Question about GMC Jimmy

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Hot air only for defrosters and vent. Not down by your feet.

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  • Samuel Charles Spriggs May 11, 2010

    Do hear air hissing when you operte the selector lever on the heater controls?

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Most vents are controled by vacuum canister and, a lever so; first look under the dash for the heater box and you should see a small silver can with a hose going to it this can has a rubber disk in it's middle that moves a lever slecting dash or. floor air discharge most of the time the hose has fallen off or, the lever has come off.

Posted on Apr 21, 2009

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2 Answers

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 my 97 honda prelude always blowing hot air at my feet even when the air is off


HONDA EXPERTS accord vents dont switch anymore? ' Yahoo Answers

https://answers.yahoo.com/question/index?qid...Sep 13, 2008 - my 1994 honda accord ex has a problem. the heater vents dont switch ... defroster and feet etc.. none of those work anymore. nether does my AC, ... still no change. they will blow hot and cold air out of the front "in your face" ...

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Honda 98 prelude 5th gen A/C delete H22A New belt size = 37 inches (same as 97 accord) ... New belt size = 37 inches (same as 97 accord) ... How to: 1990 Honda Prelude - Diagnosis Air Conditioning Inop and a Vacuum leak ... Fixing A Car Air Conditioner That Blows Hot Air - Duration: 3:42. by Scotty ...

Sep 25, 2015 | Honda Cars & Trucks

1 Answer

99 wrangler air (no AC) only comes out of defrost vents, no matter what selection the knob is on (ie.vent, feet, feet/vent, etc)..what causes this?


Defrost is default mode. You have an electrical/vacuum/blend door motor problem causing this issue.You need the system checked by a pro to determine the failure

Jul 15, 2015 | Cars & Trucks

1 Answer

2005 Nissan Sentra - only blowing hot air from vents. Even when it is set on cold. It is only coming out of the feet vents as well and maybe a little from the defrost. The different air strengths...


is this a new problem or just a new car?
tell what you expect?
no car has perfect venting and never will.

is the problem, temperature lever set to cold
but i get hot air?
yes, then the temperature control is broken
to see why, read the manual, RTM
each car make and models and years, vary.
but there are 3 types.
some use a simple cable, and can just come loose
its all in the FSM.
or
at alldata dot com, its all there.
same thing at mitchels too.
ondemand5 dot com.

Oct 08, 2013 | 2005 Nissan Sentra

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

Heater control to feet has never worked 95% of the time since new


sounds like vent flap valve wire has come off (under dash beried in plastic cowling.....

Feb 14, 2010 | 2006 Honda CR-V

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

2 Answers

Heat won't come out of the vents at your feet in '98 Chev.Siverad


Look up in the vents with a flashlight, some times an errent object placed on the dash finds its way down the defroster vent and into the plenum. These items tend to keep the doors that dirrect the air from moving.

Sep 10, 2009 | Chevrolet Silverado 1500 Cars & Trucks

1 Answer

Front defrost vent doesn't blow any hot air.


You may need to replace the mode selector switch.

Oct 18, 2008 | 1998 Ford Taurus

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