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Old 01-27-2007, 08:00 AM   #1
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A/C comes on by itself


I have Tempstar 10 AC unit and a separate electric heater controlled by a common thermostat. The thermostat is set on heat (it is 65 degrees inside). Yesterday the AC unit came on by itself. Wife turned thermostat to off - no effect. Flipped breaker in house and fan stopped but compressor outside continued to run. Flipped breaker outside by the unit which stopped the AC. When I got home from work I flipped the breaker outside back on and the AC immediately started again. Replaced the thermostat but I still have the same problem. What are the next things to check?

Thanks for any suggestions.

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Old 01-27-2007, 08:07 AM   #2
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A/C comes on by itself


outside condensing unit needs a new contactor

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Old 01-27-2007, 03:33 PM   #3
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A/C comes on by itself


Wow. An hour drive to the parts store in Houston, $13.53 for the part, including tax, and I am back in business. Now I am trying to convince my wife I saved enough by fixing it myself to buy a wide screen LCD TV before the Super Bowl. She's not believing a word I say.
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