I had the outside fan motor recently replaced on my electric heat pump. Since then, I've noticed the the inside fan runs almost continuously (in heat pump mode) and never raises the inside temp more than a few degrees, irregardless of the outside temp. In addition the outside coils ice up to the point that I must shut off the heat pump mode and switch to EM mode.
Wayne said something about a heater switch. Is this something I can check? Do you know how the switch is supposed to work? Is there something I can check out or look for? Unfortunately, I don't have schematics for the pump.