The Balboa Circuit Board 54638-01 is an OEM replacement for model VS504SZ. This carries a chip number VS504SZR1. This can also work as a replacement for some CS504SZ circuit boards, but the topside’s compatibility must be checked.

• Operates Pump 1-2 Speeds, Pump 2-1 Speed, Standard 12V Light, Ozone and A/V Circuits (No Perimeter Light Circuits)
• Cord Type - 8-pin phone style plug
• Circuit Board Type - New

Note: Finding the appropriate PCB replacement requires knowing the chip number. Some look exactly the same but have different functionality. This is usually printed on a white label attached to the logic chip at the board's center.

Tech tips:
• This circuit board is not plug and play. Arrangement of white wires will need to be moved to the same location as on the original board.
• Heater connection studs must be tight and secure. Failure to secure connection can result in heat/resistance and will burn the board. The manufacturer will not honor the warranty if burned at this connection.

Fitment Guidelines:

Compatible replacement option for the following part numbers:
• Coleman 107-961, 107961, 107-068 or 107068 (Control System)
• 55370-01 (Control System)
• 55372
• 33-0612-08CB
• OP33-0612-08CB (Artesian)
• Chip MX504SZ
• Chip VS504SZR1A
• 54637-01 (System model VSP-VS504SZ-DCAH),
• 55636 (CS504SZ System)
• 55637 (CS504SZER1X)
• 55257 System or 55258 Board (MX504SZR1A; must confirm topside panel compatibility)
• 33-54638-K, 55174, 55173-01 (MVS504SZ)