2-speed pump output — PN 55137)
Hot Tub and Spa Models That Use This Board
The Balboa VS520SZ circuit board is used in the following hot tub brands and control systems:
Cal Spas
All Cal Spas hot tubs originally equipped with a Balboa VS520SZ control system
Verify your model by checking the control system ID label on top of your spa pack
Coleman Spas
CO866L
CO866B
CO866DL
CO756L
CO756B
(Compatible chip numbers: COLE2PDVR1A / COLE2PDVR1B)
Clearwater Spas
All Clearwater Spas originally built with VS520SZ-series Balboa control systems
Compatible Balboa VS520SZ Control Systems
System Part Number
Model
54661-01 (VS520SZ)
VSP-BDV520SZ-DCAH
54661-HC (VS520SZ)
VSP-BDV520SZ-DCAH
56007 (VS520SZ)
VSP-VS520SZ-DCAH
56007-01 (VS520SZ)
VSP-VS520SZ-DCAH
56007-HC (VS520SZ)
VSP-VS520SZ-DCAH
56007HC1 (VS520SZ)
VSP-VS520SZ-DCAH
Not sure if this is the right board for your spa? Always verify compatibility by matching the Model Number on your control system's ID label before ordering. Incompatible boards can look nearly identical. When in doubt, call us — we're here to help.
Not Sure If This Is the Right Part? We Can Help.
The VS520SZ circuit board is a hard-to-find part, and getting the wrong one is a costly mistake. Before ordering, we strongly recommend confirming your part number.
Here's how to get the right answer fast:
Check your part number — Look for the model ID label on top of your spa's control box
Send us a photo — Email a clear picture of your existing board to fixmytub@gmail.com
Share your spa details — Include your hot tub's make, model, and serial number in your email
Call us directly — Our team is ready to help at 1-855-248-0777
We'll confirm compatibility and get you sorted quickly.
Frequently Asked Questions
What does the Balboa VS520SZ circuit board do?
The VS520SZ PCB is the brain of your hot tub's control system. It manages all major electrical components — jet pumps, heaters, lights, blowers, ozone systems, and more. When this board fails, your spa may stop heating, lose pump function, or shut down entirely.
Is this a genuine Balboa circuit board?
Yes. The 33-55299-K sold by Western Tub and Pool is a brand new, genuine Balboa Water Group circuit board, not an aftermarket imitation.
How do I know if my circuit board has failed?
Common symptoms of a failed Balboa VS520SZ circuit board include:
Spa will not power on or keeps tripping the breaker
Error codes on your topside display (e.g., FLO, OH, DR, HOT)
Pumps or heater not responding to controls
Intermittent or complete loss of control panel function
Burnt smell or visible damage on the board
Can I install this circuit board myself?
Circuit board replacement requires knowledge of spa electrical systems. Improper installation or incorrect PCB selection voids the manufacturer's warranty and may damage other components. If you are not experienced with spa electrical work, we recommend hiring a qualified spa technician.
Does the board come pre-configured?
Configuration requirements (DIP switch settings, jumper positions, and voltage settings) vary by installation. Contact us before ordering and we can advise on pre-configuration options. Our team at Western Tub and Pool is happy to walk you through what you need.
What is the warranty on this circuit board?
This board comes with a manufacturer's limited warranty. Contact us at 1-855-248-0777 or fixmytub@gmail.com for full warranty terms and conditions.
Do you ship across Canada and the United States?
Yes. Western Tub and Pool ships spa parts across North America. Contact us for shipping options and delivery timelines to your location.
What if I can't find my part number?
No problem. Send us an email at fixmytub@gmail.com with photos of your existing board and your hot tub's make, model, and serial number. We'll identify the right part for you.
Shop and Order at Western Tub and Pool
Don't let a faulty circuit board keep you out of your hot tub any longer. Western Tub and Pool stocks genuine Balboa replacement parts — including hard-to-find boards like the VS520SZ 33-55299-K — so you can get back to soaking sooner.
Call us: 1-855-248-0777
Email us: fixmytub@gmail.com
Browse our full online catalogue for more Balboa circuit boards, spa packs, pumps, heaters, and accessories — or reach out directly and let our team find exactly what you need.
[Shop Now at Western Tub and Pool] [Email Us at fixmytub@gmail.com] [Call 1-855-248-0777]](https://cdn11.bigcommerce.com/s-b7yzllubsu/images/stencil/500x659/products/4429/6684/33-55299-k__31345.1783200372.PNG?c=2 "Balboa VS520SZ Circuit Board 33-55299-K — New OEM Replacement Part
Get your hot tub running again with a genuine Balboa VS520SZ circuit board. This hard-to-find replacement PCB is in stock at Western Tub and Pool — your trusted source for spa repair parts across North America.
[Shop and Order at Western Tub and Pool — Call 1-855-248-0777]
What Is the Balboa VS520SZ Circuit Board (33-55299-K)?
The Balboa VS520SZ Circuit Board, Part Number 33-55299-K (also known as VS520SZ-3W SER REV01), is a new, genuine printed circuit board (PCB) manufactured by Balboa Water Group. It serves as the main control board for VS520SZ-series hot tub and spa control systems, managing everything from jet pumps and heaters to lighting, ozone, and audio systems.
