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View Full Version : Buzzing in thermostat - A/C unit not working


sgs10
Jun 8, 2012, 05:41 AM
My thermostat is making a humming/buzzing sound when it tries to turn on my A/C unit. The thermostat clicks for the temperature, then hums/buzzes, but unit does not respond. Therefore, no cooling! Is this something simple that I can fix, or should I call in the professionals?