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If80 51 thermostat- displaying incorrect temperature. Says 91 degrees F when it's about 72 therefore air conditioning is not switching off

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Bad thermostat

Posted on May 02, 2017

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Unfortunately there is a calibration adjustment but it's not going to be that much. Sounds like a bad tstat. Either pull face off wall to stop unit or turn off at breaker until hot again temporarily. Remember to turn power off before changing tstat and take pictures or diagram of wiring. Good Luck!!

Posted on Apr 29, 2017

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MANUAL OPERATION
• HOLD TEMPERATURE — With the SYSTEM switch set to
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