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Need some expertise on an air conditioner compressor fan motor?
Recently my outside unit was having problems. The inside unit would cut off but the fan motor was staying on. I changed the compressor contactor because it was sticking closed. It fixed it and it worked fine for the last week. Now the motor seems to be going out. It kicks on when you turn on the A/C but it sounds a little rough and it starts to go slower and then it cuts off.
Im guessing the motor is shot and its struggling to run for a minute and then an overload or thermo couple shuts it down?
Could it be something else like the control board? Or is it probably the fan motor?
2 Answers
- Comp-ElectLv 77 years ago
Tony's answer is a possibility.
Also if the fan motor has a capacitor, the capacitor could be defective or the start/run switch could be dirty or defective.
But is sounds like bearings. Some motors, the bearings can be changed.
Source(s): 40 plus years certified electrician. - TonyLv 77 years ago
Sounds like the motor.
Check this: Spin the blade by hand. Does it spin freely? Does it coast to a stop? Or does it come to an abrupt stop? If it stops shortly like an abrupt stop then the bearings are dry. Oil may temporarily solve the problem but the motor is basically on it's way to the junk yard.
I doubt the control board is the problem, but without testing it the control board can't be ruled out.
Hope this helps.
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