I recently used my heater for the first time this Fall... The A/C was blowing cold and working perfectly, but yesterday morning I turned the heat on to warm the car up as it was a chilly morning, The heat fine as well.. As the day continued the day got hot, I adjusted my thermostat back to A/C but somehow hot air continued to blow..Does anyone have an ides of what could be the issue.. I am positive that the car is good on freon and the AC was working great the day before. What could be the issue with the air not going back to cold? Any help would be greatly appreciated as the closet Bentley Dealer is 6 hours in east or west.