My AC isn't blowing cold air through the two middle dash vents. The side vents are blowing cold, but the air is blowing up on the defrost/window instead of out of the two middle vents.

My indy said his computer program doesn't give him any information on HVAC to track the problem. Is there anyplace online where I can find this so I can print it out and give it to him?


1989 300E
229,500 Miles and going!