This board is a direct replacement for aging or failed circuit boards in a wide range of Cal Spas, Coleman, Clearwater, and other hot tubs originally built with the VS520SZ control system.
Product Specifications
Specification
Detail
Part Number
33-55299-K
Also Known As
VS520SZ-3W SER REV01, 55299-01
Brand
Balboa Water Group (BWG)
System Model
VSP-VS520SZ-DCAH / VSP-BDV520SZ-DCAH
Board Type
Printed Circuit Board (PCB) — Serial Standard
Power Requirements
240VAC, 60Hz, 40A, Class A GFCI-protected
Wiring
3-Wire, 240 Volt Operation
Circuit Breaker Rating
50A maximum
Software Version
Version 39
Heater Output
240V, 5.5kW
Condition
Brand New
Associated/Cross-Reference Part Numbers:
33-55151-K · 33-0033B-K · 55151 · 55151-01 · 55299-01 · G1157 · 389276 · 59-138-1687 · 9710-116
Compatible Chip Numbers:
VS520SZR1A · VS520SZR1B · VS520SZR1C · INFI10R1A
Compatible Topside Panels:
53189-01 · 53811 · 55252-01 · 51574-01 · VL501S · VL600 · VL701 · VL701S · VL702S
System Outputs & Controls
This circuit board supports the following hot tub components:
240V Pump 1 — 2-Speed (up to 13 Amps)
240V Pump 2 — 2-Speed (up to 13 Amps)
240V Blower — 1-Speed (up to 8 Amps)
120V Circulation Pump — 24-hour operation with 3°F shutoff
120V Ozonator — Connects to terminal J29
12V Spa Light — Connects to light terminal J20
120V AV/Stereo System — Connects to terminal J50
240V 5.5kW Heater — Primary heating element
IR Receiver Module — Connects to terminal J1 or J2
Optional Expander Accessories Supported:
X-O3 (1-speed pump output)
X-P (blower output)
X-2SP Kit (2-speed pump 2 — adapter PN 25339 required)
X-P231 (high-amperage branch circuit protection)
X-P332 (additional 2-speed pump output — PN 55137)
Hot Tub and Spa Models That Use This Board
The Balboa VS520SZ circuit board is used in the following hot tub brands and control systems:
Cal Spas
All Cal Spas hot tubs originally equipped with a Balboa VS520SZ control system
Verify your model by checking the control system ID label on top of your spa pack
Coleman Spas
CO866L
CO866B
CO866DL
CO756L
CO756B
(Compatible chip numbers: COLE2PDVR1A / COLE2PDVR1B)
Clearwater Spas
All Clearwater Spas originally built with VS520SZ-series Balboa control systems
Compatible Balboa VS520SZ Control Systems
System Part Number
Model
54661-01 (VS520SZ)
VSP-BDV520SZ-DCAH
54661-HC (VS520SZ)
VSP-BDV520SZ-DCAH
56007 (VS520SZ)
VSP-VS520SZ-DCAH
56007-01 (VS520SZ)
VSP-VS520SZ-DCAH
56007-HC (VS520SZ)
VSP-VS520SZ-DCAH
56007HC1 (VS520SZ)
VSP-VS520SZ-DCAH
Not sure if this is the right board for your spa? Always verify compatibility by matching the Model Number on your control system's ID label before ordering. Incompatible boards can look nearly identical. When in doubt, call us — we're here to help.
Not Sure If This Is the Right Part? We Can Help.
The VS520SZ circuit board is a hard-to-find part, and getting the wrong one is a costly mistake. Before ordering, we strongly recommend confirming your part number.
Here's how to get the right answer fast:
Check your part number — Look for the model ID label on top of your spa's control box
Send us a photo — Email a clear picture of your existing board to fixmytub@gmail.com
Share your spa details — Include your hot tub's make, model, and serial number in your email
Call us directly — Our team is ready to help at 1-855-248-0777
We'll confirm compatibility and get you sorted quickly.
Frequently Asked Questions
What does the Balboa VS520SZ circuit board do?
The VS520SZ PCB is the brain of your hot tub's control system. It manages all major electrical components — jet pumps, heaters, lights, blowers, ozone systems, and more. When this board fails, your spa may stop heating, lose pump function, or shut down entirely.
Is this a genuine Balboa circuit board?
Yes. The 33-55299-K sold by Western Tub and Pool is a brand new, genuine Balboa Water Group circuit board, not an aftermarket imitation.
How do I know if my circuit board has failed?
Common symptoms of a failed Balboa VS520SZ circuit board include:
Spa will not power on or keeps tripping the breaker
Error codes on your topside display (e.g., FLO, OH, DR, HOT)
Pumps or heater not responding to controls
Intermittent or complete loss of control panel function
Burnt smell or visible damage on the board
Can I install this circuit board myself?
Circuit board replacement requires knowledge of spa electrical systems. Improper installation or incorrect PCB selection voids the manufacturer's warranty and may damage other components. If you are not experienced with spa electrical work, we recommend hiring a qualified spa technician.
Does the board come pre-configured?
Configuration requirements (DIP switch settings, jumper positions, and voltage settings) vary by installation. Contact us before ordering and we can advise on pre-configuration options. Our team at Western Tub and Pool is happy to walk you through what you need.
What is the warranty on this circuit board?
