Should auxiliary heat be on all the time? My thermostat always reads auxiliary heat-on. I dont think my heat pump is working correctly. The pipe leading from the heat pump to under the house is always ice cold. I had the compressor replaced in February and I am having the same problems now that I did in February. The company just put another compressor in in December and its still cold in my house with the auxiliary heat on. What could be the problem??? I am tired of $400 electric bills...help!!!