Question about 1999 Chevrolet Silverado 1500

1 Answer

Vent door sticks

When i try to switch to temp to cold it doesn't get cold. the doors that switch the temps are stuck. how do i fix it

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  • Chevrolet Master
  • 14,380 Answers

Could be just stuck or it may be bad,here's a link on how to replace,here's the part.

Posted on May 04, 2013

  • chris hurt May 04, 2013

    ok thank you very much. that helps

  • chris hurt May 04, 2013

    my next question is how to replace that part

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6 Suggested Answers

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Posted on Jan 02, 2017

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juncro
  • 467 Answers

SOURCE: 2004 Chevrolet 2500HD blows hot air out one side

check the fuse check the relay check the compressor and freon level

Posted on Jul 16, 2009

maygemini
  • 147 Answers

SOURCE: WILL NOT SWITCH AIR FLOW STUCK IN DEFORST VENT

when your car is in defrost it has an ac cycling it removes the moisture then sends the air over the heater core depending on how warm you set it you can feel warm or cold but the ac is always cycling...ridding the moisture...you need a good ac tech it will be okay...its just expensive going into the heater core if needed...!

Posted on May 07, 2009

emissionwiz
  • 76649 Answers

SOURCE: The HVAC does not switch

The blend door is controlled by an electric stepper motor, very likely the motor is defective or the door is stuck.

Posted on Sep 05, 2008

  • 159 Answers

SOURCE: how do i know if the temp blend door is broke?

Change the temperature of the air and see if the temperature changes. If it doesn't change, then you probably have a bad blend door.

Posted on Dec 09, 2009

johnjnail
  • 1702 Answers

SOURCE: 1999 Chev Suburban 1500 with front and rear ac -

the truck has two evaporator cores one for the front unit one for the rear unit also two expansion valves, one for the front one for the rear.

check the large a/c line going to the rear unit if the line is warm with the A/C compresser running replace the rear expansion valve.

if the line is cold then replace the rear units blend actuator motor. if the frount unit is cold then most likely the blend actuator is the problem, remove the cover from the rear unit and you will see the actuator mounted on the side of the air handler box.

the best way to indentifie the unit is to buy one so you know what your looking for.

let me know if there is any thing else you need.

Posted on Jun 26, 2011

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In all modern cars there is a tiny DC electric motor driven gear drive that moves a plastic door that blends heated and cooled air from the AC and the heater core, this is called (interestedly enough) the air temperature control blend door actuator. The motor that moves this door fails because the door starts sticking from warping, most common complaint is no heat but it can be no AC as well. To replace these parts (blend door and blend door actuator) you must remove the entire dash from the car. Always have this problem confirmed by a dealer or qualified repair shop as it is a very expensive repair.

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The problem is likely related to a failed air temperature control blend door, it is likely stuck or the electric actuator is defective which is most often caused by a sticking warped blend door in the air ducting. Yo replace these parts requires the entire dash be removed from the car, about a $1000.00 job.

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Are you sure you checked the temp door ?Is it hot air ,like the heater?First check the ac compressor to see if it is actually turning,then check the large ac lines near the firewall near the windshield to see if they are cold,and sweating.If they are that rules out freon problem.The temp door might not be moving,check all selections on ac control and watch is door and see if one of them doesn`t move.If one door doesn`t move then it is the one you need to fix,if I can help,let me know.roniecon@gmail.com

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Could also be that you are out of Freon, Compress may have a leak. Try it on cold setting in the early morning if its not even cool and heats up fast then Rob is correct. ITs a damper/ temp problem which is eternal. You can tear apart you dash and check on the damper (looks like a doggie door) make sure nothing is in the way and the hinger isnt broken.....I hope you can fix it yourself..

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