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Fan My outside unit, the fan will not rotate but it will click on and make a humming sound.

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Ifs its a small humming sound,then its the contactor pulling in. But if it a loud humming sound then its the compressor kicking in. and the fans not, try to take something long and turn the blades on the fan, if it takes off and run then your capacitor is shot or swollen at the top,which was cause by power surge. Take-off and replace with the same mfd. writings ,on the outside of can. Also check for blown fuses or tripped breaker . the fuses should be in the disconnect box on the wall, or the breaker in the breaker box.. Older house has fuses instead of a breaker box!

Posted on Sep 01, 2008

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The bearings are bad in the motor and after the fan runs enough it eventually gets hot, making the bearing screech and the fan locks up. Need to replace motor again. See if it has a warranty. The reason it gets hot is because the fan is what removes the heat from the coil and if the fan isn't running there is nothing to cool it off so to speak.

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1 Answer

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First turn off power to the outside unit and use a screwdriver or something that you can reach the fan blades with and make sure the fan rotates freely. If it doesn't you probably need a new fan. Next check the capacitor. If it looks swollen, it's bad. If it's not swollen then you will can use a multimeter with the capacitor test function and check it. You can also take it to a heating and air supply and they will test it. Some units use a double capacitor that runs the fan and the compressor so you will need to take note of where the wires connect to it.

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1 Answer

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sounds like the outside unit fan is not working. it can be two things: the fan motor or capicator. Hope this helps tim

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1 Answer

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You will need to replace the outside fan,or condenser fan motor.
Shut unit down,before the compressor gets damaged.

Without the condensor fan the heat will not be blown to the outside air and the unit will not cool.

You may be low on freon too,have it checked.

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1 Answer

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