This board comes with a manufacturer's limited warranty. Contact us at 1-855-248-0777 or fixmytub@gmail.com for full warranty terms and conditions.
Do you ship across Canada and the United States?
Yes. Western Tub and Pool ships spa parts across North America. Contact us for shipping options and delivery timelines to your location.
What if I can't find my part number?
No problem. Send us an email at fixmytub@gmail.com with photos of your existing board and your hot tub's make, model, and serial number. We'll identify the right part for you.
Shop and Order at Western Tub and Pool
Don't let a faulty circuit board keep you out of your hot tub any longer. Western Tub and Pool stocks genuine Balboa replacement parts — including hard-to-find boards like the VS520SZ 33-55299-K — so you can get back to soaking sooner.
Call us: 1-855-248-0777
Email us: fixmytub@gmail.com
Browse our full online catalogue for more Balboa circuit boards, spa packs, pumps, heaters, and accessories — or reach out directly and let our team find exactly what you need.
[Shop Now at Western Tub and Pool] [Email Us at fixmytub@gmail.com] [Call 1-855-248-0777]")
![Upgrade Your Spa with the Balboa VS520SZ
Get your hot tub running flawlessly with the reliable Balboa VS520SZ Spa Control System. Designed for durability and easy installation, it is the perfect replacement spa pak to restore your ultimate relaxation experience.
[Shop and order at Western Tub and Pool]
Superior control for your hot tub
Don't let a faulty control system keep you out of the water. The Balboa VS520SZ is engineered to bring your spa back to life, offering advanced technology that protects your equipment and simplifies maintenance.
Reliable temperature monitoring
Built with patented M7 temperature and flow sensor technology, this system ensures accurate heating and improved longevity without the need for traditional pressure switches.
Weather-resistant design
The system features a durable plastic enclosure designed to eliminate water intrusion, keeping your circuit board and critical components safe from moisture and the elements.
Powerful system outputs
This robust spa pak handles everything your hot tub needs to deliver a premium soak.
Power Configuration: 60Hz/40A
Standard Outputs: 240V Pump #1, 240V Pump #2, 240V 4.0Kw Heater, 120V Ozone, 12V Spa Light
Optional Devices: 240V Circulation Pump, 240V Blower
Product dimensions and specifications
Ensure a perfect fit for your hot tub repair.
Control Box Dimensions: 12-1/4" Width x 10-9/16" Height x 4-1/2" Depth (Overall length with heater is approximately 19.5")
Shipping Dimensions: 20" x 11" x 6"
Weight: 8 lbs
Compatible hot tubs and replacement parts
The Balboa VS520SZ is a versatile control system used by many leading hot tub manufacturers. It is a popular replacement part for brands including Cal Spas and Clearwater Spas, among many others utilizing the Balboa VS series platform.
For seamless integration, compatible controls include:
Panel: 53189
Overlay: 10430
Heater: 58104
Check here and our online catalogue or call us to verify compatibility with your exact make and model.
Frequently asked questions
How do I know if this spa pak will fit my hot tub?
Check your part number if known or send us pictures, the make and model of the hot tub, and your serial number. We can help you verify if the Balboa VS520SZ is the correct fit for your setup.
What if I need help finding a different or older part?
If you require hard to find part assistance, send us an email to fixmytub@gmail.com. Our experts at Western Tub and Pool are ready to track down exactly what you need.
Do you offer guidance on maintaining my hot tub once it is fixed?
Yes! Water care for your hot tub, swim spa, or pool is crucial for your comfort and safety. Western Tub and Pool offers free at-home tutorials to discuss the intricacies of your spa, hot tub, or pool maintenance.
How can I get in touch for more information?
Call us for more information or assistance with these replacement hot tub repair parts and other spa parts at Western Tub and Pool at 1-855-248-0777 or email us at fixmytub@gmail.com.
Get your hot tub back in action
Don't wait to enjoy your spa again. Contact our experts today to secure your replacement parts and get back to relaxing.
[Shop and order at Western Tub and Pool]](https://cdn11.bigcommerce.com/s-b7yzllubsu/images/stencil/500x659/products/4212/6257/SPA-BIVS513__61253.1773769154.jpg?c=2 "Upgrade Your Spa with the Balboa VS520SZ
Get your hot tub running flawlessly with the reliable Balboa VS520SZ Spa Control System. Designed for durability and easy installation, it is the perfect replacement spa pak to restore your ultimate relaxation experience.
[Shop and order at Western Tub and Pool]
Superior control for your hot tub
Don't let a faulty control system keep you out of the water. The Balboa VS520SZ is engineered to bring your spa back to life, offering advanced technology that protects your equipment and simplifies maintenance.
Reliable temperature monitoring
Built with patented M7 temperature and flow sensor technology, this system ensures accurate heating and improved longevity without the need for traditional pressure switches.
Weather-resistant design
The system features a durable plastic enclosure designed to eliminate water intrusion, keeping your circuit board and critical components safe from moisture and the elements.
Powerful system outputs
This robust spa pak handles everything your hot tub needs to deliver a premium soak.
Power Configuration: 60Hz/40A
Standard Outputs: 240V Pump #1, 240V Pump #2, 240V 4.0Kw Heater, 120V Ozone, 12V Spa Light
Optional Devices: 240V Circulation Pump, 240V Blower
Product dimensions and specifications
Ensure a perfect fit for your hot tub repair.
