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Thread: Spa seems only to heat when jets are on

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    Join Date
    Apr 2016
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    Maryville Tn
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    Spa seems only to heat when jets are on

    I replaced the heater last year. Worked fine till late fall. Wouldn't heat so i replaced the temperature and Hi limit sensors. Now it seems to only heat when the jets are on. Please help me if you can.
    D2000 Dynasty Spa
    Balboa heater and circuit board

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    Apr 2016
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    Maryville Tn
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    Re: Spa seems only to heat when jets are on

    Replaced the filter too
    D2000 Dynasty Spa
    Balboa heater and circuit board

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    Re: Spa seems only to heat when jets are on

    D2000 Dynasty Spa
    Balboa heater and circuit board

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    Mod Squad pooldv's Avatar
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    Re: Spa seems only to heat when jets are on

    Welcome to TFP!

    I'm not sure I understand. The pump has to be running for the heater to have water flow to heat. Are there 2 pumps?
    TFP Moderator
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    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

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    Re: Spa seems only to heat when jets are on

    Well the spa should be heating while circulating (low speed) However it only heats when the jests are on. (High speed)

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    mas985's Avatar
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    Re: Spa seems only to heat when jets are on

    Quote Originally Posted by Homilist View Post
    I replaced the heater last year. Worked fine till late fall. Wouldn't heat so i replaced the temperature and Hi limit sensors. Now it seems to only heat when the jets are on. Please help me if you can.
    It sounds like a problem with the pressure sensor. Does the heater have an error on the readout when this happens?
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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    Apr 2016
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    Re: Spa seems only to heat when jets are on

    Replaced the sensors and the pressure switch. When i replaced the pressure switch it seemed to fix the problem. Then had to replace a cracked piece on the pump housing. Then the problem with the heat returned. No error messages.

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