HVAC question

[turbov6joe]

What might cause the air from my AC to only come out the windshield and floor vents? I could not find any vacuum lines disconnected. Any other suggestions?

 

[RmvBfrFlght]

One of the doors is sticking, can't recall which one it is. Had an '85 and an '87 that both did this. Eventually the door would come loose and slam with a bang.

RemoveBeforeFlight

 

[turbov6joe]

Thanks to all those that offered opinions, but I got it fixed... Turns out I had a cracked vacuum line in the engine bay.