Ultimate Heating Tune-Up Duel Fuel: serviced and inspected gas heating system checking air flow, temperature rise, electrical, gas pressure, safeties, controls and limits, heat exchanger and venting. cleaned and checked system components to manufacturer specifications and performed combustion inspection. serviced and inspected heat pump system, electrical, safeties, controls, reversing valve and defrost cycle to manufacturer specifications. Reconfigure drain off of coil to provide positive air through drain pipe to number one help the water drain out due to the lack of pitch on the drain pipe through the attic and secondly to help with the outside not freezing. Tested pipe outside to verify that air was blowing out and water was coming out. This is the only thing we could do to try to help prevent the outside from freezing in the winter time. However, it is still possible it could freeze. But this is the only thing we could do to help with the situation. Removed old dryer ven