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Compressor problem? My outdoor unit comes on with the fan blowing just fine. Then I hear a buzzing sound for about 2-3 seconds which I believe is the compressor trying to come on. (Incidentally, a couple of lights inside the house seem to dim at the same time that the buzzing sound occurs.) The buzzing sound reoccurs every couple minutes while the outdoor unit fan and the indoor blower both continue to run. I have shut down both the outdoor and indoor units for a couple hours and tried restarting but to no avail. I took the cover off the back part of the outside unit where the compressor sits and it was disgusting inside. I cleaned it out, but it is by no means spotless. Is my compressor shot?

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  • toothache Jun 10, 2008

    Thanks! the technician replaced the capacitor and now things are up and running again. I really appreciate the advice.

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The buzzing is your compressor trying to start. It is going off on internal overload caused by heating up of the motor windings.If you have an amp meter you could check the amp draw of the comp against the locked rotor amps listed on the tag You could try to have someone test your run capacitor, which looks like a can. Could be round or oval with wires coming off it. Or try a hard start capacitor and relay to bust it loose if compressor rotor is stuck. If that doesn't do it the comp is bad.

Posted on Jun 10, 2008

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