My '01 Tahoe's AC has an intermittent problem with the AC. Around once a week, it will only blow hot air regardless of what the temperature **** is set on. Sometimes I can get it to work again by turning the temp **** and fan speed **** back and forth. Other times, I have to cut the engine off and on again. That has worked everytime so far.

Does it sound like a switch, a short somewhere, the potentiometer? Any help would be appreciated. Thanks