Control Box Dimensions: 12-1/4\" Width x 10-9/16\" Height x 4-1/2\" Depth (Overall length with heater is approximately 19.5\")
Shipping Dimensions: 20\" x 11\" x 6\"
Weight: 8 lbs
Compatible hot tubs and replacement parts
The Balboa VS520SZ is a versatile control system used by many leading hot tub manufacturers. It is a popular replacement part for brands including Cal Spas and Clearwater Spas, among many others utilizing the Balboa VS series platform.
For seamless integration, compatible controls include:
Panel: 53189
Overlay: 10430
Heater: 58104
Check here and our online catalogue or call us to verify compatibility with your exact make and model.
Frequently asked questions
How do I know if this spa pak will fit my hot tub?
Check your part number if known or send us pictures, the make and model of the hot tub, and your serial number. We can help you verify if the Balboa VS520SZ is the correct fit for your setup.
What if I need help finding a different or older part?
If you require hard to find part assistance, send us an email to fixmytub@gmail.com. Our experts at Western Tub and Pool are ready to track down exactly what you need.
Do you offer guidance on maintaining my hot tub once it is fixed?
Yes! Water care for your hot tub, swim spa, or pool is crucial for your comfort and safety. Western Tub and Pool offers free at-home tutorials to discuss the intricacies of your spa, hot tub, or pool maintenance.
How can I get in touch for more information?
Call us for more information or assistance with these replacement hot tub repair parts and other spa parts at Western Tub and Pool at 1-855-248-0777 or email us at fixmytub@gmail.com.
Get your hot tub back in action
Don't wait to enjoy your spa again. Contact our experts today to secure your replacement parts and get back to relaxing.
[Shop and order at Western Tub and Pool]")
![Balboa VS504SZ Circuit Board 33-54638-K — Genuine Replacement Part
Your hot tub deserves a genuine fix. The Balboa VS504SZ Circuit Board (Part # 33-54638-K / 54638-01) is the exact replacement board for VS504SZ spa control systems — designed to restore full functionality quickly and reliably.
Shop and order at Western Tub and Pool, or call us at 1-855-248-0777 for expert assistance.
[Shop Now] [Call Us: 1-855-248-0777]
Product Overview
The Balboa VS504SZ Circuit Board is a factory-replacement printed circuit board (PCB) manufactured by Balboa Water Group — one of the most trusted names in spa control technology. Whether your existing board has failed, shorted, or simply worn out, this is the part that gets your hot tub back up and running.
Part Numbers & Identifiers:
SKU: 54638
MPN: 54638-01
Model: VS504SZ
UPC: 605380994309
Manufacturer: Balboa Water Group
Warranty: 1 year (with manufacturer)
Chip Number: VS504SZR1B
Specifications & Dimensions
Specification
Details
Control — Pump 1
2-Speed
Control — Pump 2
1-Speed
Additional Controls
Ozone, A/V
Cable Type
Phone Style
Length
13 inches
Width
7.4 inches
Height
3.25 inches
Weight
Approx. 2.5 lbs
Compatible Topside Panels
This circuit board is compatible with the following Balboa topside control panels:
VL700S Topside Panel (with correct 6-button layout)
VL701S Topside Panel (with correct 6-button layout)
VX20 Auxiliary Topside Panel
VX40S Auxiliary Topside Panel
Hot Tub Models & Systems That Use This Board
This circuit board serves as a compatible replacement for the following part numbers and control systems:
Direct Replacement / Compatible Part Numbers:
55372
55370-01 (Control System)
54637-01 (System model VSP-VS504SZ-DCAH)
55636 (CS504SZ System)
55637 (CS504SZER1X)
55257
55174
55173-01
33-0612-08CB (Artesian)
33-54638-K
56532
G1153
OP33-0612-08CB (Artesian)
Coleman Hot Tub Models:
107-961 / 107961
107-068 / 107068
Also Replaces:
VS514SZR1A
MVS504SZ
Alternate Part Numbers:
55637 (Balboa)
OP33-0612-08CB (Artesian)
107-961 (Coleman)
3-60-6033
Why Buy From Western Tub and Pool?
Finding the right circuit board for your spa can be frustrating. At Western Tub and Pool, we specialize in hard-to-find hot tub replacement parts and have helped thousands of spa owners get their systems back online.
Expert Guidance
Not sure if this is the right board for your tub? Our team can help you confirm compatibility before you order. Just call us at 1-855-248-0777 or email fixmytub@gmail.com with your make, model, serial number, and part number (or a photo of your existing board).
Genuine Parts
We carry genuine Balboa Water Group components — not cheap knock-offs. Every board is backed by the manufacturer's 1-year limited warranty.
Fast Shipping
Parts ship quickly so your hot tub downtime is kept to a minimum.
[Shop and Order at Western Tub and Pool]
Important Installation Notes
Circuit boards are not plug-and-play. Before installing, please note the following:
Correct component voltage setup is required — component wires on the board may need to be moved
DIP switches must be configured correctly for your system
Some configuration on the topside panel may also be required
Always reference the wiring schematics on the back of the spa pack cover
Do not select a board based on appearance — many boards look nearly identical but contain different software or chips
Electrical or physical damage resulting from improper installation voids the manufacturer's warranty
If you are unsure about any step of the installation process, we strongly recommend engaging a qualified spa technician.
