I bought car used about 1 month ago and problem was present then. When A/C is turned on it will only blow out hot air. Major A/C was done by
last owner and compressor runs and lines get cold. I unplugged the Blend Door Motor and plugged up new Blend Door Motor. With key on and
electronic temp. control set at any temp, the motors shaft does not move at all. I checked fuse #32 because it is related to Blend Door Acuator;
it was perfectly good and not blown. Am I looking at a bad control head in my dash ? These include the automatic A/C controls and AM/FM-Cass
radio in one piece. How often do these units fail as a whole ?