Product Description

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]
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