Blend door actuator?

2007 CHEVROLET BLAZER
250,000 MILES • 4.2L • 6 CYL • 4WD • AUTOMATIC
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ANDREW HAMAN
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I believe i have an obstruction in my door blend arm area and it will not move from dash and floor. I hear a loud clicking noise coming from the actuator and also can feel it if i put my hand on it so i know its the one. I do believe a micro-sd adapter fell into my vent from above (dash) and now it is stuck.
I disconnected my battery and then reconnected my battery moments before this began to happen. i do not know if this is related, i have not taken the actuator off and tested to see if the blend arm will move.
My question is how do i get into the blend door arm compartment? I need to remove the obstruction or at least look to see because the actuator is in a very tricky spot for removal. also, i did try to turn the metal circle on the actuator (not sure if it moves ), but it will not turn.
Thank you very much.
Jan 22, 2017 at 5:45 PM
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ANDREW HAMAN
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I have fixed it! the arm was stuck. i took the actuator off, re positioned the arm, and it started working.
Jan 22, 2017 at 7:45 PM
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WRENCHTECH
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It may stop again. The clicking noise was the plastic gears in the actuator stripped. Here is a guide and a video that will help you fix it.

https://www.2carpros.com/articles/replace-blend-door-motor

and

https://youtu.be/Eqf-H3COtSo

Please run down these guides and report back.
Jan 22, 2017 at 8:29 PM
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SOONERS1FAN
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Where is the blend door for 2004 chevy blazer located and how do you get to it.
Jan 4, 2021 at 8:59 AM (Merged)
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HMAC300
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the blend door is on the passenger iside under the dash. you'll just have to feel around there andsee if the motor is stuck or not working.. if there is a panel covering the under dash it wil be held by screws or push pins or both.
Jan 4, 2021 at 8:59 AM (Merged)
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EDLYNCH
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Is the location of the blend door actuator the same for right hand drive as it is for left hand drive and if not what is the location?
Jan 4, 2021 at 9:00 AM (Merged)
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WRENCHTECH
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I can tell you where it is for left hand drive because that is the only type we have in the US. It is on the top of the HVAC housing and requires removing the dash to access it.
See image:
Image (Click to enlarge)
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Jan 4, 2021 at 9:00 AM (Merged)
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YARDDOGZ
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the blending door for the ac just keeps going back and forth from cold air to heat , how do i control this ?
Jan 4, 2021 at 9:00 AM (Merged)
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JACOBANDNICKOLAS
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Has anything come disconnected on it?
Jan 4, 2021 at 9:00 AM (Merged)
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YARDDOGZ
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nothing loose or broken even replaced the 3 cluster of switches on dash replaced control module, and still all it did was back and forth , so i found the hot wire to the motor behind glove box the yellow wire and put a switch on it now when i want hot air i just turn switch on until i get hot then shut it off and vice verus for cold air seems to work ok this way. thank you for your reply.
Jan 4, 2021 at 9:00 AM (Merged)
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JACOBANDNICKOLAS
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I'm glad you figured a way out to make it work. If you have questions in the future, let us know.

Joe
Jan 4, 2021 at 9:00 AM (Merged)
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LEWISR5
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Hot all the time. I need the location to replace temperature blend door actuator.
Jan 4, 2021 at 9:00 AM (Merged)
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KASEKENNY
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Hi,

Attached is the location and procedure for this actuator. Let me know if you have questions and I will be happy to assist further. Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed. Thanks
Images (Click to enlarge)
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Jan 4, 2021 at 9:00 AM (Merged)
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KISSYBEAR2002
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I can't find the actuator. I've looked and looked. I found 2 different actuators but neither is the one I'm looking for. The ones I found are vacuum ones. I'm looking for the electrical ac door actuator. Can you please help?
Jan 4, 2021 at 9:00 AM (Merged)
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JACOBANDNICKOLAS
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First, is this a full size blazer or S-10 Blazer. If full size, everything I find is vacuum actuated. See attached image.
Image (Click to enlarge)
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Jan 4, 2021 at 9:00 AM (Merged)
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KISSYBEAR2002
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It's s10. I need to find other where it is located
Jan 4, 2021 at 9:00 AM (Merged)
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KISSYBEAR2002
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S10. Exactly where would the ac door actuator be?
Jan 4, 2021 at 9:00 AM (Merged)
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JACOBANDNICKOLAS
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I looked up for an S10 and the vacuum schematic is the same. Which door are you looking for? Can you describe the problem?
Jan 4, 2021 at 9:00 AM (Merged)
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KISSYBEAR2002
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It only blows defrost in every position except the off position won't change except to turn it off . Was told to change the ac actuator. But can't locate it. We bought the part. It has a round cylinder that turns gears
Jan 4, 2021 at 9:00 AM (Merged)
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KISSYBEAR2002
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Never mind. Advance gave us the wrong part. It is all vacuum. And it's not even the actuactor. A couple hosesmall are busted. Thanks for your assistance though.
Jan 4, 2021 at 9:00 AM (Merged)
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KISSYBEAR2002
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Do you have a diagram of the vacuums for the 95 s10 blazer?
Jan 4, 2021 at 9:01 AM (Merged)
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JACOBANDNICKOLAS
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I thought it was all vacuum. As far as a schematic, I sent the only one for the HVAC system that is listed in my manual. I checked the S10 and it's the same one.

Are you looking for something different?
Jan 4, 2021 at 9:01 AM (Merged)
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ED SCARFF
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I have the same problem with my 96 S10. Can you send the vacuum schematic?
Jan 4, 2021 at 9:01 AM (Merged)
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STEVE MEENTS
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Need to repair air plenum door inside air flow box.
Jan 4, 2021 at 9:01 AM (Merged)
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STEVE W.
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Which one? Most of them require you to pull the dash and the HVAC box to do anything. Have you tested to be sure it is not just a bad actuator?
Jan 4, 2021 at 9:01 AM (Merged)
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STEVE MEENTS
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Got door plenum to move freely. I got the old actuator out with some difficulty ( big hands ) bought new one and am having hard time aligning and installing. Do I need to pull dash out?
Jan 4, 2021 at 9:01 AM (Merged)
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STEVE MEENTS
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On this 2000 Blazer the actuator sits at the very top next to dash board.
Jan 4, 2021 at 9:01 AM (Merged)
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STEVE W.
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OK you're working through the glove box on the temperature actuator correct? There isn't much room but you can get it in there with a bit of fiddling.
Jan 4, 2021 at 9:01 AM (Merged)