AC not blowing cold air after breaker trip


Old 10-26-20, 04:05 PM
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AC not blowing cold air after breaker trip

Looking for guidance to diagnose my home HVAC unit.

Breaker tripped while the unit was in operation and after the breaker was reset, there is no cold air. The fan pushes air out but the air is not cold. I have changed the capacitor that was in the outside condenser unit, but still no cold air.

What is the best way to check the compressor? I can take the fan off of the condenser unit to get to the compressor, but I don't know if there is any way to diagnose its status. Would checking the resistance across the terminals give me a clue if it is gone? Anything else I should be looking at/for?
Old 10-26-20, 10:45 PM
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Welcome to the forums.

I'm assuming the condenser fan is running on a call for cooling ?
If the fan is not running check for 240vAC at the contactor.
There are three wires connecting the compressor to the capacitor and contactor.
You can check the compressor resistances without pulling the fan.

Posting the model number helps us to help you better.
If there is a wiring diagram on the service door.... take a picture and post it.

If you do actually work on the compressor itself..... wear safety glasses working around
the wiring connection area. If the compressor is cooked.... that seal can blow.

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