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Thread: AO Smith Motor Is Humming and Wont Start

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    AO Smith Motor Is Humming and Wont Start

    Hi All,

    I have a Starite pump with an AO smith Motor C48K2PA105C5 1 hp. I tried to get it going and it just hums. I figure it rusted up over the winter and I could not reach the impeller to move it along. Does anyone have any tricks to try and save the motor?

    Thank you in advance for the help

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    Texas Splash's Avatar
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    Re: AO Smith Motor Is Humming and Wont Start

    With power disconnected, see if you can get to the back and turn the motor from there to break it free. You might have a cover in the way, but then might be able to get a wrench or socket on the motor's shaft to spin it a few times.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
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    Re: AO Smith Motor Is Humming and Wont Start

    Can you access the rear of your motor and attempt to spin motor shaft with a 1/2 wrench? This will help identify if your motor is truly seized. Next check your capacitor located on top of motor. Do a thread search for "motor humming"
    Someone will be along to give you more information soon.

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    Re: AO Smith Motor Is Humming and Wont Start

    I was hoping it had access to the shaft but its blocked. Can I remove the contacts to get at it?


    pump motor.jpg

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    Texas Splash's Avatar
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    Re: AO Smith Motor Is Humming and Wont Start

    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
    If you enjoyed your TFP experience, please consider donating to Support TFP!

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    mas985's Avatar
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    Re: AO Smith Motor Is Humming and Wont Start

    Just try to turn the governor (silver piece with the springs). It is attached to the motor shaft.
    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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    Texas Splash's Avatar
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    Re: AO Smith Motor Is Humming and Wont Start

    lilhall, any luck getting to that motor shaft? Are you able to salvage that motor?
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
    If you enjoyed your TFP experience, please consider donating to Support TFP!

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    Re: AO Smith Motor Is Humming and Wont Start

    Hi All,

    Thank you for the help, I was worried that I was going to break the spring but your suggestions worked. The pump motor is back in service.

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    mas985's Avatar
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    Re: AO Smith Motor Is Humming and Wont Start

    That usually means the bearings are starting to go so you might want to prepare yourself for a motor change at some point.
    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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    Texas Splash's Avatar
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    Re: AO Smith Motor Is Humming and Wont Start

    Good to hear you are operational again.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
    If you enjoyed your TFP experience, please consider donating to Support TFP!

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