The Balboa Circuit Board for VS501SZ System (54378-03) is a direct replacement control board from Balboa Water Group, built for VS501S and VS501SZ control boxes.

Specifications:

• Part number: 54378-03
• Used in VS501S and VS501SZ control boxes
• Also known as: 54378-01, 54378-02, VS501SZRD2, VS501SZR1A
• Manufacturer: Balboa Water Group

Fits/replaces:

• Spa systems originally equipped with a Balboa VS501S or VS501SZ circuit board, part 54378-03 (or equivalents 54378-01, 54378-02, VS501SZRD2, VS501SZR1A)

Common signs you need this part:

• Spa won't heat or maintain set temperature
• Error codes displayed on the topside panel
• Pumps or other components fail to respond to commands

Returns & installation: This is an electrical component. Per our terms and conditions, electrical parts are non-returnable once installed. Please confirm your existing part number matches before ordering, and have a qualified technician perform installation.

FAQ

Is this the same as part 54378-01? Yes, 54378-01, 54378-02, VS501SZRD2, and VS501SZR1A are equivalent part numbers for this board.

Which control boxes use this board? VS501S and VS501SZ control boxes.