AC Turns On When Thermostat is Off

Old 12-24-11, 07:26 AM
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AC Turns On When Thermostat is Off

My AC thermostat was set on 'Cool' at 90 and turned itself on when the temp in the house was 70. So I turned the thermostat 'Off'. After a while it ckicked on again. Thinking it was a problem with the thermostat I completely disconnected it. After a while it clicked on again even though there was no thermostat (only bare wires). Any suggestions?
Old 12-24-11, 07:43 AM
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do you have a furnace or an air handler? You need to look for shorts in the low volt wiring to power. 24V is required to pull in the contactor in the a/c

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