Help! We just purchased a 97 Grand Prix with automatic thermostat heater (all push button, set climate control). I have tried everything (yes, I read the manual) but I cannot seem to control the heat. It jumps randomly from hot to cold, even when set on 90 degrees, recirculating or auto..nothing seems to help. Also, vent to left of driver does not seem to be blowing. Can someone tell me what could be causing this? Don't know if AC is same, too cold right now. Blessings..Melanie
