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Balboa 51089 Circuit Board MTSIR1(x) Alt Repl, Marquis Spa 600-6219

Balboa 51089 Circuit Board MTSIR1(x) Alt Repl, Marquis Spa 600-6219
  • Manufactured by: Balboa Water Group, Inc.
  • Part Number: 51089
  • Chip Number: MTSIR1(x)


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Item Number: 22-7817

  • Description
  • Details
  • Reviews

The Balboa 51089 MTSIR1(x) circuit board is discontinued but we have options.

Option 1: Scroll down to RELATED PRODUCTS for other replacement options.

Option 2: Get your circuit board repaired.  Please contact us before sending items in for repair.

Option 3: Contact us to inquire about a new retro-fit system control box replacement.

The Balboa 51089 MTSIR1(x) circuit boards are also found in hot tubs made by Marquis under the part numbers 600-6219, M600-6219, M6006219, 6006219.
Cross Reference Verification
Serial Numbers:
  • 51089
  • BAL51089

Chip Numbers:
  • MTSIR1A
  • MTSIR1B
  • MTSIR1C
  • MTSIR1D
  • MTSIR1E
  • MTSIR1F
Additional Cross Ref., Compatibility & Installation
ATTENTION: This alterante replacement circuit board does not support more than one topside control panel..

ATTENTION: This alternate replacement comes with a new overlay sticker to relabel the buttons on your existing control panel too reflect the button order after installing this alternate circuit board.
Tip: When replacing a hot tub circuit board, testing the heater and replacing it (if bad), is recommended before installing or applying voltage on a new circuit board.
Note: A continuity test is not a sufficient heater test. Contact us by phone for more details on testing a heater.

Tip: Burned circuit boards or burned heater relays are often due to a loose electrical connection or a bad heater or both.
If all connections are tight and if the heater is good then the heater relays are probably old and worn out.
If a burned relay was powering a pump and all electrical connections are tight then the relay is probably old and worn out or the pump might be bad or going bad or all three.
Replacing the heater and/or pump with a new one is recommended if any of those scenarios apply.

Tip: See RELATED PRODUCTS below for more Balboa 51089 MTSIR1(x) replacement options.

Unsure of what something on this page means?

Please contact us so we can better assist you.


  • Manufactured by: Balboa Water Group, Inc.
  • Part Number: 51089
  • Part Number: MTSIR1(x)
  • Item Number: 22-7817


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