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Balboa 52000 Circuit Board MAS25R1(x), Master Spas X800660

Balboa 52000 Circuit Board MAS25R1(x), Master Spas X800660
  • Manufactured by: Balboa Water Group, Inc.
  • Part Number: 52000
  • Chip Number: MAS25R1(x)

$212.16



Item Number: 22-7425

  • Description
  • Details
  • Reviews
Please read entire page before placing an order.

This new OEM circuit board is for replacing Balboa 52000 circuit boards having a MAS25R1(x) chip number.

The Balboa 52000 MAS25R1(x) circuit boards are also found in hot tubs made by Master Spas, Inc. under the part number X800660.

Tip: The "(x)" shown above is shorthand for a range of last letters on MAS25R1 chip numbers this circuit board can replace.

Please note: A list of chip numbers this circuit board can replace is specified in the CROSS REFERENCE VERIFICATION section below.

Please Note: The numbers on the new circuit board you receive may be different and the components may look slightly different but it will still connect the same and it is a fully compatible OEM replacement , unless specified otherwise in the ADDITIONAL CROSS REF., COMPATIBILITY & INSTALLATION section below.

Cross Reference Verification
Step 1 of 2:
Tip: Locate the serial number on the old circuit board being replaced.
Tip: The serial number is on a sticker on the old circuit board (not the box).
Tip: The serial number is shown on the sticker preceded by S/N or P/N (part number).
Tip: The image above shows an example of a serial number sticker (click image to enlarge it).

Verify the serial number on the old circuit board being replaced is in this list.

Serial Numbers:
  • 52000
  • BAL52000

Step 2 of 2:
Tip: Locate the chip number on the circuit board you are replacing.
Tip: The whole chip number is on a sticker located on the circuit board (not the box).
Tip: This is a different sticker than the serial number sticker.
Tip: The chip number sticker usually has two lines of text and the top line is the whole chip number (the bottom line is not needed).
Tip: See image above for an example of a chip number sticker and where they're typically found on the circuit board (click the image to enlarge it).

Verify the chip number on the circuit board being replaced placed is in this list.

Chip Numbers:
  • MAS25R1A
  • MAS25R1B
  • MAS25R1C
Additional Cross Ref., Compatibility & Installation
These new OEM circuit boards now connect the pumps to terminal spades on the circuit board, not the relays.

Locate the terminal spade on the circuit board labeled J39.
Connect Pump-1 high speed (red wire) and Pump-2 (red wire) to J39 on the circuit board.
Tip: previously these wiree connected to a relay, but now they connect to J39 on the circuit board.

Locate the terminal spade on the circuit board labelled J35.
Connect Pump-1 low speed (black wire) to J35
Tip: previously this wire connected to a relay, but now it connects to J35 on the circuit board.

Locate the terminal spade on the circuit board labelled J3.
Now locate the fuse block mounted on the inside of the box.
This fuse block has black wires on each side of it.
One black wire goes to the power input terminal block in the black posistion and it will remain as is.
The other black wire on the other side of the fuse block connects to J3 on the circuit board.
Tip: previously this wire connected to a relay, but now it connects to J39 on the circuit board.)

Locate jumper pin on the circuit board labelled J21.
Put the jumper sleeve on two pins
For topside control panels (keypad) with 2 or 3 buttons, put the jumper sleeve on two pins.
For topside control panels (keypad) with 4 buttons, put the jumper sleeve on one pin.
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.

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: 52000
  • Part Number: MAS25R1(x)
  • Item Number: 22-7425


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