what do i need to check to find out why i have most of the heat blowing from the defrost when the setting is on heat. thanks
It's most likely a vacuum leak that is preventing the door from moving into the correct position. Fisrt thing I would check is the vacuum tank on the firewall if it's an A/C car. Otherwise you probably have a broken cable on the the selector. Larry
Is it possible that the door could be broken also? That happened on my truck, and i would have the air on full blast but hardly any would come out. I noticed the door had fallen off, and i had to replace it. Just my .02cents
