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Thread: MasterTemp 400 Not Maintaining Stable Temperature

  1. Back To Top    #1

    Join Date
    Sep 2008
    Location
    Melbourne, FL
    Posts
    141

    MasterTemp 400 Not Maintaining Stable Temperature

    A temperature issue just cropped up on my MasterTemp 400. It will heat up fine to the desired temperature ... usually 98-100 degrees; but as the spa cools down, the heater doesn't fire back up until the spa temp drops down to 94-95. Is there a way that I can keep the temperature range tighter?

    Thanks!
    Karl

    Freeform 15x31 Pool w/ oversized spa, 1 1/2 HP Blower, Pentair Quad 60 DE Filter, Heliocol solar panels, Pentair Maxitherm 400K BTU heater, Pentair IC40 SWG, Pentair Easytouch 4 w/wireless remote, Pentair IntelliFlow VSP, and Pentair Intellibrite LED Pool/Spa lights.

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    Patrick_B's Avatar
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    Jun 2011
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    Midland TX
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    14,999

    Re: MasterTemp 400 Not Maintaining Stable Temperature

    I don't know, but it sounds like a design criteria. I'm giving you a bump here in hopes that one of our members will see this, and get you an answer. There's a few who will know for sure.

    TFP Moderator
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  3. Back To Top    #3

    Join Date
    Sep 2008
    Location
    Melbourne, FL
    Posts
    141

    Re: MasterTemp 400 Not Maintaining Stable Temperature

    Thanks for that Patrick ... I may just end up contacting Pentair directly to see what they have to say

    Karl

    Karl

    Freeform 15x31 Pool w/ oversized spa, 1 1/2 HP Blower, Pentair Quad 60 DE Filter, Heliocol solar panels, Pentair Maxitherm 400K BTU heater, Pentair IC40 SWG, Pentair Easytouch 4 w/wireless remote, Pentair IntelliFlow VSP, and Pentair Intellibrite LED Pool/Spa lights.

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