Frequently Asked Questions
How do I know if this is the right circuit board for my hot tub?
The most reliable way to confirm compatibility is to match the Model Number from your spa control system's ID label — typically found on the top of the control box. You can also check the part numbers listed above or contact our team directly.
Can I send in photos to confirm the right part?
Absolutely. Email us at fixmytub@gmail.com with photos of your existing board, your hot tub's make and model, and the serial number. Our team will confirm whether this is the right replacement before you order.
Does this board come pre-configured?
Configuration options may be available depending on where you order. Contact us at 1-855-248-0777 to discuss your specific electrical setup, including your service voltage, pump configurations, and ozonator circuit requirements.
Can I return a circuit board if I order the wrong one?
Circuit boards are non-returnable electrical items, as they cannot be resold once handled. That's why we strongly encourage you to verify your part number or contact us before placing your order.
What warranty does this circuit board come with?
This board is backed by a 1-year limited warranty from Balboa Water Group, covering manufacturer defects. Damage from improper installation or incorrect PCB selection is not covered under warranty.
Does my hot tub need to be serviced by a professional?
If you're comfortable with basic electrical work and spa systems, many owners complete this replacement themselves. However, if you're unsure about voltage configurations or wiring, professional installation is always recommended.
Can't Find Your Part? We Can Help.
Not every hot tub part is easy to track down. If you're dealing with an older spa, an unusual model, or a board that's been discontinued, Western Tub and Pool specializes in sourcing hard-to-find replacement parts.
Here's how to get help fast:
Call us at 1-855-248-0777 during business hours
Email us at fixmytub@gmail.com with your part number, make, model, and serial number
Send photos of your existing board or control system — we'll identify it for you
Get Your Hot Tub Running Again — Shop at Western Tub and Pool
Don't let a faulty circuit board keep your spa out of commission. The Balboa VS504SZ Circuit Board (33-54638-K) is in stock and ready to ship.
Shop and order at Western Tub and Pool.
[Order Now] [Call 1-855-248-0777] [Email fixmytub@gmail.com]](https://cdn11.bigcommerce.com/s-b7yzllubsu/images/stencil/500x659/products/4419/6672/33-54638-k__73999.1781993432.PNG?c=2 "Balboa VS504SZ Circuit Board 33-54638-K — Genuine Replacement Part
Your hot tub deserves a genuine fix. The Balboa VS504SZ Circuit Board (Part # 33-54638-K / 54638-01) is the exact replacement board for VS504SZ spa control systems — designed to restore full functionality quickly and reliably.
Shop and order at Western Tub and Pool, or call us at 1-855-248-0777 for expert assistance.
[Shop Now] [Call Us: 1-855-248-0777]
Product Overview
The Balboa VS504SZ Circuit Board is a factory-replacement printed circuit board (PCB) manufactured by Balboa Water Group — one of the most trusted names in spa control technology. Whether your existing board has failed, shorted, or simply worn out, this is the part that gets your hot tub back up and running.
Part Numbers & Identifiers:
SKU: 54638
MPN: 54638-01
Model: VS504SZ
UPC: 605380994309
Manufacturer: Balboa Water Group
Warranty: 1 year (with manufacturer)
Chip Number: VS504SZR1B
Specifications & Dimensions
Specification
Details
Control — Pump 1
2-Speed
Control — Pump 2
1-Speed
Additional Controls
Ozone, A/V
Cable Type
Phone Style
Length
13 inches
Width
7.4 inches
Height
3.25 inches
Weight
Approx. 2.5 lbs
Compatible Topside Panels
This circuit board is compatible with the following Balboa topside control panels:
VL700S Topside Panel (with correct 6-button layout)
VL701S Topside Panel (with correct 6-button layout)
VX20 Auxiliary Topside Panel
VX40S Auxiliary Topside Panel
Hot Tub Models & Systems That Use This Board
This circuit board serves as a compatible replacement for the following part numbers and control systems:
Direct Replacement / Compatible Part Numbers:
55372
55370-01 (Control System)
54637-01 (System model VSP-VS504SZ-DCAH)
55636 (CS504SZ System)
55637 (CS504SZER1X)
55257
55174
55173-01
33-0612-08CB (Artesian)
33-54638-K
56532
G1153
OP33-0612-08CB (Artesian)
Coleman Hot Tub Models:
107-961 / 107961
107-068 / 107068
Also Replaces:
VS514SZR1A
MVS504SZ
Alternate Part Numbers:
55637 (Balboa)
OP33-0612-08CB (Artesian)
107-961 (Coleman)
3-60-6033
Why Buy From Western Tub and Pool?
Finding the right circuit board for your spa can be frustrating. At Western Tub and Pool, we specialize in hard-to-find hot tub replacement parts and have helped thousands of spa owners get their systems back online.
Expert Guidance
Not sure if this is the right board for your tub? Our team can help you confirm compatibility before you order. Just call us at 1-855-248-0777 or email fixmytub@gmail.com with your make, model, serial number, and part number (or a photo of your existing board).
Genuine Parts
We carry genuine Balboa Water Group components — not cheap knock-offs. Every board is backed by the manufacturer's 1-year limited warranty.
