2003 chevy trailblazer_lt
Just brought 03 trailblazer, everything seem good until 5 days ago the weather here (SC) went from 20 to 80 in the same week. So I turned on the a/c on to find out its blowing hot air. Freon level is good, the a/c light comes on, and the blower direction works. However the climate control, it doesn't matter if its set on coldest or hottest just hot air come out. This happens on both side of car. Any information will be helpful.