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When it comes time to replace your circuit board and return function to your spa's lighting, jet pumps, and high-limit sensors, we've got you covered. Master Spa Parts has numerous legacy Whirlpool® replacement circuit boards in stock, including this MAS520 PC Board (V/N 54357).

Are you ready for the good news? This legacy Whirlpool® circuit board replacement for MAS520 ships fast and with free shipping to all addresses in the Continental United States.

Spa circuit boards play a part in nearly every essential function of your spa or hot tub, everything from jets and temperature controls, to the safety switch-offs and lighting. So, when a board fails, you will likely see decreased function right away. Master Spa Parts aims to stock common and rare types of replacement circuit boards, including this MS2000 PC Board (V/N 52959) for Down East Spas and other brands.

If you're located in the Lower 48, you can also take us up on our free shipping offer on this printed circuit board replacement for MS2000 and many others found in our online store.

The Waterfall Diverter Valve, 1/2" 3-WAY GREY by Master Spas is a replacement part for your home spa’s original waterfall diverter valve. The water diverter valves in your spa allow you to control when and where water flows. The Waterfall Diverter Valve, 1/2" 3-WAY GREY is durable, affordable and easy to install at home.

If all of the sudden, you find your spa's jet pumps, filters, jets, or water temperature stability begin to fail all at once, there's a good chance it may be due to the circuit board.

When you check out our online store, you'll find the Master Spas® 501X daughter pc board from Master Spas® and many other economical spa circuit boards. You can expect fast and free shipping options when you purchase this Momentum 80 circuit board replacement from the Master Spa Parts online store. 

The pressure switch - MAS400 - is specifically designed to replace the original pressure switches in the Legend Series Master Spas 2000 CS models. Control the water pressure in your spa with the right part.

Keep your water hardness levels on track and avoid spa corrosion with Spa Ease Liquid Calcium.

This heater is a replacement part for the original heater in your Master Spas swim spa and hot tub models. Easily installable so you can get back to enjoying your heated Swim spa and hot tub in no time at all.

This is an original heater assembly made by Balboa Group - leaders in manufacturing spa parts.

Features:

Get rid of excess foam in your hot tub quickly and prevent foam from ruining your enjoyment and relaxation! SpaBoss Defoamer is safe to use even if you’re in the hot tub at the same time.

The Black Wrap Around Master Spas Pillow will nicely replace your original hot tub pillow for certain Down East Master Spa hot tubs (2003-2009).

This is the Locking Ring replacement part sold by Master Spa Parts. It is important to keep all of the elements for water filtration working in order to ensure crystal-clear water in your home spa – and this locking ring does just that. This replacement part is a component within the filter housing.

The Master Spa’s Grey Pop-up Speaker is a replacement for the speakers on your Master Spa series. Enjoy masterful sound as if you the band was playing right near your tub.

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.