Last Dec when I was in SC I noticed my heat pump did not work very well the nights the temp went to ~30. I could not keep the house warmer than 65. I've tried to read up on this but I wonder what others have experienced. I heard heat pumps don't work well below freezing. During the day it functioned normally and I could heat to 78 (that was warm enough so I didn't go higher) Should I still leave it on at night even if I can't get the house temp above 65 or just turn it off? What is better for the heat pump?
