I have seen numerous threads/posts about people that are only getting air through their defrost. It sounds like that has to do with a vacuum leak. I am having the opposite problem where I get my vents and floor air fine, but nothing is coming out of my defrost. Apparently in the state of Virginia, that means your car does not pass inspection. The garage said it was 'a busted flap' which agrees a bit with it not being a vaccuum leak or similar issue. Because of needing to remove the dash, and apparently the possibility that my AC would need to get recharged (?) they wanted 1000-1400 to replace this flap. If anyone has insight into an issue like this and if it could be repaired with any shortcuts that prevent me from taking about the entire dash, it would be greatly appreciated.