$56.99 Auxiliary Heat Nest Wiring Diagram Heat / Google Nest Thermostats : Many thermostats have rc and 
Auxiliary Heat Nest Wiring Diagram Heat - Nest Thermostat Heat Pump Aux Heat Wiring Diagram 
Nest is blowing cool air while on heat. Gen 3 hewt punp heat pump about 12 yrs okd. It did this 
