My heater/ac control quit working, about a month ago. I just happened to install a new battery about a week later, and the heater/AC unit worked again,:) then quit:frown: , there is no display and none of the buttonw work. I have checked fuses they looked fine, but i replaced anyhow and still not working. I bought a new control unit and when i installed it, still nothing worked. Is there a relay of something, I cannot find one anywhere, even looked at a manual. any suggestions, ideas, help, comments,or anything. It is kind of cool now, I hate staying at home because my heater does not work.