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Need some help please, I have moved into a house that is about 10-year-old. The A/C seemed to work fine but I have tried the heat and it’s not working right. Here what it’s doing. When I turn the thermostat to 72 the heat pump will turn on outside. I go upstairs and removed to furnace cover and can feel the heat off the coils. But after maybe 10 minutes the outside unit turns off and the aux turns on. Now when the thermostats get to the set temp the heat turns off but the blower fan won't. I can get the fan to stop blowing by turning the temp down by 1 degree. I have two units and both act the same. Anyone have an idea what to check also both Thermostat have the check light flashing.
E1RE036S06G
E1RE042S06G
F2RP036H06G
F2RP042H06G
Robertshaw thermostat 9620
Robertshaw thermostat 9620
E1RE036S06G
E1RE042S06G
F2RP036H06G
F2RP042H06G
Robertshaw thermostat 9620
Robertshaw thermostat 9620