My top vents on my 2002 Chevy Trailblazer will not blow any air
Asked by Anthony Aug 08, 2020 at 06:43 PM about the 2002 Chevrolet Trailblazer LTZ 4WD
Question type: Maintenance & Repair
Does anybody have any idea why the top vents on
my 2002 Chevy Trailblazer will not blow AC or
heater I was told to go to the dealership to get it
fixed but that's kind of pricey now the vents by my
feet will blow in the rear passengers ac will blow
but not the top vents i dont know why the defroster
works too please let me know thanks
4 Answers
You have a vacuum leak either in the engine compartment or under your dash
When the system loses vacuum it defaults to defrost for safety reasons. Look for a broken or disconnected vacuum hose in the engine compartment. You have a vacuum reserve tank either in the driver's side front fender or attached to the underside of the hood. It will look like a black plastic ball or a black square box. It will have two vacuum hose connections on it. Trace the vacuum hoses from there and look for a break in one of the hoses. Hope that helps! Jim
All I had to do was take the fan out and turned out it was full of leaves and I popped it and it was great and still is. The relay beside the blower is connected to the fan motor so it has to disconnect from fan motor
And I ended up having to change resistor also that went out later and also if you can get air for back seat in the middle of the seats I would definitely try fan motor and resistor and please don't take accuators off they are so hard to get to and so I am just saying what I had to do with mine
