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Fan motor comes on, however, when a/c is turned on, breaker pops

\015 The fan motor appears to work ok when only the fan is turned on, however, when the a/c is turned on and the thermostat is set below room temp....the outside condensor starts momentarily and then everything stops and the inside fan breaker pops. every thing stops running...?\015

Answers :

If the unit is working fine in heat mode and in fan only mode, you have a short in the wiring going to the ouside unit. If it were a fan relay, then everytime the fan came on the breaker would trip. But either way, there is a low voltage short taking place in the unit. If the compressor was bad, the indoor unit would run fine and would only blow the breakers to the ouside unit. I had a unit last summer that did the same exact thing. After I replaced the control wiring to the outside unit, everything worked like a charm. Good luck!

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