1997 GMC Safari "defrost" Questions

2002 gmc safari van defrost blow cold, a/c blow out of defrost air condition blow cold out of defrost duct. blend air door will not change for air condition open the hood and check for leak on any ...

air only blowin out defrost It could be a vacuum line that activates the defrost/heater cross over.Not sure but can check fuses. Maybe AC or blower motor fuse

air out defrost only air only comes out the defrost vents no matter what setting is on . Fan works fine. I changed the controller panel for settings The vacuum line is not connected or broken. You ...

will not come off defrost even with the air cond. check under the hood with the engine running you will most likley hear a hissing sound from a broken vacuum hose these are known for this when you ...

Ventilation only moves thru window defrost ports no matter what setting of the control knob pull knob off is it broken on back side? it may feellike its working but not if cracked The vacuum line may ...

defrost, heater, vent switch isn't switching the control to a differnt source defrost, heater, vent switch isn't switching the control to a differnt source There is a small vacuum hose ...

my vent will not change from defrost on my 2000 Safari YOU HAVE A VACUUM LEAK AT A/C PLENUM. IT'S VACUUM CONTROLLED AND DEFAULT IS DEFROST, IF VACUUM LOSS IS EXPERIENCED THIS WILL HAPPEN. TRY TRACKING

vents won't blow hot or cold air. Comes from defrost and feet when you put fan on. I can't get the fan to blow heat or ac from vents. Blows through defrost and feet instead. Can feel air from vents, ...

and the AWD light does not come on the dash when I turn the key on. Also the air only comes out the defroster vents no matter what I put the setting switch on. i do not know if the to are conected but

2003 gmc safari air will only come out of the defrost vents. fan works fine. No matter what air flow selection I choose, the air only comes out of the defrost vents. The climate control unit might ...