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I'm going to open this backup to my colleagues so one of them can help. Please don't respond (even to acknowledge this post)until you get a response from us. If you respond first it will only delay your answer.
Please provide following information
1.Model on indoor unit and if you have a heat pump. model on outdoor unit.(On label on unit)
2.Model on thermostat (Inside cover)
Thanks for this info. Now Ami are we controlling a gas furnace , electric furnace or a heat pump with the 8022C?
Ami can you do some hands on troubleshooting?I so remove the R and W wire at thermostat and touch them together and lets see if heat will come on.That will tell us if issue is in thermostat or heater.If it does not we will move to the heater.