I live in AZ, so it gets hot. If it gets too hot inside the car, my AC stops working. The entire panel is dead and unresponsive, with the exception of the rear defrost button, which appears to work normally. The fan blows outside air on high. As it cools down inside some, the air velocity lowers. Typically if I am parked in shade and leave windows cracked, and the temperature stays under 110, it will keep working normally. If I park in direct sun and the temp gets into the high 90s, it dies. If it gets much over 110, it dies, either in the shade, windows cracked, whatever. Usually overnight, it cools off enough that the AC starts working again, and once it was a cool evening and driving with the windows down, it cooled down enough that it started working.