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Old 10-28-2009, 07:01 PM
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Climate Control problems

Anyone ever have the issue where the vent selector will not change where your air is coming from? sometimes it just stays coming from the defroster vents and eventually will correct itself to where i set it.
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Old 10-28-2009, 07:05 PM
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Re: Climate Control problems

Very VERY common problem mate on WG/WJ.
From what I remember, it's a bastard to fix.
No doubt someone will chime in with more info.
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Old 10-28-2009, 07:20 PM
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Re: Climate Control problems

If you own a WJ it sounds like your "blend door" is failing. If you have the dual climate control setup, you are looking at a repair bill of over $1k because in order to fix it, you'll have to rip the entire dash apart.

http://www.wjjeeps.com/hvac_blend_remove.htm

If you own a ZJ it could be an issue with a vacuum system leak, as if I recall correctly, the vents are vacuum controlled and the default without enough suction is the defrosters.
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Old 10-28-2009, 08:48 PM
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Re: Climate Control problems

hmm ill have to check vacuum lines. i have a wj but i know i have bad lines somewhere since i had to temp seal one a while back and my cruise control is dead right now. im gonna strip the engine bay after i get back from kuwait in aug and give her a proper tune up before i start the project. off topic but for an 03 wj with the I-6 anyone know if the Avenger supercharger is decent? im looking to add some power to it among other things.
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Old 12-25-2009, 05:47 PM
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Re: Climate Control problems

if I remember right check the vacuum line under the battery box that controls the cruise and heater controls
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Old 12-25-2009, 10:28 PM
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Re: Climate Control problems

blend doors cause the heat on one side or the other to fail, not affect where it comes out of. go to www.wjjeeps.com and look up the procedure to check the climate control for codes (if its a limited) if its NOT a limited then you don't have to worry about the blend doors...
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Old 08-18-2012, 05:40 PM
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Re: Climate Control problems

I know my vacuum line that goes into the firewall of a 2000 Grand Cherokee is leaking the AC only come out of the Defroster vent. Any quick fixes??
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Old 08-18-2012, 09:10 PM
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Re: Climate Control problems

The only way is to repair the leak, without (enough) vacuum the actuators won´t work.
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Old 08-19-2012, 08:11 AM
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Re: Climate Control problems

The blend doors failed on my 99 Limited. Did not affect WHERE the air went, just weather or not it had any heat when it got there. Spent a winter freezing since the drivers side only blew cold. Does NOT cost the $1k plus as indicated in an earlier post. There is a simple kit fix available online (with video instruction). Less than $100 and an hours time.
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Old 08-19-2012, 09:14 AM
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Re: Climate Control problems

I have a related but different issue. I just bought a 2003 Grand Cherokee, and it seems the the Climate Control (AZC Module) isn't working. I found a place to run a diagnostic, and "If a display segment fails to illuminate, the vacuum fluorescent display is faulty and the a/c heater control must be replaced." I'm not having any luck hunting up a replacement module - Any suggestions?

Thanks!
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Old 08-19-2012, 09:36 AM
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Re: Climate Control problems

Quote:
Originally Posted by Doug4230 View Post
The blend doors failed on my 99 Limited. Did not affect WHERE the air went, just weather or not it had any heat when it got there. Spent a winter freezing since the drivers side only blew cold. Does NOT cost the $1k plus as indicated in an earlier post. There is a simple kit fix available online (with video instruction). Less than $100 and an hours time.
The blend doors only let outside air going through the heater core, just bypass it or any position in between. It is the mode door which let the air go to windshield or dash vents or foot. The repair you are talking about is the heater treater and after this repair you only have one control zone (not that it matters that much though)
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Old 08-19-2012, 09:38 AM
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Re: Climate Control problems

Quote:
Originally Posted by KatK View Post
I have a related but different issue. I just bought a 2003 Grand Cherokee, and it seems the the Climate Control (AZC Module) isn't working. I found a place to run a diagnostic, and "If a display segment fails to illuminate, the vacuum fluorescent display is faulty and the a/c heater control must be replaced." I'm not having any luck hunting up a replacement module - Any suggestions?

Thanks!
So is only the display not working, or is the complete control panel dead?
In the last case, i would first check both fuses, #7 and # 20 on the junction block (under the steering wheel)
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