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  1. #1
    Join Date
    Jun 2007
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    Phoenix
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    29

    Lifespan of Condenser Fan Motor

    How long should a condenser fan motor last. Several that I replaced are failing after only about 3 years. I am careful not to distort and unbalance the fan when I replace them. The motors that are going bad are GE's, made in India. Any ideas?

  2. #2
    Join Date
    Aug 2004
    Location
    Kentucky, Michigan, Ohio, Arizona, Colorado, Nevada, and Califormia
    Posts
    318
    maybe it's GE. More likely though, the fan blade has become slightly imbalanced through no fault of yours. A lot of them have clip on weights from the factory balancing..much like a car tire... and they can come off. Also have had hail/sticks etc hit the blade while running and cause the same thing. Further, is the system maintained properly ? If I have to replace more than one OFM in a systems lifetime, the second replacement always comes w/ a new blade.
    "Surprised ?! If I woke up tomorrow with my head sewn to the carpet, I wouldn't be more surprised."
    Clark Griswold

  3. #3
    Join Date
    Jun 2007
    Location
    Phoenix
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    29
    Thanks for your reply. Yes, these systems are well maintained. Is there any way to spin up a fan and tell whether it is out of balance or not?

  4. #4
    Join Date
    Aug 2004
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    Kentucky, Michigan, Ohio, Arizona, Colorado, Nevada, and Califormia
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    I guess if it's severely out of balance you'd see it. The weights are very small and your motors are lasting longer than they would if the blade were badly damaged or out of balance. Not to mention the outdoor unit shaking. For the cost of the blade, i'd just change it. I assume you check rotation, capacitor size and MFD's, running amps, etc.?
    "Surprised ?! If I woke up tomorrow with my head sewn to the carpet, I wouldn't be more surprised."
    Clark Griswold

  5. #5
    Join Date
    Mar 2007
    Location
    Phoenix, AZ
    Posts
    574
    I don't know from Adam, but I would think you might be able to hear and/or feel an out-of-balance fan. You can most certainly feel an even SLIGHTLY out of balance tire on a car (butcha gotta have a smooooth road).

  6. #6
    Join Date
    Jun 2007
    Location
    Phoenix
    Posts
    29
    Quote Originally Posted by lra View Post
    I guess if it's severely out of balance you'd see it. The weights are very small and your motors are lasting longer than they would if the blade were badly damaged or out of balance. Not to mention the outdoor unit shaking. For the cost of the blade, i'd just change it. I assume you check rotation, capacitor size and MFD's, running amps, etc.?
    Changing the blade is probably good advice however it's always the problem of not usually having the right blade HP / Diameter on hand. The motor rotates freely, I replace the caps when I replace the motors. Cap size is correct (10 uF 370V), current draw is a little high about 3.0 amps for a 1/2 HP motor. And the motor is wailing like a pack of Coyotes on a full moon night.

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