Heat Pump Fan Not Spinning

Discussion in 'HVAC Heating & Cooling' started by Mike Edmonds, Feb 3, 2014.

  1. Mike Edmonds

    Mike Edmonds New Member

    Joined:
    Feb 3, 2014
    Location:
    VA
    Hi Forum!

    My heat pump fan does not spin. If I turn it off and try to spin it, it turns freely, but with it powered up, it turns tight. The cap seems to be OK; no bulges.
    Is my motor shot?

    Thanks!
    Mike
    ;)
     
  2. DonL

    DonL Jack of all trades Master of one

    Joined:
    Mar 30, 2011
    Occupation:
    Rocket Scientist
    Location:
    Houston, TX
    Sounds like the variable speed controller may have a problem.

    Did you reset the controller ?


    Good Luck.
     
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  4. nukeman

    nukeman Nuclear Engineer

    Joined:
    Nov 20, 2009
    Occupation:
    Nuclear Engineer
    Location:
    VA
    I had an old AC unit where the fan wouldn't kick on. If you gave it a push with a stick, it would come up to speed and spin for a couple minutes and then would stop again. In my case, the cap was bad even though it looked fine. It was only a $20 part, so it was worth a try and that was the fix.

    If it is a newer system, it may have a variable speed control (like Don mentions). If you could give us more info (model number, etc.), we might be able to tell you what it could be.
     
  5. Mike Edmonds

    Mike Edmonds New Member

    Joined:
    Feb 3, 2014
    Location:
    VA
    Thanks guys!

    It is an A O Smith motor: F48T12A01, 1/3HP, 2.0Amps, 1075RPM
    Cap: Packard POC 7.5uF
    370V, oval: 2"x1.25"

    I don't think it has a controller. It's 20 years old.

    I remember now, that it did run once when I switched the outer unit back on when I was first looking at it.
    A local shop said it was the motor, but I am beginning to think it may be the cap?

    Thanks a lot!
     
    Last edited: Feb 3, 2014
  6. DonL

    DonL Jack of all trades Master of one

    Joined:
    Mar 30, 2011
    Occupation:
    Rocket Scientist
    Location:
    Houston, TX
    That is a run cap and is likely to be bad.

    If you can heat it up with a Hair Drier, you may be able to get it running, just for short test.

    You should be able to get one for around $15.00

    They can look good and still be bad, At 20 years it would not hurt to replace it.


    Good Luck.
     
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