No air coming out of dashboard vents

[waezsn]

Any idea? The blower works… I can feel air coming out of the bottom foot part and air coming out of the window defroster. But when I switch to the passenger and driver vents nothing comes out. Sounds like something is blocking the air. Or maybe theres a dirty filter? Any idea? BTW I have a E30 M3 if that makes and difference. Thanks

[redsubdivisions]

Our cars didn't come with cabin filters. My first guess would be a door not actuating or stick open. Only way to check is to look