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Thread: Pentair heater and controller question

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    Pentair heater and controller question

    I've got a pentair minimax heater and i7 controller.

    It seems that when I hit the "spa" button, the heater fires up and reaches or exceeds the target temperature. As the water starts to cool, the heater does not readily fire up again.

    I was told by Pentair that it is normal for the heater not to fire up until the temp falls 3-4 degrees below the target, but this seems excessive.

    Anyone with advice about what might be the issue here?


    - Jeff
    15,000 gal SWG pool, cartridge filter, all pentair equipment, variable speed pump, 400K BTU heater and spa, pebbletec finished

  2. Back To Top    #2

    Join Date
    Jul 2008
    Hamilton, Ontario, Canada

    Re: Pentair heater and controller question

    Don't know too much about this but an engineer recently told me that the "thermo couple" in the units have an internal range that triggers when the heater goes on and off. Perhaps there is flexibility to adjust this range to allow you to lessen the range so it fires up/shut down sooner. Or you could research that to see if anyone out there has any tips on that.
    Vince G
    InGd 22' x 36' Lagoon, Vinyl,
    Pentair Easy Touch 4, Intellichlor 40 SWGS,
    Sta-Rite 3/4 hp Max E high head single speed pump,
    Sta-Rite Max E Therm 333K BTU Heater,
    Sta-Rite Mod 3 Cartrige Filter, Hayward Navigator Cleaner
    18 K Gallons/81 K litres, 2 Skimmers, main drain, 3' - 8' deep w DBoard

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