air vents not changing

[korupt vy]

hey fellas I dnt knw wat has happnd but I cnt change the mode 4 the heater or aircon on my car its always blowing air through the windshield vents n I cnt change it, I have a 2003 commodore with the circle vent selector

 

[jhvh777]

From what I've read in my manual the aircon control box is controlled by a vaccuum hoses, which lead to a vacuum tank behind the glovebox, maybe one of the hoses fell off.

 

[budge]

Possible a vacuum hose has come off, check under the glove box or up behind it and see if a hose has come off a connector, happened to me