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  1. #1
    Join Date
    Apr 2004

    PSC motor just reversed

    Okay, I am sure at somepoint I knew the answer to this once but my mind ain't what it used to be. Here goes. Why does a PSC motor sometimes just reverse. Capacitor is still good but the motor just reverses. What is the technical reason this happens?

  2. #2
    Join Date
    Apr 2003
    Levittown, PA
    I've seen them reverse only on a weak or bad cap or "windmilling" in the case of a condensor fan.

    If the cap is weak it will start in whatever direction "external" forces pull it.
    Last edited by sparks; 06-14-2008 at 09:34 PM.
    Sometimes when I consider what tremendous consequences come from little things, I am tempted to think there are no little things!

  3. #3
    Join Date
    Apr 2004
    That is usually how it goes. Two jobs I have seen the cap was checked (OK) then swapped out because I never trust my MF meter. Still the motor was reversed. Wiring was correct and volts normal.

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