The Balboa VS510SZ Circuit Board, part 54372-03, is a replacement control board designed for reliable spa system control and efficient operation.

Specifications:

• Manufacturer: Balboa Water Group
• Circuit board replacement part
• Used in VS510SZ control boxes with M7 technology
• Chip numbers: VS510SZR1 and VS510SZR2 (also replaces 55098)
• Compatible with standard or deluxe control panels
• Does not require a pressure switch or external sensors — uses only the M7 heater-mounted sensors inside the pack
• Part no. 54372-03

** SUPER SALE ** UNTIL QUANTITY LASTS

Returns & installation: Confirm your control box matches this VS510SZ configuration and chip number before ordering, as circuit boards are non-returnable once installed. Have a qualified technician handle installation — this is an electrical safety-critical component.

FAQ

Q: Will this fit my spa's control box?
A: Confirm your control box is a VS510SZ using chip number VS510SZR1, VS510SZR2, or 55098 before ordering.

Q: Do I need a separate pressure switch?
A: No, this board does not require a pressure switch or external sensors — it uses only the M7 heater-mounted sensors inside the pack.