Question about Heating & Cooling
Check the circuit breakers or fuses first. I'm assuming that the inside unit is running. If the unit has power, remove the small cover where the power goes in so that you can see the contactor. Next set the thermostat to make the unit come on and check the contactor to make sure that is has been pulled in and check for power on the load side of the contactor. If that is good then check the capacitor. If it looks swollen then it is bad otherwise check it with a multimeter or get a heating and air supply store to check it. If the contactor isn't pulled in, remove the face from your thermostat and place a jumper wire between R and Y. If the contactor pulls in then, the problem is your thermostat. If it doesn't the problem may be your contactor. Let me know what you find.
Posted on Oct 05, 2010
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Posted on Jan 02, 2017
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