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Old 07-13-2008, 05:37 PM   #1
Paul Greathouse
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Default Rear AC blows hot air


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I'm assuming it will be the same on a Yukon as on a Tahoe. On my wifes 03' Yukon the rear air conditioning blows hot air no matter what the setting on the overhead rear controller. The front AC works fine. Anybody dealt with this problem yet?

Last edited by Paul Greathouse; 07-15-2008 at 10:03 AM.
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Old 07-17-2008, 09:27 PM   #2
Holikz
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Originally Posted by Paul Greathouse View Post
I'm assuming it will be the same on a Yukon as on a Tahoe. On my wifes 03' Yukon the rear air conditioning blows hot air no matter what the setting on the overhead rear controller. The front AC works fine. Anybody dealt with this problem yet?
The actuator most likely not working, you need to replace it since it cannot be fixed. it should cost around $80 to $120 from the dealer. It's easy to change it.

Note. just make sure you change the correct actuator since the there's two of them, one changes the air from top to bottom and the other the air climate.
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Old 07-18-2008, 03:38 AM   #3
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Originally Posted by Holikz View Post
The actuator most likely not working, you need to replace it since it cannot be fixed. it should cost around $80 to $120 from the dealer. It's easy to change it.

Note. just make sure you change the correct actuator since the there's two of them, one changes the air from top to bottom and the other the air climate.

Thanks for the reply. Where in the vehicle is the actuator located and how do I tell the two different ones apart?
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Old 07-20-2008, 03:26 PM   #4
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Thanks for the reply. Where in the vehicle is the actuator located and how do I tell the two different ones apart?
Here's a link to a the picture where it will show you.

http://cid-78eb12eecf6c4e5a.skydrive...#37;20havc.jpg
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Old 07-21-2008, 09:00 AM   #5
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Originally Posted by Holikz View Post
Here's a link to a the picture where it will show you.

http://cid-78eb12eecf6c4e5a.skydrive...ear%20havc.jpg

Thanks for the picture, that definately pin-points it. Never would have guessed it would be back there. Is the picture of your own vehicle or is it from a site somewhere on the web that supplies repair tips?
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Old 07-22-2008, 06:55 PM   #6
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Thanks for the picture, that definately pin-points it. Never would have guessed it would be back there. Is the picture of your own vehicle or is it from a site somewhere on the web that supplies repair tips?
I was on the same boat when I was trying to find out where it was, the picture came from of another member but I have the same vehicle.
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Old 07-23-2008, 05:07 PM   #7
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Just FYI, I had the exact same problem on our 2003 with the auto a/c controls.

Pull the panel off and look at the hot/cold actuator shown in the picture. Note the round indictor on the top with the slot in it. Put the a/c control to full cold and see if that thing turns or not. Switch it to full hot and see what it does then. If it turns smoothly from one end to the other, then the actuator is probably fine. If it kind of hunts, then that (could) be the problem as that is what mine was doing.

Compare it to the operation of the indicator on the floor/ceiling actuator to see how it should act.

On ours, I replaced the actuator itself and it fixed the problem.

Alternately, it could be the control module located between the hot/cold and floor/ceiling actuators. If I remember, it has gray and blue wiring harnesses on the bottom. I had replaced mine before doing the actuator and it did no good...stuck on cold. But, I've read where that fixed some people's problems.

I ordered the actuator from rockauto.com (AC Delco part #1572972) and it was around $90.

Hope this helps,
Scott

Last edited by east302; 07-23-2008 at 05:27 PM.
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