Question about 2003 Chevrolet TrailBlazer

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Replacement of blend door on rear ac

Rear ac actuator door replacement 2003 trailblazer

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

chiquititas
  • 1010 Answers

SOURCE: AC is blowing out HOT air... How to get to the Blend Door to check it?

No, you just need to fill freon gas.

Posted on Jun 25, 2008

  • 1 Answer

SOURCE: How to remove rear door panel on 2003 Chevrolet Malibu?

not sure but have the same prob.

Posted on Aug 13, 2008

  • 1 Answer

SOURCE: Blend door

ok first put you front seat down and back raise steering wheel . now lay on you back with you head in the drivers floor board. look up see 2 screws remove them and the panel they hold on . look to left main wire harness needs to be moved to the right , up and behind it is th blend actuator 7/32 socket to remove it then manually turn the white peg , total labor 30 min

Posted on Dec 15, 2008

aaangie220
  • 202 Answers

SOURCE: 2004 suburban rear a/c only blows hot air

ase mechanic:
there are separate actuators for the blend doors. one for heat and one for cool. they work opposite and in conjuction with each other, if that makes any sense. ones open, ones close, for each different climate. sounds like the the cold one isn't opening in the rear.

Posted on Jan 29, 2009

  • 1 Answer

SOURCE: 2003 Chevy Trailblazer - Rear Heat/AC Controls Don't Work

Sorry, I don't have an answer, but have the same problem. Did you ever figure out what was wrong?

Posted on May 26, 2010

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1 Answer

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I am working on a 2003 Chevy Trailblazer and the vents just blow out warm air, and will not change to the defost vents or the floor vents. Can this be the blend door actuator? And if so where is it


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Oct 23, 2011 | 2003 Chevrolet TrailBlazer

1 Answer

2003 Ford Expedition rear A/C has a knocking sound when setting fan speed or temp.


You need to replace the blend door actuator, a very common problem on the Expys. Remove the passenger side interior panel, between the middle and rear seats. You will also have to unbolt the seatbelt - overall not a hard job. Just remember to have the gears on the new actuator set in the correct position as the one you pulled out or the door will tend to overtravel. ]
There are 2 actuators in that area, just to on the rear air to find out which one is making the problem.
The gears in the actuator are plastic and strip very easily, making the sound. I found a replacement at Advance Auto, but Im sure most parts houses have them.

Feb 13, 2011 | 2003 Ford Expedition

2 Answers

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Hello! One of the Blend Door Actuators is defective...There are three different Actuators...See picture #1...I would suggest that The Mode Door Actuator is defective...It is DORMAN Part # 604115...Cost = around $50..It is on the lower left side of the pictured HVAC unit....The part is shown in picture #2....After replacing The actuator...Pull the heater fuse...Start the engine...Run for 45 seconds...Turn off key...Replace fuse...This allows the computer to learn the new part...Guru...saailer




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Jan 03, 2011 | 2002 Chevrolet TrailBlazer

1 Answer

My Air Condition is only blowing hot air in the front, but cold in the rear. Could anyone give me a start in correcting this problem? Thanks


possible blend door actuator faulty, or a faulty blend door. This door switches from hot to cold vents. On expeditions equipped with rear AC front and rear AC have seperate actuators. Hopefully this helps!!

Mar 31, 2010 | 2001 Ford Expedition

1 Answer

Rear a/c


the problem is in the blend door actuator, in this car, it is electric no a vacuum one, that's way it clicks , because the plastic gears inside the actuator brake , the door is in the heat position and wants to move the the cool position.. the solution is replace the actuator, if you are a handy person you can do it by your self..it doesn't require to discharge the system, just pull the trim panel and follow the click noise , they have two small screws holding it..hope this was very helpful..

Aug 04, 2009 | 2003 Chevrolet TrailBlazer

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