Unusual WJ HVAC issue - Page 2 - JeepForum.com
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post #16 of 23 Old 07-08-2013, 06:10 AM Thread Starter
PumaZJ
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Strange update. One day this weekend the A/C was working perfectly, blowing nice and cold. Then yesterday I went out and it decided to not work again and only blow out heat. Pretty sure the doors are not broken but the actuator for the door is getting some funky signals. Maybe the HVAC controller itself?


1998 ZJ - 36's & bent unibody - RIP
2004 WJ - Expedition build
2011 A4 - DD
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post #17 of 23 Old 07-08-2013, 04:50 PM
rdkendrick
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Quote:
Originally Posted by PumaZJ View Post
Strange update. One day this weekend the A/C was working perfectly, blowing nice and cold. Then yesterday I went out and it decided to not work again and only blow out heat. Pretty sure the doors are not broken but the actuator for the door is getting some funky signals. Maybe the HVAC controller itself?
I had that happen to me twice last month. i finally cleaned my battery terminals up real good and shiny. Put some of that red terminal protector stuff on and the felt washers under the posts. Hasn't happened, since.
If you want to try replacing the HVAC controller, I think I saw someone that one for sale in the classifieds for around $80 or so.

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post #18 of 23 Old 07-16-2013, 07:39 AM Thread Starter
PumaZJ
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Just wanted to post an update. I pulled the actuator behind the glovebox and the shaft going into the blend door came out with it. :bigeyes:



Apparently, the new (aftermarket) actuator put too much pressure on the white plastic piece and broke it. Fortunately, I was able to pull the one off of the old blend door, swap it in, and plugged in the OEM actuator and all is working for now. Here is a pic of the broken plastic shaft.


1998 ZJ - 36's & bent unibody - RIP
2004 WJ - Expedition build
2011 A4 - DD
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post #19 of 23 Old 07-16-2013, 09:36 AM
rdkendrick
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Quote:
Originally Posted by PumaZJ View Post
Just wanted to post an update. I pulled the actuator behind the glovebox and the shaft going into the blend door came out with it. :bigeyes:

Apparently, the new (aftermarket) actuator put too much pressure on the white plastic piece and broke it. Fortunately, I was able to pull the one off of the old blend door, swap it in, and plugged in the OEM actuator and all is working for now. Here is a pic of the broken plastic shaft.
First time I have seen a broken actuator. Be happy it was on that side :-) Glad you got it fixed.

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post #20 of 23 Old 07-16-2013, 12:14 PM Thread Starter
PumaZJ
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First time I have seen a broken actuator. Be happy it was on that side :-) Glad you got it fixed.

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Seriously. The actuator wasn't broken, I believe it just placed too much pressure on the plastic blend door shaft and broke it. The bad thing is that the same aftermarket actuator is also on the rear door. Hope it holds up!

1998 ZJ - 36's & bent unibody - RIP
2004 WJ - Expedition build
2011 A4 - DD
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post #21 of 23 Old 07-16-2013, 12:21 PM
rdkendrick
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Originally Posted by PumaZJ View Post

Seriously. The actuator wasn't broken, I believe it just placed too much pressure on the plastic blend door shaft and broke it. The bad thing is that the same aftermarket actuator is also on the rear door. Hope it holds up!
A couple of months is not long for the blend door shaft to break. Did whoever replaced the blend doors give a warranty, or did you do it? That's why I went with the aluminum doors and shaft :-)

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post #22 of 23 Old 01-28-2014, 07:03 AM
Kmacon
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Any update on your problem/solution? I've been thinking along the same line. Just finished the tare-down where I replaced blend doors and recirc door. Afterwards I am getting erratic temp control. I can get high heat or no heat from the same setting, say 70 F. If I go to high temp setting then back to 70 I get high heat. If I go to Lo setting then back to 70 I will have no heat. With each of these adjustments I hear the doors change but the final position of something is different and the system is not adjusting the temp back to 70. This makes me think as you were that the controller is not functioning properly. Any new info you can post?
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post #23 of 23 Old 01-28-2014, 03:41 PM
rdkendrick
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Originally Posted by Kmacon View Post
Any update on your problem/solution? I've been thinking along the same line. Just finished the tare-down where I replaced blend doors and recirc door. Afterwards I am getting erratic temp control. I can get high heat or no heat from the same setting, say 70 F. If I go to high temp setting then back to 70 I get high heat. If I go to Lo setting then back to 70 I will have no heat. With each of these adjustments I hear the doors change but the final position of something is different and the system is not adjusting the temp back to 70. This makes me think as you were that the controller is not functioning properly. Any new info you can post?
Did you try the calibration procedure? Bottom of the page: http://www.wjjeeps.com/climate.htm

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