Call back. Customer states thermostat is going above or below set temperatures. Upon arrival I checked over thermostat operations, system was satisfying at correct temps in heat and cool. Checked charge on condensor and checked heat rise and delta T both look good. The indoor blower motor would not turn off with thermostat, checked control board it’s working properly. Removed thermostat from wall indoor blower turns off. Diagnosed as faulty thermostat. Replaced and system is running correctly now, indoor blower coming on and going off with satisfied temps on thermostat. System is running correctly and efficiently.