Balboa PCB – 54516 GS501SZ Spa Pack
This circuit board is a genuine Balboa replacement for boards labeled 54516 fitted to plastic Balboa GS501SZ spa control packs.
The GS501SZ PCB’s are compatible with the Balboa’s High end VL range of topside controls.
The PCB should be fitted with all the dip switch settings the same as the faulty PCB being replaced. For correct installation, the PCB should be fitted by a qualified tradesman or electrician.