Blend door actuator?

Tiny
ANDREW HAMAN
  • MEMBER
  • 2007 CHEVROLET BLAZER
  • 4.2L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 250,000 MILES
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.
Sunday, January 22nd, 2017 AT 5:45 PM

27 Replies

Tiny
ANDREW HAMAN
  • MEMBER
  • 2 POSTS
I have fixed it! The arm was stuck. I took the actuator off, re positioned the arm, and it started working.
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Sunday, January 22nd, 2017 AT 7:45 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
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.
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Sunday, January 22nd, 2017 AT 8:29 PM
Tiny
SOONERS1FAN
  • MEMBER
  • 1 POST
  • 2004 CHEVROLET BLAZER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 101,000 MILES
Where is the blend door for 2004 chevy blazer located and how do you get to it.
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Monday, January 4th, 2021 AT 8:59 AM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
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.
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Monday, January 4th, 2021 AT 8:59 AM (Merged)
Tiny
EDLYNCH
  • MEMBER
  • 1 POST
  • 2000 CHEVROLET BLAZER
  • 4.7L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 97,000 MILES
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?
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Monday, January 4th, 2021 AT 9:00 AM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
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:
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Monday, January 4th, 2021 AT 9:00 AM (Merged)
Tiny
YARDDOGZ
  • MEMBER
  • 2 POSTS
  • 1998 CHEVROLET BLAZER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 115,000 MILES
The blending door for the ac just keeps going back and forth from cold air to heat, how do I control this?
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Monday, January 4th, 2021 AT 9:00 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,139 POSTS
Has anything come disconnected on it?
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Monday, January 4th, 2021 AT 9:00 AM (Merged)
Tiny
YARDDOGZ
  • MEMBER
  • 2 POSTS
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.
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Monday, January 4th, 2021 AT 9:00 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,139 POSTS
I'm glad you figured a way out to make it work. If you have questions in the future, let us know.

Joe
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Monday, January 4th, 2021 AT 9:00 AM (Merged)
Tiny
LEWISR5
  • MEMBER
  • 6 POSTS
  • 1997 CHEVROLET BLAZER
  • 3.4L
  • V6
  • 4WD
  • AUTOMATIC
  • 151,000 MILES
Hot all the time. I need the location to replace temperature blend door actuator.
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Monday, January 4th, 2021 AT 9:00 AM (Merged)
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
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
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Monday, January 4th, 2021 AT 9:00 AM (Merged)
Tiny
KISSYBEAR2002
  • MEMBER
  • 6 POSTS
  • 1995 CHEVROLET BLAZER
  • 4WD
  • AUTOMATIC
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?
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Monday, January 4th, 2021 AT 9:00 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,139 POSTS
First, is this a full size blazer or S-10 Blazer. If full size, everything I find is vacuum actuated. See attached image.
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Monday, January 4th, 2021 AT 9:00 AM (Merged)
Tiny
KISSYBEAR2002
  • MEMBER
  • 6 POSTS
It's s10. I need to find other where it is located
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Monday, January 4th, 2021 AT 9:00 AM (Merged)
Tiny
KISSYBEAR2002
  • MEMBER
  • 6 POSTS
S10. Exactly where would the ac door actuator be?
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Monday, January 4th, 2021 AT 9:00 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,139 POSTS
I looked up for an S10 and the vacuum schematic is the same. Which door are you looking for? Can you describe the problem?
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Monday, January 4th, 2021 AT 9:00 AM (Merged)
Tiny
KISSYBEAR2002
  • MEMBER
  • 6 POSTS
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
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Monday, January 4th, 2021 AT 9:00 AM (Merged)
Tiny
KISSYBEAR2002
  • MEMBER
  • 6 POSTS
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.
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Monday, January 4th, 2021 AT 9:00 AM (Merged)
Tiny
KISSYBEAR2002
  • MEMBER
  • 6 POSTS
Do you have a diagram of the vacuums for the 95 s10 blazer?
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Monday, January 4th, 2021 AT 9:01 AM (Merged)

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