I have a Hiel Forced Air furnace with Heat Pump/AC and Electrical Auxhillary Heat - 11 yrs old.
Situation: Aux Heat not kicking in in auto mode to assist Heat Pump (LED on thermostat not lighting as I believe it should). Heat Pump barely brings the house up to 64 deg F and runs continuously 24/7 - my electrical bill is setting all time records.
Blower and thermostat LED function when Aux Heat is manually called for. The Heat Pump shuts off and the air from the floor vents is very cool as are the sides of furnace near the heating element. Aux. Heat will not bring the house up above 60 deg F.
I found a small pigtail wire on top of the furnace unit (washer type connection on one end, female spade type on the other) so I opened the wiring panel to inspect. There were four ceramic insulators with two leads each with wires connected to what I think are relays - each of the relays had two wires, except one. I connected the wire (nothing blew up and the house didn't burn down) but it had no effect on the performance of the system.
Could it be that I have a faulty relay or two? Could it be something worse? Any suggestions are greatly appreciated.