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Master Spa – Heaters and Replacement Parts

As the #1 supplier of Master Spa replacement parts, we have a huge selection of original OEM Master Spa heaters and hot tub heater replacement parts, including Master Spa heaters, Master Spa heater straps, Master Spa temperature sensors, and more. Most orders ship same-day, and we offer free shipping on all orders over $99 in the U.S. If you are unsure about which heater part you need for your spa, compare the first five numbers on your heater (located under the barcode) to the V/N number on our website.

If you need additional assistance, you can always call our Customer Service team at (855) 308-2149. We’re happy to help!

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    Ozone Photo Sensor 

    Ozone Photo Sensor
    $28.74
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    Designed specifically for 2015 Michael Phelps Swim Spas this sensor is a replacement for the sensor in your spa’s heating system allowing you to control the heat of your spa from the external control panel. If you don’t see your model listed, it may still work – so please give our customer service a call!

    Sensor w/ 25' cord
    $47.03
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    Designed specifically for the Legend Series Master Spas and the Michael Phelps Swim Spas starting with the 2014 model, the Temperature Sensor Mount is a replacement part that will fit the temperature sensor (SKU : 801821). If you don’t see your model listed, it may still work – so please give our customer service a call!

    Temp Sensor Mount
    $40.39
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    The pressure switch in your spa controls the water pressure in your spa. The pressure switch harness is a replacement part for the original pressure switch harness that allows the pressure switch to be connected to the controls of your spa.

    Pressure Switch Harness
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    Temperature Sensor Mount. Used in older style Master Spas to secure the flow sensor to the spa. A new mount should always be installed when you are replacing your spa sensor unit.

    This mount should fit with most sensors.

    Temperature Sensor Mount
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    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.

    Pressure Switch - MAS400
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    The 4.0kW Heater (V/N 50143) is a replacement part for selected models of the Down East Spas and Legend Series Master Spas

    Easily installable so you can get back to enjoying your heated Swim spa and hot tub in no time at all.

    4.0kW Heater (V/N 50143)
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    The sensor assembly is specifically designed to go with Down East Spas and Legend Series Master Spas (select 1996-1999 models). It is a replacement for Balboa Dual Sensor Assembly with Temperature and Hi-Limit Sensor. Compatible with all Balboa systems that use this type of sensor.

    Sensor Assembly
    $81.21
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    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:

    5.5 kW Heater  with pressure switch for Master Spas
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    This product is a pressure switch assembly specifically designed to go with select Down East and Legend Series Master Spas. If you don’t see your model listed, it may still work – so please give our customer service a call!

    Pressure Switch Assembly.
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    Copper Heater Straps are used for connection of the Heater Unit of your spa to the Board within the Spa pack.

    Easily installed.

    Copper Heater Straps
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    The 4.0kW Heater (V/N 55950) is a replacement part for selected models of the H2X Swim Spas (Momentum 80, H2X Momentum) and Michael Phelps Swim Spas (Momentum 80)

    Easily installable so you can get back to enjoying your heated Swim spa and hot tub in no time at all.

    4.0 kW Heater (V/N 55950)
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