Bexley, OH - working and the heat would come on the turn off. Customer also said that she tried to take the thermostat off the wall. Tech found that the thermostat connection was lose and flashing low battery. Tech replacement batteries that customer provided. Tech replaced thermostat on wall and made sure the connection was tight. Tech cycled fan on thermostat. Fan came on.. I  cycled heat. Heat came on and has been running for ten mins with no issues.
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