Air conditioner humming outside but I have shut off the breaker
"Stormin Mormon" wrote in message
...
Probably the contactor. When the furnace indoors is calling for
cooling, it sends a 24 volt signal to the outdoor unit.
To silence this, change your thermostat from "cool" to "off".
It's best if you can read the whole thread before posting. We've already
ruled this out...
-Tim
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