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Thread: Pump cycle on and off

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    jorivesud's Avatar
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    Pump cycle on and off

    Hi,

    my pump started to cycle on and off 2 days ago. Only happened during the very hot period of the day.
    I openned the shed door, turned off the breaker for 15-20 minutes and it seemed tombe ok after that.
    But, this morning it's not that warm and it started to do it again.
    I'm pretty sure it's over heating, but what should I check to see what can cause this?
    The pump is only on it's 3rd season (Hayward Super Pump II, 2 speed, 1hp).

    thanks.
    12x20 vinyl liner + fiberglass steps. (6800 Gallons)
    SWCG - Hayward Salt&Swim 3C
    Hayward XStream Cartridge Filter (200 SQ.FT)
    Hayward TriStar VSP
    Raypak heat pump, Taylor K-2006 test kit.

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    mas985's Avatar
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    Re: Pump cycle on and off

    Usually, that is due to bad bearings but it can also be due to something stuck in the impeller. Has the pump been leaking or does make any loud noises?

    Check the impeller for any blockage first.
    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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    jorivesud's Avatar
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    Re: Pump cycle on and off

    Quote Originally Posted by mas985 View Post
    Usually, that is due to bad bearings but it can also be due to something stuck in the impeller. Has the pump been leaking or does make any loud noises?

    Check the impeller for any blockage first.
    Pump is running fine when running, no unusual noise. Impeller seems fine.
    I did improve ventilation around the pump to see if it will go away, but odd that I did not see this in the previous season.
    Anything else I could look at?

    - - - Updated - - -

    By the way, it did not stop since I improved ventilation. But, today is not as hot as the last 3 days either.
    12x20 vinyl liner + fiberglass steps. (6800 Gallons)
    SWCG - Hayward Salt&Swim 3C
    Hayward XStream Cartridge Filter (200 SQ.FT)
    Hayward TriStar VSP
    Raypak heat pump, Taylor K-2006 test kit.

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    Santa Ana, CA
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    Re: Pump cycle on and off

    Quote Originally Posted by jorivesud View Post
    Hi,

    my pump started to cycle on and off 2 days ago. Only happened during the very hot period of the day.
    I openned the shed door, turned off the breaker for 15-20 minutes and it seemed tombe ok after that.
    But, this morning it's not that warm and it started to do it again.
    I'm pretty sure it's over heating, but what should I check to see what can cause this?
    The pump is only on it's 3rd season (Hayward Super Pump II, 2 speed, 1hp).

    thanks.
    can you post a pic of your pump motor shield/sticker?
    Does it actually get hot?
    Does it do this on both speeds?
    44k plaster pool, Pentair 011018 pump, DE6020 filter, LED lights, K2006 test kit

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    mas985's Avatar
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    Re: Pump cycle on and off

    By the way, it did not stop since I improved ventilation. But, today is not as hot as the last 3 days either.
    That could have fixed the problem.
    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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    Join Date
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    Re: Pump cycle on and off

    Quote Originally Posted by mas985 View Post
    That could have fixed the problem.
    I have a feeling it will return next year or this particular type is prone to overheating?
    Or it didn't have any ventilation in the first place so any improvement would make those conditions normal?
    44k plaster pool, Pentair 011018 pump, DE6020 filter, LED lights, K2006 test kit

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    mas985's Avatar
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    Re: Pump cycle on and off

    Or it didn't have any ventilation in the first place so any improvement would make those conditions normal?
    Right! It was probably marginal. But time will tell.
    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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    jorivesud's Avatar
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    Re: Pump cycle on and off

    Quote Originally Posted by max2k View Post
    can you post a pic of your pump motor shield/sticker?
    Does it actually get hot?
    Does it do this on both speeds?
    yes, it did get hot.
    it does not seem to be as prone at low speed, but I tipically run low speed at night. I did run low speed after 15 minute cooling/breaker off and seems better but not sure if it was the cooling time or speed setting.

    The cooling is now now much better(drilled holes in shed letting the hot air from pup going out of the shed), but did not have to do that in the previous years. As some said, maybe it was marginal and better ventilation will help.
    we are supposed to get hot weather for a few days again this week, so I will see if it happens again.

    for pictures, it will have to wait for tomorrow, it's too dark now.
    12x20 vinyl liner + fiberglass steps. (6800 Gallons)
    SWCG - Hayward Salt&Swim 3C
    Hayward XStream Cartridge Filter (200 SQ.FT)
    Hayward TriStar VSP
    Raypak heat pump, Taylor K-2006 test kit.

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