A spa circuit board is the "brains" behind your spa, controlling jet flow, filtration systems, water temperature, as well as the unit's high-limit sensors. Master Spa Parts offers a number of replacement circuit boards.
The .3 Amp Fuse by Master Spas is a durable, affordable replacement fuse made to go in your home spa’s PC board. When it is working correctly, the fuse supplies power to your spa’s control pack so that you can fully enjoy your spa and all of its relaxing features.