With winter approaching, I recommend home owners check the emergency heat function of their heat pump. When the temperature drops below 25 degrees F, the emergency heat is needed to keep the home warm. With our mild winter last year in SC, the heat pump would have kept the home warm without the need for the emergency/auxiliary heat. Recommend turning your thermostat to emergency heat only and determine if you get hot air from your registers.
I am a full-time home inspector servicing all of South Carolina.