Climate control probs
 

My heater is on even if the knob is in the off " o " position. its blowing out of the center vents and the top vents.... what could this be?

Thanks

The Vacuum hose probably has come off of the vac resivoir. Its kinda inside the bumper on the pass side. Its a black cylinder with rounded ends and a single hose hooked to it. If its not hooked up your HVAC wont work.

the canister is plugged in. maybe there is a leak somewhere else?