Oh, man...some issues you're having.
My only thought, based on what you've written, is that maybe you've got an issue with one of the vent doors...it happens. If I'm right, there will be a code for one...I know others have gotten them.
dmax on the radio--answering all your car questions as best I can!
watsonnwatson.com every Wednesday at 9 p.m. Call in! (661) 449-9340 Click "Watch and Chat"
Please 'friend' me!