Foxbody vent selector
 

My fan only blows through the defrost area. The selector feels like it is working. I pulled it off and it is not broken.

Anyone run into this before?

check the vaccum source line that runs through the firewall by the evaporator lines....see if that vaccum line is broken or trace it back to the vaccum tree and see if it is hooked up.....on the tree there is a spot labled a/c iirc.