Question about Heating & Cooling
When i turn on the a/c my fan condenser doesn't run
When you turn on your A/C does the compressor come on? Unless you have a heat pump or you have a newer A/C that has a control board in it you won't have a fan relay. The fan is powered by the contactor, when it is energized the fan and compressor will both come on. If the compressor comes on and the fan motor doesn't. Disconnect all the power. Try spinning the fan blade,if it spins freely the bearings are ok, if it doesn't stiff or drags even a little, then the bearings are bad and the motor needs replaced. Then check the capacitor, if it has a bulge or is swollen then the capacitor is bad and needs replaced. You sometimes can take it to your parts store and some of them will check it for you. Last with the power back on and the unit calling for cooling check the volts to the motor terminals if you have 230 volts and the capacitor is good, then the motor is bad and needs replaced, if you don't then you need to check the fuses at the disconnect or breaker.
Posted on Jun 01, 2010
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Posted on Jan 02, 2017
Tips for a great answer:
If it is just the condenser fan that means you have a fan relay that has welded shut. Turn power off to your unit and trace the wires from your condenser fan back into the control panel at the unit. You'll have 3 wires going to it. 2 go to the run capacitor and one goes to the fan relay. The one that goes to the fan relay is the part that needs to be replaced. If you have no fan relay and it goes to the main contractor, half of your main contractor is welded shut and will need to be replaced.
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