Ok, I admit this subject is out of season to most, but I am stuck in Florida with no snow. [Although I am finishing a polaris 800 rebuild tonight] .We had a cold spell a week ago and I put on the heat, now its warm so I turned on the ac, now the ac will not turn on. The fuse is good, good freon pressure. And worked fine before turning on to heat. So I know its a switch, or sensor of some kind. Any ideas??