Question about 1999 GMC Yukon

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Air doesnt blow out of vents just defrost and feet

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Check your vacuum lines under the hood. Mainly any that you see that go into the truck. Sounds like one is off or broken.

Posted on Aug 25, 2010

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Vents won't blow hot or cold air. Comes from defrost and feet when you put fan on.


It's the vent actuator, it moves the baffle that changes the direction of the air flow.
Here is a video of a broken vacuum hose that creates the same problem.

It could also be a failed actuator.

Sep 19, 2016 | 1997 GMC Safari

1 Answer

Why is there no air blowing out my dash vents?


the air vent is control in your consul maybe is not properly set up check to the a/c technician

Jun 17, 2013 | 2001 Hyundai Elantra

1 Answer

Air blows only on windshield even when placed on vents or feet


you may have abad slector door acuator.which is alittle motor bolted on the heater box.It move a door in box to direct air flow to right location.hope this helps.

Sep 27, 2009 | 2000 Dodge Durango

1 Answer

Replaced battery in 2004 chevy trailblazer 4x4 8cl., then air conditioner doesnt blow out the face vents only the defrost and feet. any ideas?


Typically, you have a vacuum issue, air flow system is designed to FAIL in the defrost mode, so no vacuum, doors are spring loaded to blow out defrost ports.

Sep 25, 2009 | 2004 Chevrolet TrailBlazer

1 Answer

Jeep AC blows cold air at defrost and feet but not through vents


There is a flap that directs the air. the flap is controlled by a vacuum actuator. This is located inside the venting. The actuator is connected to little vacuum hoses that attach to the temperature control switch. Either the flap is stuck, or the actuator has gone bad.

Jul 01, 2009 | 1999 Jeep Grand Cherokee

1 Answer

LINCOLN LS AC DOOR PROBLEM


you have an operating trampilla ,sorry i only know the word in spanish,the valve thats worked by engine vacumn it opens the vent flap ,the block connection for the vacumn pipe has a series of electrical operating relays that open the valve that lets the vacumn through to the appropiate vents where it opens the trampilla .The fault could lie in either the clima computer or a relay valve or the rubber diaphragm in the trampilla,best of british with it

May 20, 2009 | 2004 Lincoln LS

1 Answer

No air flow to dash vents and feet vents


99% of the time when they do that it is the control head. that is the thing you adjust all your temp settings on. have to purchase from dealer. have last eight digits of vin # when ordering.

Dec 09, 2008 | 2001 Chevrolet Tahoe

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