Fast Shipping
Parts ship quickly so your hot tub downtime is kept to a minimum.
[Shop and Order at Western Tub and Pool]
Important Installation Notes
Circuit boards are not plug-and-play. Before installing, please note the following:
Correct component voltage setup is required — component wires on the board may need to be moved
DIP switches must be configured correctly for your system
Some configuration on the topside panel may also be required
Always reference the wiring schematics on the back of the spa pack cover
Do not select a board based on appearance — many boards look nearly identical but contain different software or chips
Electrical or physical damage resulting from improper installation voids the manufacturer's warranty
If you are unsure about any step of the installation process, we strongly recommend engaging a qualified spa technician.
Frequently Asked Questions
How do I know if this is the right circuit board for my hot tub?
The most reliable way to confirm compatibility is to match the Model Number from your spa control system's ID label — typically found on the top of the control box. You can also check the part numbers listed above or contact our team directly.
Can I send in photos to confirm the right part?
Absolutely. Email us at fixmytub@gmail.com with photos of your existing board, your hot tub's make and model, and the serial number. Our team will confirm whether this is the right replacement before you order.
Does this board come pre-configured?
Configuration options may be available depending on where you order. Contact us at 1-855-248-0777 to discuss your specific electrical setup, including your service voltage, pump configurations, and ozonator circuit requirements.
Can I return a circuit board if I order the wrong one?
Circuit boards are non-returnable electrical items, as they cannot be resold once handled. That's why we strongly encourage you to verify your part number or contact us before placing your order.
What warranty does this circuit board come with?
This board is backed by a 1-year limited warranty from Balboa Water Group, covering manufacturer defects. Damage from improper installation or incorrect PCB selection is not covered under warranty.
Does my hot tub need to be serviced by a professional?
If you're comfortable with basic electrical work and spa systems, many owners complete this replacement themselves. However, if you're unsure about voltage configurations or wiring, professional installation is always recommended.
Can't Find Your Part? We Can Help.
Not every hot tub part is easy to track down. If you're dealing with an older spa, an unusual model, or a board that's been discontinued, Western Tub and Pool specializes in sourcing hard-to-find replacement parts.
Here's how to get help fast:
Call us at 1-855-248-0777 during business hours
Email us at fixmytub@gmail.com with your part number, make, model, and serial number
Send photos of your existing board or control system — we'll identify it for you
Get Your Hot Tub Running Again — Shop at Western Tub and Pool
Don't let a faulty circuit board keep your spa out of commission. The Balboa VS504SZ Circuit Board (33-54638-K) is in stock and ready to ship.
Shop and order at Western Tub and Pool.
[Order Now] [Call 1-855-248-0777] [Email fixmytub@gmail.com]")
![Balboa VS511Z Circuit Board (Part #33-54383-K) — New Replacement Board
Get your hot tub running again with a brand-new Balboa VS511Z Duplex Digital Circuit Board, one of the most trusted replacement boards in the spa industry. Whether your current board has failed, burnt out, or simply stopped responding, this is the genuine replacement you need — and Western Tub and Pool has it in stock.
[Shop and Order at Western Tub and Pool — Call 1-855-248-0777]
What Is the Balboa VS511Z Circuit Board?
The Balboa VS511Z (Part #33-54383-K) is a Duplex Digital circuit board manufactured by Balboa Water Group, designed for use in VS511Z spa control systems. It is a direct, factory-new replacement for a wide range of Balboa-powered hot tubs and spas.
Also known as / replaces the following part numbers:
33-54383-K (HydroQuip)
54383-04 (Balboa Water Group base PCBA)
54385-03
33-0033A-K
33-54385-K
402238
GVS511SZR1A
VS511SZ
VS511SZR2
Compatible chip numbers (found on the white sticker near the center of your board):
VS511ZR2E
VS511ZR2A-E
SVS511R1A
VS511Z
Key Features and Specifications
Dual Pump Support
The VS511Z supports two 2-speed pumps, making it ideal for spas that run multiple jet pumps simultaneously. No blower connection is required.
Circ Pump Ready
This board includes a circulation pump option, supporting energy-efficient 24-hour filtration modes — configurable via DIP switch settings.
Ozone Connector Included
An on-board ozone connector (J29) supports both 120V and 240V ozone generators, giving you flexibility depending on your spa's configuration.
Multiple Compatible Topside Panels
The VS511Z works seamlessly with the following Balboa topside control panels:
VL401 – LCD Lite Duplex (PN 54251)
VL402 – LCD Duplex Digital (PN 54107)
VL403 – LED Lite Duplex (PN 54104-01)
VL404 – LED Duplex Digital (PN 51248)
Battery-Free Persistent Memory
Stores your filter settings, set temperature, and heat mode — no battery required. Settings are retained even after a power interruption.
Flexible Operating Modes
DIP switch configurable for:
Standard, Economy, and Sleep modes
50Hz or 60Hz operation
Celsius or Fahrenheit temperature display
Phone-Style Plug Connection
Features a phone-style cable plug, compatible with standard Balboa Duplex panel wiring setups.
