I have done a search but not found the answers, so I ask the following. I have a '95 that up until a couple of days ago the A/C was working great. Then one day nothing but hot air. I noticed last night will driving it that when the control knob is in the "off" position I am getting hot air blowing on my legs. The fan is not running but when the car is moving I get the hot air. It seems like a damper is stuck open or in the wrong position possibly but did not know were to start. Can someone help with were to start the diagnostic process for this?