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Thread: Pool Heater - What is normal operation supposed to look like

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    Pool Heater - What is normal operation supposed to look like

    Hey guys,

    I'm back with another question, this time my pool heater! It's getting cooler and we're starting to think about heating the pool and using the spa more often.

    When I turn on the spa, the jets blow hot water, then it cools off, then hot water again and this cycle continues. Is this normal operation for a pool heater? The system is currently set for 104 degrees.

    Thanks guys, as always your help is appreciated!

    -Tom Woolley
    -Tom

    17,000 gal plaster with spa. Pentair Clean & Clear cartridge filters. Jandy systems with Aqualink RS and Polaris 360.

    Pool Store free since May 2011!

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    Join Date
    Jun 2011
    Location
    Long Beach, CA
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    2,671

    Re: Pool Heater - What is normal operation supposed to look

    When I run my spa the heater warms the water to the set temperature and then shuts down. The water circulating in the spa starts to cool and once the water gets about 2 degrees below the thermastat the heater kicks in again. Right now with the weather we have it takes about 20 minutes for the water to cool down and then the heater runs for 3-4 minutes.
    16k gal plaster with raised spa, Jandy DEV60 filter, 2 HP 2-speed SHPF Jandy Stealth pump
    Hayward Aqua Rite T-15 SWCG, Jandy LXi 400k BTU NG heater, 350 sq.ft. of Sun Star solar panels, TF-100 Test Kit, Dolphin s300i Cleaner
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    Re: Pool Heater - What is normal operation supposed to look

    Okay, something is causing my heater to cycle on and off for 1-2 minute intervals. I was under the impression that was normal.
    -Tom

    17,000 gal plaster with spa. Pentair Clean & Clear cartridge filters. Jandy systems with Aqualink RS and Polaris 360.

    Pool Store free since May 2011!

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    Re: Pool Heater - What is normal operation supposed to look

    How many gallons is the spa and what size is the heater?

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    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
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    18,768

    Re: Pool Heater - What is normal operation supposed to look

    If you have a lot of aeration, you can cool the water off fast And the heater probably cycles off when it hits target and back on when it drops 3 degrees or so. It could very well be working exactly the way it's supposed to.

    I don't turn on the blower nor the booster pump when I use the spa. And I stick an old yogurt lid over the air intake on the spa jet piping; I'm not heating the water up so I can cool it off right away! It heats faster and stays hot longer with fewer air bubbles in the return stream. By the way, when the pump turns off, the lid is no longer held on by the vacuum created in the venturi, and falls off.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
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    Re: Pool Heater - What is normal operation supposed to look

    No it cycles before the water has even reached close to target temperature. I guess I'm going to have to call the home warranty company again
    -Tom

    17,000 gal plaster with spa. Pentair Clean & Clear cartridge filters. Jandy systems with Aqualink RS and Polaris 360.

    Pool Store free since May 2011!

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