The Balboa 53858-04 circuit board is used to replace the PCBs (printed circuit board) in the EL8000 control systems used by various hot tub manufacturers, including QCA Spas and Catalina Spas.

Important:
Finding the right PCB replacement requires knowing the chip number because some have the same appearance but work differently. This is written on a white label that is attached to the circuit board.

Fitment Guidelines:

Circuit Board for the Balboa 55064 Spa Pack
Compatible with the Balboa 53605 M7 Sensors and Balboa's ML900 control panels

Replacement circuit board for the following:
•  53231-02 Master Spas
•  53232-01R1B
•  52888-01 Catalina Spas
•  52888-01
•  53858-03
•  951210
•  9710-105
•  EL8000 Mach 2
•  EL8000R1A

Additional Information:

Cord Type - Molex Cable
Chip Number - EL8000R1A