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good morning, I am Kevin one of the techs here on JA. Can you give me a little more information on your air handler unit? Model or serial number?
do you have a humidifier installed in this unit?
Three other things you can check.
I would disconnect the G wire at the furnace unit ( this is used for cooling, so if you are done for the cooling season, you could disconnect this temporarily) This will narrow down to the furnace or wiring/tstat problem. If the problem continues after disconnecting that wire, then your problem is most likely the control board at the furnace. If it does not continue, then reconnect that wire, go to the thermostat and disconnect the g wire at the thermostat. Again, if problem continues, you have narrowed it down to the wiring, if it does not continue, it is the thermostat.
If there is anything I can help you diagnose further on this issue, please feel free to contact me....
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