If your heat is off don't asume it is the thermostat. Call for service and avoid extra cost. If you put a new thermostat on and it still doesn't work you wasted the money. You can also damage your furnace if you hook it up wrong. If we have to fix what you broke and then the original problem it will cost more. Aaac service heating and cooling can fix your furnace today without extra cost. Furnace repair local in Henry county 7708754113