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.
Made to go with the Legend Series by Master Spas, the MS5000 Pack is an exact replacement for your spa’s original control pack. The control pack is durable, easily installed with the help of an electrician or trained spa technician, and is made to provide you continued enjoyment of your home spa.