I second johnchalk's opinion on the air vents. My 95 GL has done it twice now.
The thing you're looking for is just above the accelerator pedal and looks (a little bit) like a miniature beer keg. Should have one red and one yellow rubber line coming off of it. The plastic bit on top moves up and down when you change the air position dial, and it if it is not attached to something, it should be. I believe it can just be snapped into place, however.
good luck.
