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Thread: Strange Problem with Pentair WFE-28 Duel Speed 2Hp Won't start on High only

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    Strange Problem with Pentair WFE-28 Duel Speed 2Hp Won't start on High only

    Hi everyone,

    I have a 2.5 year old Pentair 2 speed wisperflo 2hp pump. I noticed it stopped working a week ago and I thought it just overheated. I took the motor apart from the housing and visually inspected it there motor spins great with out any noticeable issues. I then turned the motor on for a second on low and it turned on fine, but if I turn it on high it just hums and then stops?

    Any suggestions?
    Under construction DIY 20x40 vinyl liner steel wall pool, Pentair 2hp wisperflo, Pentair tr100 sand filter, Pentair Minimax 400k heater, diving board, 8 foot sit n step, xtream waterslide, 1700 concrete deck, one amazing wife, 4 children and two German shepherds.

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    mas985's Avatar
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    May 2007
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    Re: Strange Problem with Pentair WFE-28 Duel Speed 2Hp Won't start on High only

    Probably a bad capacitor. If you run it on low and then immediately switch it to high (without turning off first), does it continue to run?

    Could also be a dirty centrifugal switch contact.
    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: Strange Problem with Pentair WFE-28 Duel Speed 2Hp Won't start on High only

    Quote Originally Posted by mas985 View Post
    Probably a bad capacitor. If you run it on low and then immediately switch it to high (without turning off first), does it continue to run?

    Could also be a dirty centrifugal switch contact.
    Yes! It does run on high if I start it on low first. What does that mean? Thank you.
    Under construction DIY 20x40 vinyl liner steel wall pool, Pentair 2hp wisperflo, Pentair tr100 sand filter, Pentair Minimax 400k heater, diving board, 8 foot sit n step, xtream waterslide, 1700 concrete deck, one amazing wife, 4 children and two German shepherds.

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    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
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    11,489

    Re: Strange Problem with Pentair WFE-28 Duel Speed 2Hp Won't start on High only

    That means it is probably a bad capacitor.
    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
    Jul 2011
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    Perrysburg, OH
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    88

    Re: Strange Problem with Pentair WFE-28 Duel Speed 2Hp Won't start on High only

    Sounds like it. If you have a Grainger nearby, take the capacitor off and it bring it in. They have a large selection.

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