Compatible Control Systems
The Balboa VS511Z circuit board (54383-04) is used in the following Balboa VS511Z and VS511SZ spa control systems:
System Part Number
System Type
Compatible Heater
54382-01
VS511Z
58121
54382-02
VS511Z
58121
54382-03
VS511Z
58121
54382-04
VS511Z
58121
54384
VS511SZ
58121
54384-02
VS511SZ
58083
54384-03
VS511SZ
58083
54384-04
VS511SZ
58083
55053-01
VS511SZ
58104
55053-03
VS511SZ
58104
These control systems are found in a wide range of Balboa-powered Duplex Digital hot tubs, including spas from the 4220B and 6220B series. Associated spa brands that have historically used Balboa VS511Z series control systems include, but may not be limited to:
Great Lakes Spas (GVS511 / GVS511SZ series)
Keys Backyard Spas (Duplex Digital models)
Various OEM spa brands using Balboa VS Duplex Digital systems
Not sure if this board fits your spa? That's what we're here for. Call us at 1-855-248-0777 or email fixmytub@gmail.com and we'll help you confirm the right part before you order.
How to Identify Your Circuit Board
Ordering the wrong circuit board is a costly mistake — and an easy one to make, because many Balboa boards look nearly identical. Here's how to make sure you're ordering the right one:
Locate the chip number: Find the small white sticker near the center of your existing circuit board. The chip number — not the board's appearance — is what identifies it.
Note your five-digit board number: Most Balboa boards have a five-digit number (e.g., 54383) printed or labeled on the board.
Gather your spa details: Your spa's make, model, and serial number will help us cross-reference your part quickly.
Send us a photo: If you're unsure, email a clear photo of your existing board to fixmytub@gmail.com and our team will confirm the match.
Important: Do not order a circuit board based on looks alone. Multiple boards share the same appearance but contain different chips and software. Always verify using the chip number or contact us first.
Frequently Asked Questions
Is this a new board or a refurbished one?
This is a brand-new Balboa VS511Z circuit board — never installed, factory fresh. You won't receive a rebuilt or refurbished unit.
How do I know if this is the right board for my spa?
The most reliable way is to match the chip number on your existing board (found on a white sticker near the board's center) to the compatible chip numbers listed above: VS511ZR2E, VS511ZR2A-E, SVS511R1A, or VS511Z. If you're still unsure, call us at 1-855-248-0777 or email a photo of your board to fixmytub@gmail.com.
What part numbers does this board replace?
This board replaces: 33-0033A-K, 33-54385-K, 402238, 54385-03, GVS511SZR1A, VS511SZ, and VS511SZR2.
What topside control panels are compatible with this board?
The VS511Z is compatible with the VL401 (LCD Lite Duplex), VL402 (LCD Duplex Digital), VL403 (LED Lite Duplex), and VL404 (LED Duplex Digital) panels.
Can I return this board if it doesn't fit?
Circuit boards are non-returnable once purchased, as they cannot be resold as new to another spa owner. This is why we strongly encourage you to verify your part number before ordering. Our team is happy to assist — just call or email us before purchasing.
Do you carry other Balboa parts or spa components?
Yes. Western Tub and Pool carries a wide range of hot tub and spa repair parts, including hard-to-find components. If you can't find what you need in our catalogue, give us a call and we'll do our best to source it for you.
What if I can't find my part number anywhere?
We specialize in hard-to-find spa parts. Send us an email at fixmytub@gmail.com with your spa's make, model, and serial number, along with any photos of the existing part, and we'll track down what you need.
Shop and Order at Western Tub and Pool
Don't let a failed circuit board put your hot tub out of commission. The Balboa VS511Z (33-54383-K) is a proven, reliable replacement that will have your spa back up and running.
Call us: 1-855-248-0777
Email us: fixmytub@gmail.com
Browse our catalogue for a full range of Balboa circuit boards, spa packs, topside panels, heaters, and more.
[Shop and Order at Western Tub and Pool]
Not sure this is the right part? Send us your spa's make, model, serial number, or a photo of your existing board at fixmytub@gmail.com — we'll confirm the correct part number before you order.](https://cdn11.bigcommerce.com/s-b7yzllubsu/images/stencil/500x659/products/4425/6680/33-54383-k__38392.1783193373.PNG?c=2 "Balboa VS511Z Circuit Board (Part #33-54383-K) — New Replacement Board
Get your hot tub running again with a brand-new Balboa VS511Z Duplex Digital Circuit Board, one of the most trusted replacement boards in the spa industry. Whether your current board has failed, burnt out, or simply stopped responding, this is the genuine replacement you need — and Western Tub and Pool has it in stock.
[Shop and Order at Western Tub and Pool — Call 1-855-248-0777]
What Is the Balboa VS511Z Circuit Board?
The Balboa VS511Z (Part #33-54383-K) is a Duplex Digital circuit board manufactured by Balboa Water Group, designed for use in VS511Z spa control systems. It is a direct, factory-new replacement for a wide range of Balboa-powered hot tubs and spas.
Also known as / replaces the following part numbers:
33-54383-K (HydroQuip)
54383-04 (Balboa Water Group base PCBA)
54385-03
33-0033A-K
33-54385-K
402238
GVS511SZR1A
VS511SZ
VS511SZR2
Compatible chip numbers (found on the white sticker near the center of your board):
VS511ZR2E
VS511ZR2A-E
SVS511R1A
VS511Z
Key Features and Specifications
Dual Pump Support
The VS511Z supports two 2-speed pumps, making it ideal for spas that run multiple jet pumps simultaneously. No blower connection is required.
