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Product Description
Genuine Marquis MQBP20UX Circuit Board 600-6315 — In Stock & Ready to Ship
Is your spa throwing error codes, ignoring your topside controls, or refusing to power on at all? Don't replace the whole spa pack—replace the board that's actually causing the problem. The Marquis MQBP20UX Circuit Board (Part #600-6315) is a brand-new, genuine OEM replacement built by Balboa Water Group specifically for Marquis spas, restoring reliable pump, heater, and filtration control so you can get back to soaking, not troubleshooting.
Shop and order at Western Tub and Pool.
Why This Board Fixes What Others Can't
Genuine OEM Quality
Manufactured by Balboa Water Group (Balboa Part #59199) to Marquis's exact specifications, this board isn't a generic aftermarket substitute—it's the real OEM part.
New, Never Installed
No refurbished guesswork here. This is a factory-new board, ready to install and back to work immediately.
Backed by a 1-Year Limited Warranty
Covered by a manufacturer's warranty against defects, giving you confidence in your purchase.
Configurable for Your Spa's Setup
Whether your spa predates April 2018 or came after Marquis standardized production, this board can be configured to match your original setup—Setup 1 or Setup 2.
Solves the Problems That Matter
This board addresses the most common (and most frustrating) spa control issues, including:
- Persistent error codes that won't clear
- Pumps that ignore topside controller commands
- Heaters that won't cycle on or off correctly
- Erratic or non-existent filtration cycles
- A spa that's completely unresponsive after a power reset
- A blank or garbled topside display
Product Specifications
|
Specification |
Detail |
|---|---|
|
Marquis Part Number |
600-6315 (also listed as MRQ600-6315) |
|
Balboa Part Number |
59199 |
|
Board Designation |
BP20-MQBP20UX-BS (MP20 platform) |
|
Chip Number |
MQBP20UXR3B (current revision) |
|
Condition |
New, factory original |
|
Cord Type |
Plug & Click |
|
Warranty |
1-year limited manufacturer's warranty |
Have questions about the board's physical dimensions or shipping weight? Give us a call or send an email—our team can confirm exact specs for your order before you check out.
Cross-Reference & Replacement Numbers
This board is a direct replacement for the following discontinued part numbers:
|
Old Part Number |
Status |
|---|---|
|
600-6307 |
Discontinued — replaced by 600-6315 |
|
600-6314 |
Discontinued — replaced by 600-6315 |
|
MRQ600-6307 |
Discontinued (Marquis variant) |
|
MRQ600-6314 |
Discontinued (Marquis variant) |
|
MQBP20UX-BS R2A |
Earlier chip revision — replaced by MQBP20UXR3B |
If your old board shows any of the numbers above, the 600-6315 is your correct upgrade.
Which Hot Tubs Use This Board?
The Marquis MQBP20UX Circuit Board (600-6315) is compatible with the following spa series and model years:
|
Spa Series |
Model Years |
Notes |
|---|---|---|
|
Signature Series |
2013–2019 |
All models |
|
E-Series (2-Pump) |
2015–2019 |
2-pump models only—single-pump E-Series uses a different board |
|
Vector Series with MicroSilk |
2015–2019 |
All Vector/MicroSilk models |
Not sure if your spa falls in this range? Check the model and year printed on your spa's nameplate or equipment compartment label, or send us the details and we'll confirm fitment before you order.
Frequently Asked Questions
Q: How do I know if this is the right board for my spa?
A: Confirm your spa's model, year, and pump configuration against the compatibility table above. If your current board shows chip number MQBP20UX-BS R2A, or part number 600-6307 or 600-6314, this board is your match. Still unsure? Send us a photo of your existing board, along with your spa's make, model, and serial number, and we'll verify it for you.
Q: Does this board need to be configured after installation?
A: Yes. Marquis spas built before April 2018 may use a different setup configuration than spas built after, when production standardized to Setup 2. The 600-6315 board supports both setups, but it must be configured to match your spa during installation. We recommend having a licensed electrician handle installation and setup.
Q: Can I install this myself?
A: Circuit board installation involves working with electrical components and should be performed by a licensed electrician in compliance with NEC Article 680 and all applicable local codes. A Class A GFCI, proper grounding and bonding, and a dedicated circuit are required.
Q: What if my E-Series spa has one pump instead of two?
A: This board only covers 2-pump E-Series models. Single-pump E-Series spas require a different circuit board. Contact us with your model details and we'll point you to the correct part.
Q: What's covered under warranty?
A: This board comes with a 1-year limited manufacturer's warranty against defects. As with all electrical spa components, damage caused by incorrect installation isn't covered, so professional installation is strongly recommended.
Q: Do you carry related parts if I need more than just the board?
A: Yes. We stock a range of Marquis-compatible circuit boards and spa pack components. Browse our online catalogue or call us and we'll help you find everything your spa needs in one order.
Hard-to-Find Spa Part? We'll Track It Down.
Can't find the exact part your spa needs? Email us at fixmytub@gmail.com and our team will help you identify it.
