I've done a search for a while now and still haven't found my situation. No mater what I select with the fan in any speed I still have no air from the vents, floor or defrost area. I don't hear and vacuum leak and checked vacuum line on driver foot well and I have vacuum there. Fan sounds like it is changing speeds still no air. It's like the door is closed on it. Is there a door? Do any of you know a diagram online that I can see how this works or trouble shoot?

Any Ideas?

Thanks