The heatpump blows out air ok but no heat? - Heating & Cooling

You are probably going to have to call a Hi Vac repair as your freon is probably too low to operate your Heat Pump properly. The only difference between the Air condition side and the heat side is a reversing valve that takes the heat produced by the Air Conditioning (cold) side and sends it into your house and exhaust the cold air out side. If the pump cannot produce heat from the expansion and compression of the freon, then no heat. You may also want to check that the pump is running as it is protected by two large BUSS fuses on the AC power to the heat pump and if any one or both of those fuses are blown, then no power to the Heat Pump. There should be an 8 inch square box mounted on a wall next to the heat pump that supplies 220V to the pump.