As an international e-retailer, Western Tub and Pool sources inventory from warehouses across multiple regions—which means shipping times and part origin can vary. To keep things clear, we've added regional suffixes to our part listings:
- U — USA
- C — Canada
- E — Europe
- A — Asia
Because we carry inventory across regions, you may see what looks like a duplicate listing for the same part—that's simply the same product sourced from a different warehouse.
If you know your part number, search it directly in our catalogue. If you're not sure, send us a photo of the part along with your hot tub's make, model, and serial number, and we'll match you with the correct replacement.
Shop and order at Western Tub and Pool — your source for genuine Marquis spa parts, backed by real support when you need it.
![Marquis LZM2UR1B Circuit Board 600-6293 – Genuine Replacement Spa Pack Board
Restore your Marquis spa to full working order with the 600-6293 circuit board, the OEM Balboa-manufactured replacement for 2006-2008 Marquis models. If your control panel isn't responding, your pumps won't kick in, or your spa is throwing error codes, a failing circuit board is often the culprit—and this board is the exact fix your system needs.
[Shop and Order at Western Tub and Pool]
Why This Board Is the Right Fix
Genuine OEM Quality: Manufactured by Balboa for Marquis spa systems, this is a brand-new, factory-original board—not a generic aftermarket substitute.
No Pressure Switch Needed: Built on the VS501Z platform with Balboa's M7 technology, this board handles temperature and water flow sensing without a separate pressure switch, meaning fewer parts to fail down the line.
Full-Function Control: Runs your 2-speed primary pump, 1-speed secondary pump, 12V spa light, and ozonator, so every feature of your spa stays operational.
Confirmed Compatibility: Covers a wide range of 2006 and 2007 Marquis models, plus every 2008 Marquis spa, so there's a strong chance this is the exact board your tub needs.
Direct Upgrade Path: This board replaces the older 600-6288, so if your spa used that part, 600-6293 is your drop-in solution.
Cross-Reference & Compatible Part Numbers
Use this table to confirm you're ordering the right part:
Reference Type
Number(s)
Marquis Part Number
600-6293 (also listed as MRQ600-6293)
Chip Number
LZM2UR1B (also covers LZM1UR1, LZM2UR1A, LZM2UR1C)
Balboa Part Number
54343 / 54343-01
Control Box Number
54342 (plastic enclosure)
Replaces
600-6288
Compatible Topside Panel
650-0635
Associated repair parts to check alongside this board include the 54342 plastic control box and the 650-0635 topside control panel—both work directly with this system.
Hot Tubs & Models That Use This Circuit Board
2006 Models: Quest, Ult630, Ult530, Ult418, Ult315, 630, 530, 418, 315, Retreat, Rendezvous
2007 Models: Quest, 641R, 520M, 744E, 319S, Ult630, Ult530, Ult418, Ult315, 630, 530, 418, 315, Retreat, Rendezvous, Envy, Envy II
2008 Models: All Marquis spa models
Not sure if your model made the list? Check the chip number sticker near the center of your existing board first—it's the most reliable way to confirm compatibility, regardless of your spa's model year.
Technical Specifications
Spec
Detail
Platform
VS501Z – Balboa Value Series
Technology
Balboa M7 (no pressure switch required)
Pump 1 Output
2-speed
Pump 2 Output
1-speed
Spa Light
12V
Ozonator
Supported
Topside Connection
8-pin phone cable
Housing
Plastic control box (Balboa 54342)
Condition
New, factory-original
Warranty
1-year limited manufacturer's warranty
Please note: exact board dimensions and shipping weight vary slightly by production batch. Give us a call or check our online catalogue for the most current measurements before you order.
Common Questions
How do I know if this is the right board for my spa?
Check the white chip sticker near the center of your existing circuit board. If it reads LZM1UR1, LZM2UR1A, LZM2UR1B, or LZM2UR1C, this board is a match. Your spa's model and year should also fall within our compatibility list above.
What if I can't find the chip number on my old board?
No problem—send us clear photos of your existing board along with your spa's make, model, and serial number, and our team will confirm the correct part for you.
Does this board work with any topside control panel?
This board is confirmed compatible with the 650-0635 topside panel. If your spa uses a different topside, contact us before ordering to confirm fit.
Is this board new or refurbished?
This is a brand-new, factory-original board that has never been installed.
Can I return this part if it doesn't fit?
Circuit boards are non-returnable once purchased, so please confirm your chip number, spa model, and year with our team before placing your order.
Do I need an electrician to install this?
Yes. Installation should be performed by a licensed electrician in compliance with NEC Article 680 and all applicable local codes, including proper GFCI protection and grounding.
Get the Right Part the First Time
[Shop and Order at Western Tub and Pool]
Hard-to-find part? Send us an email at fixmytub@gmail.com and our team will help track it down.
As an international e-retailer, Western Tub and Pool sources parts from warehouses across multiple regions, which can affect shipping times. To help you identify where your part ships from, we've added regional suffixes to our part numbers: U for U.S.A., C for Canada, E for Europe, and A for Asia. Because of this, you may see what looks like a duplicate listing for the same part—this simply reflects a different regional warehouse.
