Question about Heating & Cooling
If the humming noise is coming from the attic it would indicate that the blower motor on the air handler is trying to start but the rotor is locked.
If the humming noise is coming from the outside unit and the fan runs but the compressor does not your compressor has a locked rotor.
If the blower motor is the problem the outside unit should still start as normal but you would have no cooling due to no air movement.
In ether case it sounds like you need to call a service tech to diagnose your system.
Posted on May 03, 2008
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Posted on Jan 02, 2017
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