1994 Cadillac blower probelm

Pushing the auto button on, cold air only blows out of the windshield defroster vents. It's cold but not blowing out of the dash vents???

1994 Cadillac deville, any ideas?

We also have the same problem we thought maybe it was a fuse but we checked it yesterday??? Anybody with any clues??

Check vacuum line to HVAC in the engine compartment and under dash.

probably a mode door actuator check vacuum lines and see if you are getting vacuum to each actuator with each command from the a/c control head