2004 Chevrolet Tahoe Logo
Grover Ford Posted on Aug 11, 2012
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My ac unit is working but will not blow air out of the dash vents. The blower is working

The blower is working and air is coming out at the floor and defrost vents but not from the dash vents

1 Answer

jared mcelhiney

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  • Expert 47 Answers
  • Posted on Aug 15, 2012
jared mcelhiney
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Joined: Jul 18, 2011
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Hey man if the blower is working and air is coming from your other vents i have a few ideas.First i would start by checking your vent selection switch something may be stuck where the dash vents open. If the selector is fine you should try checking the ducting behind the dash it could have come apart or simply be cloged where it routes air to your dash. hope that is helpfull.

5 Related Answers

Mike

  • 4383 Answers
  • Posted on Jun 30, 2010

SOURCE: my ac only blows from defrost and floor

Look for vacuum leaks. System is designed to fail in defrost mode. so.... vac hose off, for example, would cause an issue like you describe.

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Anonymous

  • 31 Answers
  • Posted on Feb 17, 2010

SOURCE: Heater blows out dash vents only. Will not blow

Sounds like the switch that closes and opens the door for the changing of air flow is bad.

Testimonial: "Thanks, this is the way I will head for repair."

Anonymous

  • 432 Answers
  • Posted on Oct 06, 2009

SOURCE: All Air Conditioning blows our the defrost vents

Some thing you could look at would be this. The control is usually fed by a vacuum line or small hose thats is connected to your intake manifold.
With a cold engine,look for a skinny vacuum hose that runs from the intake toward the fire wall . It should be going inside the cab and connecting to the A/C vent control.Some times the hose becomes disconnected or splits or cracks due to heat under the hood.
Thats usually the trouble.
I hope this helps you.

Ray Keckeisen

  • 599 Answers
  • Posted on Jul 24, 2009

SOURCE: A/C Blows out at feet or through defroster, not through dash

the ac blend door is out of adjustment or the the actuator is not working look behind the glove box and watch the arm move

Anonymous

  • 1 Answer
  • Posted on Jul 22, 2008

SOURCE: There is no air flow

You need part GM Part number 89018675 or ACDelco 15-73596. The Mode Selector Actuator. What happens is the part is a CHEAP part POORLY designed and when it goes to turn the flaps inside the HVAC unit its the plastic gear slips instead of turning the flap!!!

Just to forward you you might want a deal to install this art for you unless your good at fixing your own vehicle, because you need SMALL sockets and a lot of patience to get this part in!!!

The part is ALMOST directly above the steering shaft for your steering wheel, so theres a lot you got to remove before you will even see them!!!

I only recommend you to have a dealer put this part in for you, unless you have your own service manual!!

Because there is 5 of these darn things and if you pick the wrong one you will have to do it all over again!!!

3 on the Drivers side and 2 on the Passengers side!!

But replacing this part SHOULD solve all your problems!! AS it did for me and i was having the same issues as you have described!!


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Hope I was avle to help, glad you up and going.
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