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Old 09-27-2011, 07:09 PM   #1
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Fan motor won't turn on; ohms out fine...


So my compressor is kicking on..fan motor does not, so of course the compressor eventually hisses from the internal relief. Ohming out the fan though, I get 30 ohms on C to S, 25 on C to R, & the sum of 55 on R to S..so pretty sure that means the motor's good. What else could be keeping the fan from not turning on? I don't think it could be overpressured, it's been working fine all summer...unless there's a blockage in the lines, which would suck. I left the unit disconnected all night to be sure the fan motor would cool down, & it still won't come on.


Last edited by reatarted69; 09-27-2011 at 07:15 PM.
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Old 09-27-2011, 07:20 PM   #2
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Fan motor won't turn on; ohms out fine...


Could be the capacitor, or if this is a heat pump, a faulty control board.

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Old 09-27-2011, 07:29 PM   #3
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Fan motor won't turn on; ohms out fine...


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Originally Posted by Master of Cold View Post
Could be the capacitor, or if this is a heat pump, a faulty control board.
I originally thought it was the capacitor as the fan AND compressor wouldn't turn on; it tested bad. So I replaced it, & now the compressor comes on but fan does not..quintuple checked the wiring, too. It is not a heat pump.
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Old 09-27-2011, 07:34 PM   #4
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Fan motor won't turn on; ohms out fine...


Bottom line is if the capacitor is good and there's 240V to the motor and it doesn't run then you buy a new motor.
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Old 09-27-2011, 08:51 PM   #5
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Fan motor won't turn on; ohms out fine...


Mind telling us where the wires from the fan are?
I do the same test on the motors, and have never had a motor test good and not run (unless the bearings are seized).
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Old 09-27-2011, 09:24 PM   #6
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Fan motor won't turn on; ohms out fine...


Alright, I feel dumb..had the C wire from the compressor on the wrong side of the contactor. It's working now..thanks guys.
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Old 09-27-2011, 10:33 PM   #7
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Fan motor won't turn on; ohms out fine...


Its ok..I actually looked at your screen name and figured it out..

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