Maax Spa Circuit Board
Chip Number: MX504SZR1A Also known as (107-961)
Control Box Number: 55257
Board Number: 55258
- Original Maax circuit board price = $395.00 (special order). You will receive the alternate board 54638-01 (shown) it is a direct replacement without any issues and is much cheaper.
When installing this board: Make sure that you move all the white wires on the new board in the same location as the old board. Do not add any wires to the board or move any other wires.
It is very important that you do not order a circuit board based on looks, several boards look alike but have different software or chips. It is the chip that drives the board and gives it its unique functions. To correctly identify a circuit board the chip number should be used to identify it. It can be found on a white sticker near the center of the circuit board. Another number that is helpful in identifying a Balboa Water Group circuit board is the five digit number found on most boards (5****).