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Thread: Need help diagnosing a pump issue

  1. Back To Top    #1

    Join Date
    May 2014
    United States

    Need help diagnosing a pump issue

    I'm a relatively new pool owner (2 summers using the TFP method--big fan!) and I need some help diagnosing an issue I'm having with my pool pump. I just turned it on backwash for the first time this spring and everything seems to run fine until right before the pump basket is just about primed. Once it reaches that point, the pump motor slowly starts to rev down, I hear a clicking noise from the motor, it briefly revs back up and then back down, I hear the clicking noise again, and it then continually repeats this cycle (there's about a 3 second interval between each clicking noise).

    I've already detached the pump motor and taken it to Leslie's to see if the capacitor was bad or something like that, but when the service guy hooked it up and ran it, it ran perfectly fine. I then did the same test at my house (ran it detached from the housing), and it ran fine then, as well. Does anyone have any ideas as to what could be causing this issue? Thanks in advance.
    12 x 24, ~12000 gallon, vinyl liner w/ super-old Hayward pump/filter

  2. Back To Top    #2
    mas985's Avatar
    Join Date
    May 2007
    Pleasanton, CA

    Re: Need help diagnosing a pump issue

    It could be the centrifugal switch. That is about the only thing that would click on the back of a motor. Perhaps one of the springs popped off the governor.
    Hydraulics 101; Pump Ed 101; Pump and Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, 1/2 HP 2sp pump, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater, ThePoolCleaner

  3. Back To Top    #3

    Join Date
    Apr 2016
    Quaker Hill, CT

    Re: Need help diagnosing a pump issue

    Again I agree with Mas the click you are hearing is the spring loaded capicitor cut out flywheel. Once the motor is up to full speed the flywheel takes the capacitor out of the circuit. The capacitor is there to lower the load speed amp draw of the motor. It sounds like the motor is slowing down under load the capacitor is kicking back in which speeds the motor back up. Testing a motor unloaded doesn't give you an accurate picture of motor health.
    15x30 AG Ovation Fantasy pool all Aluminum frame, 13,000 gal Vinyl Liner
    Pentair Super flo VS, Crystal Flo II 19" sand filter
    Aqua Comfort ACT750 heat pump
    TF-100 test kit

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