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If you've pinpointed your spa's issue to the circuit board, replacing your board can bring back many essential functions and safety features, such as your lights, heat sensors, high-limit sensors, and jet pumps.

At Master Spa Parts, we're proud to carry a diverse selection of circuit boards, including this Master Spas® circuit board, sold under the product name of "Master Spas® Circuit Board MAS400 PC Board (V/N 52185)" in our online store.

Master Blaster Insert Only Grey/Black

The 108" x 94" Master Spas® replacement hot tub cover (SKU: X454994) is designed to fit your Master Spas® hot tub. This OEM factory hot tub cover comes with a 1. lb foam density, upgraded rubber grip handles and long steam stopper cushions to help prevent heat loss and make it extremely energy efficient!

Note: This cover folds along its longest dimension. 

The Ultralift with Undermount (SKU: 6132032) is a hassle-free cover lifter with an under-mount bracket that easily slides underneath your hot tub. One person can easily lift the hot tub cover on and off from outside or inside of your tub!

SpaBoss Alka Rise boost low alkalinity levels in your spa or hot tub with ease. Prevent pH bounce and damage to your hot tub with this easy to use product.

Large Rotor Clamp

Ozone Flash Reactor

This Master Spa Factory OEM 78” x 78” hot tub cover replacement (SKU: X120240)  is specifically designed to fit your Master Spas® hot tub. This cover is energy efficient as it consists of a 1.5-pound foam density, six-inch thick foam insulation (which tapers to 4-inches along the sides), and a full length heat seal to help prevent heat loss. It is also made of a high end marine-grade vinyl covering that is mildrew treated, and consists of upgraded rubber grip handles.

240V Transformer Balboa Instruments

SpaBoss Energize oxidizing shock treatment and activates bromide salts

Blue Mazzei Ozone Injector (Starting 2011)

White Mazzei Ozone Injector (Starting 2011)