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Thread: Pump won't run on high

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    Pump won't run on high

    I'm having a similar issue. I have a AO Smith motor that when the pump is switched on it starts humming but won't spin. If I tap on the motor and starts spinning.

    Time to replace motor?


    "In every walk with nature one receives far more than he seeks" -John Muir

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    mas985's Avatar
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    Re: Pump won't run on high

    Welcome to the forum!

    More than likely the start capacitor is bad.
    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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    Re: Pump won't run on high

    Quote Originally Posted by mas985 View Post
    Welcome to the forum!

    More than likely the start capacitor is bad.
    Is that part of the motor?



    This is the best picture I could get bring in the box.

    It is wired 110 now but I'm have a 220 gfci box installed by an electrician next week.


    "In every walk with nature one receives far more than he seeks" -John Muir

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    mas985's Avatar
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    Re: Pump won't run on high

    Yes, it is part of the motor. I think in that motor it is either in the hump on the casing if there is one, or in the back of the motor.
    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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    Re: Pump won't run on high

    Quote Originally Posted by mas985 View Post
    Yes, it is part of the motor. I think in that motor it is either in the hump on the casing if there is one, or in the back of the motor.
    Ok great. I think I'll have the electrician look at when he is here next week.

    Do you think it's safe to run for now?


    "In every walk with nature one receives far more than he seeks" -John Muir

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    mas985's Avatar
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    Re: Pump won't run on high

    Just one other thought. Those symptoms can also be for frozen bearings. After you hit the motor and it starts, if you shut it off and then turn back on, does it start on it's own then?
    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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    Re: Pump won't run on high

    Yes. It seems to only not start after it has set for a few hours.


    "In every walk with nature one receives far more than he seeks" -John Muir

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    mas985's Avatar
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    Re: Pump won't run on high

    Ok, then that is probably the bearings. They can be replaced but you are probably better off with a new motor.
    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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    Re: Pump won't run on high

    It's an 05' model and I'm sure it original pump. Pretty sure I'll just go with a motor.


    "In every walk with nature one receives far more than he seeks" -John Muir

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