If you already know your part number, double-check it against the listing before ordering. If you're not sure, send us pictures of the part along with your hot tub's make, model, and serial number, and we'll help you find the exact match.](https://cdn11.bigcommerce.com/s-b7yzllubsu/images/stencil/500x659/products/4575/6853/600-6293__28394.1789504002.PNG?c=2 "Marquis LZM2UR1B Circuit Board 600-6293 – Genuine Replacement Spa Pack Board
Restore your Marquis spa to full working order with the 600-6293 circuit board, the OEM Balboa-manufactured replacement for 2006-2008 Marquis models. If your control panel isn't responding, your pumps won't kick in, or your spa is throwing error codes, a failing circuit board is often the culprit—and this board is the exact fix your system needs.
[Shop and Order at Western Tub and Pool]
Why This Board Is the Right Fix
Genuine OEM Quality: Manufactured by Balboa for Marquis spa systems, this is a brand-new, factory-original board—not a generic aftermarket substitute.
No Pressure Switch Needed: Built on the VS501Z platform with Balboa's M7 technology, this board handles temperature and water flow sensing without a separate pressure switch, meaning fewer parts to fail down the line.
Full-Function Control: Runs your 2-speed primary pump, 1-speed secondary pump, 12V spa light, and ozonator, so every feature of your spa stays operational.
Confirmed Compatibility: Covers a wide range of 2006 and 2007 Marquis models, plus every 2008 Marquis spa, so there's a strong chance this is the exact board your tub needs.
Direct Upgrade Path: This board replaces the older 600-6288, so if your spa used that part, 600-6293 is your drop-in solution.
Cross-Reference & Compatible Part Numbers
Use this table to confirm you're ordering the right part:
Reference Type
Number(s)
Marquis Part Number
600-6293 (also listed as MRQ600-6293)
Chip Number
LZM2UR1B (also covers LZM1UR1, LZM2UR1A, LZM2UR1C)
Balboa Part Number
54343 / 54343-01
Control Box Number
54342 (plastic enclosure)
Replaces
600-6288
Compatible Topside Panel
650-0635
Associated repair parts to check alongside this board include the 54342 plastic control box and the 650-0635 topside control panel—both work directly with this system.
Hot Tubs & Models That Use This Circuit Board
2006 Models: Quest, Ult630, Ult530, Ult418, Ult315, 630, 530, 418, 315, Retreat, Rendezvous
2007 Models: Quest, 641R, 520M, 744E, 319S, Ult630, Ult530, Ult418, Ult315, 630, 530, 418, 315, Retreat, Rendezvous, Envy, Envy II
2008 Models: All Marquis spa models
Not sure if your model made the list? Check the chip number sticker near the center of your existing board first—it's the most reliable way to confirm compatibility, regardless of your spa's model year.
Technical Specifications
Spec
Detail
Platform
VS501Z – Balboa Value Series
Technology
Balboa M7 (no pressure switch required)
Pump 1 Output
2-speed
Pump 2 Output
1-speed
Spa Light
12V
Ozonator
Supported
Topside Connection
8-pin phone cable
Housing
Plastic control box (Balboa 54342)
Condition
New, factory-original
Warranty
1-year limited manufacturer's warranty
Please note: exact board dimensions and shipping weight vary slightly by production batch. Give us a call or check our online catalogue for the most current measurements before you order.
Common Questions
How do I know if this is the right board for my spa?
Check the white chip sticker near the center of your existing circuit board. If it reads LZM1UR1, LZM2UR1A, LZM2UR1B, or LZM2UR1C, this board is a match. Your spa's model and year should also fall within our compatibility list above.
What if I can't find the chip number on my old board?
No problem—send us clear photos of your existing board along with your spa's make, model, and serial number, and our team will confirm the correct part for you.
Does this board work with any topside control panel?
This board is confirmed compatible with the 650-0635 topside panel. If your spa uses a different topside, contact us before ordering to confirm fit.
Is this board new or refurbished?
This is a brand-new, factory-original board that has never been installed.
Can I return this part if it doesn't fit?
Circuit boards are non-returnable once purchased, so please confirm your chip number, spa model, and year with our team before placing your order.
Do I need an electrician to install this?
Yes. Installation should be performed by a licensed electrician in compliance with NEC Article 680 and all applicable local codes, including proper GFCI protection and grounding.
Get the Right Part the First Time
[Shop and Order at Western Tub and Pool]
Hard-to-find part? Send us an email at fixmytub@gmail.com and our team will help track it down.
As an international e-retailer, Western Tub and Pool sources parts from warehouses across multiple regions, which can affect shipping times. To help you identify where your part ships from, we've added regional suffixes to our part numbers: U for U.S.A., C for Canada, E for Europe, and A for Asia. Because of this, you may see what looks like a duplicate listing for the same part—this simply reflects a different regional warehouse.
If you already know your part number, double-check it against the listing before ordering. If you're not sure, send us pictures of the part along with your hot tub's make, model, and serial number, and we'll help you find the exact match.")
