I just purchased a 91 LX Coupe 4cyl and the vents will not move from defroster and floor to any other selection. did a search and couldnt find anything about it. what would cause this and what do i need to replace first? is it the vacum lines at the switch, a hole in one of the lines, or where the lins eventually go to? thanks for the help.

 

ttt anyone??? i really need to get this resolved