Circ Pump Ready
This board includes a circulation pump option, supporting energy-efficient 24-hour filtration modes — configurable via DIP switch settings.
Ozone Connector Included
An on-board ozone connector (J29) supports both 120V and 240V ozone generators, giving you flexibility depending on your spa's configuration.
Multiple Compatible Topside Panels
The VS511Z works seamlessly with the following Balboa topside control panels:
VL401 – LCD Lite Duplex (PN 54251)
VL402 – LCD Duplex Digital (PN 54107)
VL403 – LED Lite Duplex (PN 54104-01)
VL404 – LED Duplex Digital (PN 51248)
Battery-Free Persistent Memory
Stores your filter settings, set temperature, and heat mode — no battery required. Settings are retained even after a power interruption.
Flexible Operating Modes
DIP switch configurable for:
Standard, Economy, and Sleep modes
50Hz or 60Hz operation
Celsius or Fahrenheit temperature display
Phone-Style Plug Connection
Features a phone-style cable plug, compatible with standard Balboa Duplex panel wiring setups.
Compatible Control Systems
The Balboa VS511Z circuit board (54383-04) is used in the following Balboa VS511Z and VS511SZ spa control systems:
System Part Number
System Type
Compatible Heater
54382-01
VS511Z
58121
54382-02
VS511Z
58121
54382-03
VS511Z
58121
54382-04
VS511Z
58121
54384
VS511SZ
58121
54384-02
VS511SZ
58083
54384-03
VS511SZ
58083
54384-04
VS511SZ
58083
55053-01
VS511SZ
58104
55053-03
VS511SZ
58104
These control systems are found in a wide range of Balboa-powered Duplex Digital hot tubs, including spas from the 4220B and 6220B series. Associated spa brands that have historically used Balboa VS511Z series control systems include, but may not be limited to:
Great Lakes Spas (GVS511 / GVS511SZ series)
Keys Backyard Spas (Duplex Digital models)
Various OEM spa brands using Balboa VS Duplex Digital systems
Not sure if this board fits your spa? That's what we're here for. Call us at 1-855-248-0777 or email fixmytub@gmail.com and we'll help you confirm the right part before you order.
How to Identify Your Circuit Board
Ordering the wrong circuit board is a costly mistake — and an easy one to make, because many Balboa boards look nearly identical. Here's how to make sure you're ordering the right one:
Locate the chip number: Find the small white sticker near the center of your existing circuit board. The chip number — not the board's appearance — is what identifies it.
Note your five-digit board number: Most Balboa boards have a five-digit number (e.g., 54383) printed or labeled on the board.
Gather your spa details: Your spa's make, model, and serial number will help us cross-reference your part quickly.
Send us a photo: If you're unsure, email a clear photo of your existing board to fixmytub@gmail.com and our team will confirm the match.
Important: Do not order a circuit board based on looks alone. Multiple boards share the same appearance but contain different chips and software. Always verify using the chip number or contact us first.
Frequently Asked Questions
Is this a new board or a refurbished one?
This is a brand-new Balboa VS511Z circuit board — never installed, factory fresh. You won't receive a rebuilt or refurbished unit.
How do I know if this is the right board for my spa?
The most reliable way is to match the chip number on your existing board (found on a white sticker near the board's center) to the compatible chip numbers listed above: VS511ZR2E, VS511ZR2A-E, SVS511R1A, or VS511Z. If you're still unsure, call us at 1-855-248-0777 or email a photo of your board to fixmytub@gmail.com.
What part numbers does this board replace?
This board replaces: 33-0033A-K, 33-54385-K, 402238, 54385-03, GVS511SZR1A, VS511SZ, and VS511SZR2.
What topside control panels are compatible with this board?
The VS511Z is compatible with the VL401 (LCD Lite Duplex), VL402 (LCD Duplex Digital), VL403 (LED Lite Duplex), and VL404 (LED Duplex Digital) panels.
Can I return this board if it doesn't fit?
Circuit boards are non-returnable once purchased, as they cannot be resold as new to another spa owner. This is why we strongly encourage you to verify your part number before ordering. Our team is happy to assist — just call or email us before purchasing.
Do you carry other Balboa parts or spa components?
Yes. Western Tub and Pool carries a wide range of hot tub and spa repair parts, including hard-to-find components. If you can't find what you need in our catalogue, give us a call and we'll do our best to source it for you.
What if I can't find my part number anywhere?
We specialize in hard-to-find spa parts. Send us an email at fixmytub@gmail.com with your spa's make, model, and serial number, along with any photos of the existing part, and we'll track down what you need.
Shop and Order at Western Tub and Pool
Don't let a failed circuit board put your hot tub out of commission. The Balboa VS511Z (33-54383-K) is a proven, reliable replacement that will have your spa back up and running.
Call us: 1-855-248-0777
Email us: fixmytub@gmail.com
Browse our catalogue for a full range of Balboa circuit boards, spa packs, topside panels, heaters, and more.
[Shop and Order at Western Tub and Pool]
Not sure this is the right part? Send us your spa's make, model, serial number, or a photo of your existing board at fixmytub@gmail.com — we'll confirm the correct part number before you order.")
