Help I'm Roasting

[jallo]

I have a defrost problem. Hot air comes in thru the defroster all the time even though the heat system is turned off. It was OK this winter,, but now I am roasting Need to fix before summer gets here. Any Help would be greatly appreciated

 

[ground_zero298]

Might be a cracked or unhooked vacuum line on the back of the control unit.

 

[chris2523]

Might be a cracked or unhooked vacuum line on the back of the control unit.

+1
thats my guess. happened to my car.