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A/c outside unit is not working- fan will not work.

WeatherKing Select 10- model WAKA- 030JAZ. MFG. in 1996.

Indoor fan on our furnace is operating. Outdoor unit made a ''buzzing'' noise, but the fan will not engage. We do not have this on a circuit for this unit in the breaker box- there's a black unit outside on the side of the house by the actual a/c unit. Can't find an on/off switch to the outside unit- is there one?

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I assuming that the black box is a 100 amp breaker, which is connected to your condsensing unit (outside unit). If you open the box and pull the fuse then this will turn off/kill the power to your unit. As far as the buzzing noise it could be that the contactor is engaged. Hopefully, your fan motor is burnt out or the capicator is bad. If you take the access cover off and check for voltage at the contactor you should know if it is the fan motor. The voltage will come in at the bottom T1 T2 T3, once the contactor is engaged L1 L2 L3 will have the same power. Of course if your contactor is not engaging then thats the probelm, you can manual engage the contactor by pushing it in. There will be four wires two running to the capicator and the other to the contactor, these are the wires that control the fan motor. The other three wires run to your compressor. Hope this Helps Tim

Posted on Aug 03, 2010

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