Why won't AC blow thru vents? Compressor and fan motor are working. on 1995 Cadillac DeVille

AC compressor and fan motor is working but air will not blow thru the vents. It was recently working fine and cooling and now will not blow thru vents.

Asked by for the 1995 Cadillac DeVille
1 answer
Does it blow on any other positions? like defrost, floor, etc.?