Great thread guys, thanks!!! I have a 2008 Megacab 4x4 Hemi that I bought new and it has been to the dealer twice for this problem. Now it is happening a 3rd time. I have the lifetime warranty so it costs $100 every time it goes in. I think I am going to follow your advice and remove or screw the door up. I just need to figure out what mode it will be in if I remove it or what mode will it be in if I screw the door up..... I am sure that one mode is recirc and the other mode allows outside air. Anybody know which mode is which? Thanks