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Ac not working

Lost power today, when power came back, the outide compressor didnt work. (Gibson) Electric company came out to check electric, we have full 240 volts. he checked the fuses in the disconnect and they are good. I reset the thermostat and the compressor started to make a buzzing sound, but the fan on the condensor unit did not come on. I have shut off power to the unit. Help

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The buzzing sound, along with the fan motor not running, usually indicates low voltage to the contactor and the contactor is not engaging or closing the points and it usually buzzes when this happens.
You first need to check and see if you are getting 24 volts to the contactor coil. You should at least have 21 volts, if not check for loose or dirty connections, if none, check the voltage at the transformer to see if you're getting 24 volts there.

Posted on Jun 04, 2010

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Posted on Jan 02, 2017

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