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Marquis Spas MQ2KU circuit board 600-6298 (Balboa 54278)

Marquis Spas MQ2KU Circuit Board (2009–2010) – OEM Replacement

$987.77

Fits:
Marquis Signature Series Epic and Show spas (2009–2010)

Common Symptoms:
• No heat or no power to pumps
• Topside blank or not responding
• Burnt or melted connectors on the board
• Error codes that return after a reset

Compatibility:
Replacement Balboa circuit board for Marquis EP2-MQ2KU control systems. Also works in place of the 600-6292 board once the dip switches are changed. Match the board number or chip on your old board before ordering.

Not sure?
Send us a photo of your old board and we’ll confirm compatibility.

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Marquis Spas MQ2KU Circuit Board (2009–2010) – OEM Replacement

This is the replacement main circuit board for Marquis Signature Series Epic and Show spas built in 2009–2010. It’s the Balboa-built EP2-MQ2KU board that runs the heater, pumps, sensors and topside on those spas.

Circuit boards are exact-match parts. Two Marquis boards can look the same and still be set up differently, so match the numbers on your old board, not the photo.

Compatibility & Installation

  • Fits Marquis Signature Series Epic and Show spas (2009–2010)
  • Board: Marquis EP2-MQ2KU EL2 M3 MTS R3E
  • Chip: MQKUR2E2
  • Balboa number: 54278
  • Dip switch setup: on this board, switches #3, #5 and #7 are UP and all others are DOWN. Before you remove your old board, take a photo of its dip switches so you can compare.

Setup note: Marquis 600-6292 and 600-6298 are the same circuit board with different dip switch settings. On 600-6292, switches #3 and #8 are up and all others are down. On 600-6298, switches #3, #5 and #7 are up and all others are down.

Before you start: turn off power at the breaker. Board replacement involves 240V wiring; if you’re not comfortable working inside the spa pack, hire a qualified spa technician.

Common Symptoms of a Failing Board

  • No heat, or the heater won’t come on
  • Pumps or lights won’t turn on
  • Topside is blank or doesn’t respond
  • Burnt, discolored or melted connectors on the board
  • Error codes that keep coming back after a reset

Some of these symptoms can also come from a bad topside, sensor or heater, so check those before replacing the board.

Replacement Information

Replaces Marquis board 600-6298 (Balboa 54278, EP2-MQ2KU). Also replaces Marquis 600-6292. It’s the same board, so 600-6292 owners can use it: set dip switches #3 and #8 up and all others down before installing.

Shipping

Ships directly from our spa controls distributor, usually within 1–2 business days. Orders over $99 ship free in the lower 48.

More Marquis parts: Marquis Spa Circuit Boards | All Marquis Spa Parts | Marquis Spa Filters | Balboa Circuit Boards

*Manufacturer reserves the right to make production changes. Actual product received may vary slightly in appearance but the function remains the same.

✅ Not Sure It Fits? Verify Before Ordering

Marquis circuit boards vary by model, year, and dip switch setup. Boards that look the same can be set up for different spas.

To help us identify the correct replacement, please send clear photos of:

  • Your old circuit board, including any label, chip, and dip switches
  • Your spa serial number sticker
  • Your spa pack / control system label

EZ Hot Tub Parts can help confirm fitment before you order and help reduce costly returns.


Marquis MQ2KU Circuit Board FAQs

It fits Marquis Signature Series Epic and Show spas from 2009–2010 that use the EP2-MQ2KU board. Match the number on your old board (600-6298 or 600-6292, Balboa 54278, or chip MQKUR2E2). If you can’t read it, send us photos through the fit-check form above.

They are the same circuit board with different dip switch settings, so this board works for either one. On 600-6298, switches #3, #5 and #7 are up. If your old board is 600-6292, change the switches so #3 and #8 are up. All other switches are down on both.

Common signs are no heat, pumps or lights that won’t turn on, a blank topside, burnt connectors on the board, or error codes that return after a reset. A bad topside, sensor or heater can cause some of the same problems, so rule those out first.

Yes, check them before you install the board. Take a photo of the dip switches on your old board before you remove it, then compare it with the new board.

Many owners do, but it involves 240V wiring inside the spa pack. Turn off power at the breaker first. If you’re not comfortable with electrical work, hire a qualified spa technician.

Yes. Marquis used Balboa-built control systems on these spas. This board is Balboa number 54278.

It ships directly from our spa controls distributor, usually within 1–2 business days. Orders over $99 ship free in the lower 48.

600-6298 6006298 MRQ600-6298 54278 MQ2KU MQKUR2E2 EP2-MQ2KU E2P-MQ2KU 600-6292 marquis spa circuit board marquis epic marquis show signature series

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