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Thread: Trouble with heating spa with Master Temp

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    Join Date
    Apr 2015
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    San Dimas,California
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    Unhappy Trouble with heating spa with Master Temp

    When I turn on heater and press heat spa button heater ignites the temp stays at 71 but does not heat spa?

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    Patrick_B's Avatar
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    Jun 2011
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    Midland TX
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    Re: Trouble with heating spa

    We need more information. Like what sort of equipment you have. I just saw our other post where it only says Master Temp as your heater type. Please add the specifics here.

    I am going to delete the other thread as there is nothing in it to go on. Please ask and fill in your equipment details using this thread.
    TFP Moderator
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    Apr 2015
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    Re: Trouble with heating spa

    Listed more information in my signature.
    In ground pool+ spa(35,000 gallons).Pentair "Clean & Clear cartridge filter system.
    Pentair "easy touch"controllsystem
    Pentair Intelliflo VS-3050 variable speed pump.
    Pentair MasterTemp 400 natural gas heater.

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    JasonLion's Avatar
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    May 2007
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    Silver Spring, MD
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    Re: Trouble with heating spa with Master Temp

    I assume you have set the heater so it's target temperature is higher than 71 degrees?

    Do you have a heater bypass? If there is a bypass and it is currently setup to bypass the heater, that would prevent the heater from working correctly.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Join Date
    Apr 2015
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    San Dimas,California
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    Re: Trouble with heating spa with Master Temp

    What does a heater bypass look like,is it equipment connected to my heater or is it like a computer command I could have accidently initiated from controll panel?
    In ground pool+ spa(35,000 gallons).Pentair "Clean & Clear cartridge filter system.
    Pentair "easy touch"controllsystem
    Pentair Intelliflo VS-3050 variable speed pump.
    Pentair MasterTemp 400 natural gas heater.

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    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Trouble with heating spa with Master Temp

    A heater bypass is plumbing external to the heater which can be set (with a valve) to route water through the heater or past the heater. If you are unsure a photo of the plumbing connected to the heater would make it very clear.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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