vents wont change from demist in VT 5.0

[whitey0]

hey guys,

im wondering why my air vents wont change from demist, i have had the dash apart but didnt see anything wrong, any ideas?

thanks

chris

[DrJeckyl]

You didn't dislodge a vacuum line when you had the dash apart?
If their still attached I would check to see if any are split

[whitey0]

nah i made sure i checked them all and it was doing before i had ever had the dash off, it was working fine when i first got the car then suddenly stopped

[PRAVX II S]

One way check valve.
Check near the firewall.

[whitey0]

where abouts near the fire wall? i cant check atm lol my car is at the mechanic getting dyno tuned

[jessie-lea]

My vt did this other week, line into vents above stereo had come loose. Was getting a slight hiss continually at vent

[whitey0]

alright ill give it another check this weekend