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Thread: no hum on start-up

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    no hum on start-up


    I have an A.O. smith motor on a Sta Rite Max E Glass II pump. The pool wasn't opened last summer.
    So the pump was last operated 18 months ago. It was drained at that time.
    2 years ago the pump was re- built . It was blowing fuses 2 secs after start-up.
    Now when I flip the switch - nothing - no hum.

    I even checked the fuses with a multi meter. They are fine.
    I tapped the housing at start-up too.

    I'll take the motor back to the shop .

    Suggestions ?

    David - Brampton
    near Toronto CANADA

  2. Back To Top    #2

    Re: no hum on start-up

    Turn off power at breaker. verify power is off with meter at the pump deck.

    Remove the motor wires at the terminal.

    Set meter to ohms. check resistance of motor windings. A reading like 10 ohms is good a bad reading will be unreadable and display will flash its error message. ( OL on mine for over-limit.)

    If windings are bad change motor out.
    20k gal. IG fiberglass/plaster rectangle 32'x16'
    Hayward Superpump 3/4 H.P. primary Hayward model 5060 Booster Pump
    Hayward Pro Series High Rate Sand Filter
    Pentair Model 320 automatic Chlorine/bromine in-line feeder

  3. Back To Top    #3

    Re: no hum on start-up

    Now hums- motor wasn't getting power - wife flipped the fuse pack around - not clear mysefl - I'll edit this later.

    one less headache.

  4. Back To Top    #4
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    SouthWest Alabama

    Re: no hum on start-up

    Some fuse holders when flipped one way the fuses make connection with the circuit and flipped the other they are insulated from the circuit. They're no longer code but there a lot of them still around.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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