Blend door actuator problem

LARRYDANGELO

MEMBER
2003 HUMMER H2
0.6L
V8
4WD
AUTOMATIC
104,000 MILES

AC and heat blowing only through defroster vents. I have tried all of the reset options and none have worked to solve this problem. Can you please provide some guidance as far as which blend door actuator to replace along with instruction on how and where to gain access with applicable part number? Your assistance is greatly appreciated.
Thanks,
Larry D’Angelo

7 Replies

LARRYDANGELO

MEMBER
4 POSTS
2003 HUMMER H2
6.0L
V8
4WD
AUTOMATIC
102,000 MILES

Recently all heat and A/C started blowing only through defroster vents/no air coming through both dash and rear vents. Could this problem be solved by replacing the blend door actuator on the passenger side? If so, how is this actuator accessed in the dash? Appreciate any guidance you can give to solve this problem.

Thanks,
Larry D’Angelo

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Sunday, September 23rd, 2018 AT 5:40 PM (Merged)

KEN L

MASTER CERTIFIED MECHANIC
48,363 POSTS

Hello,

Yes this does sounds like you have a mode actuator that has gone out. Here is a guide to give an idea of what you are in for when doing the job:

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

Here is the location for your car (below) I have included all blend door actuators for future reference. The first one it he one you want to do. (mode)

Check out the diagrams (below).

Let us know what happens and please upload pictures or videos of the problem.

Cheers, Ken

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Sunday, September 23rd, 2018 AT 5:40 PM (Merged)

KEN L

MASTER CERTIFIED MECHANIC
48,363 POSTS

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Sunday, September 23rd, 2018 AT 5:40 PM (Merged)

LARRYDANGELO

MEMBER
4 POSTS

Yes, I reviewed the schematics provided but I am still unclear as to which actuator controls air direction in the cab and the correct part number associated with it? I just want some verbal clarification that this particular actuator is the one to the far right near the passenger window post? I have seen several iterations of this on-line which adds to the confusion. I would appreciate a little more information just to be clear.
Thank you for your assistance.

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Sunday, September 23rd, 2018 AT 5:40 PM (Merged)

KEN L

MASTER CERTIFIED MECHANIC
48,363 POSTS

Hey Larry,

It is the mode actuator that is closest to the gas pedal #7 in the diagrams. Look under the dash on the drivers side about the throttle pedal and you will see it. Move the seat all the way back before you begin. You might need a 5.5 mm or 7 mm socket to remove it.