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Thread: pump problem/questions

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    pump problem/questions

    New to TFP. Great forum! I started to have problems with my Whisper Flow pump this season. It is 6 years old and the season started with the pump not turning on without me spinning the shaft. I checked the start capicitor which was normal. I then noticed corrosion at the motor attachment and water leaking out of the bottom of the pump. I took the pump apart, the seal plate attachment bolt lugs where cracked and the impellar had rubbed on the seal plate. I replaced the seal plate, impellar, and all the gaskets. I also replaced the motor with an AO Smith more effecient motor (higher SF and run and start capicitor). Everything went back together great but now the motor is hot and thermal overloads after running 24 hours. I checked the voltage to the motor, impellar size, there is good water pressure and the impellar spins fine. What is the cause of the thermal overload? Is it thermal overload? Is it a bad motor?

    To improve energy cost I also hooked up a Intellamatic timer and question if I need to hook up the Intellichlor as well as the pump to the timer. Now the Intellichlor continues to be on while the pump is off.
    Thanks in advance.
    Randy

    Whisper Flow WF-24 1HP new AO smith motor
    Intellichlor 40
    Triton II sand filter
    30,000 gal vinyl pool

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    mas985's Avatar
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    May 2007
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    Re: pump problem/questions

    Quote Originally Posted by rameaton
    It is 6 years old and the season started with the pump not turning on without me spinning the shaft. I checked the start capicitor which was normal.
    That usually means it is a bad start capacitor. How did you test it?
    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 problem/questions

    I replaced it with a new capacitor and had Grainger check the old one.
    Randy

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    mas985's Avatar
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    May 2007
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    Re: pump problem/questions

    Ok then, on to the second part:

    Everything went back together great but now the motor is hot and thermal overloads after running 24 hours. I checked the voltage to the motor, impellar size, there is good water pressure and the impellar spins fine. What is the cause of the thermal overload? Is it thermal overload? Is it a bad motor?
    Are you sure the new impeller is not rubbing on the seal plate as well? The seal plate could be warped. Also check the diffuser since you didn't mention replacing that. Given the problems you had previously with the wet end, my guess is that there is still an issue.
    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 problem/questions

    After the pump shut of the first time with the new motor. I pulled the motor back out and checked the impeller, diffuser and made sure the impeller spun with little resistance.
    Thanks
    Randy

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