I have a 92 S4. I will be driving with all the windows up and the climate control turned off. Every few minutes, it decides that it is going to blow air on me, usually hot air. Happens more if I have the windows down. Does this happen to everyone else? Is this an indication of a bad CC head? Are there problems with my heater core? Should it be getting hot water in it if I have the Climate Control shut off? My brothers 86 5KTQ just suffered a heater core failure which lead to a cracked head. He stated that his started doing the same thing mine is doing for about a year before his failed. Any suggestions out there, or similar experiences?