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Unread 07-22-2014, 10:27 AM   #106
Thomahawk
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2004 WJ 
 
Join Date: Mar 2011
Location: Oslo, Norway
Posts: 7,424
Just did the thing, pics in my build thread.

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2004 Grand Cherokee Overland 4.7 HO Quadradrive
95 ZJ Limited 5.2 Winter Project
Sold 94 ZJ Laredo 4.0 Winter Beater
R.I.P. 2000 Grand Cherokee Limited, 4.7 V8, Quadradrive, Shale Green Metallic, Agate/Carbon interior, Well modded and highly missed :(

Buildthread [url]http://www.jeepforum.com/forum/f197/jeep-norway-2th-buildt-overland-upgrade-1813490/[/url]

MONEY WILL CONTINUE TO BE THROWN INTO THE RIG UNTIL CONDITION AND SATISFACTION IMPROVES!!!
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Unread 08-09-2014, 08:46 PM   #107
canadianboomer
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2000 XJ Cherokee 
 
Join Date: Aug 2014
Location: Maple Ridge, BC
Posts: 1
I just did this to mine but in "Recurculating" mode

Thanks for this awesome post. I followed it and was successful.

The hardest part of the job was getting the 3 semi rusted screws out of the fan! Once the fan was down, we reached up into the hole and positioned the broken recirc door into the recurculating position. I held it there as my friend slid a small wood wedge that he had made into the plastic "grill" thing behind the glove box. It fit perfect and the door was solid shut. A bit of hot glue on the wood wedge and plastic grill and it was done.

The AC is blowing like a hurricane and super cold!

Thanks again from BC Canada
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Unread 09-30-2014, 01:01 PM   #108
biffs
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2000 WJ 
 
Join Date: Feb 2014
Location: Ottawa, ON
Posts: 157
Quote:
Originally Posted by robrilla View Post
So how do you "correctly" fix the recirculation door problem? I'm taking apart the dash anyway to repair codes 54 / 56.

Thanks,
-Rob
Quote:
Originally Posted by Schlotzky View Post
PM sent.
Can someone provide more information on this rather than in PM? I'd be curious how to fix it properly. Being in Canada we get both very cold and very hot, and I don't want to 'flip the switch' twice a year. I'm very likely pulling the dash at some point to install some new stuff and relocate all of my wiring for remote start, install a tablet, power inverter, etc and would like to do it right.

Thanks
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Build thread: http://www.jeepforum.com/forum/f197/biffs-build-thread-2000-wj-2102889/
(Not sure why I can't make that a real link)
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Unread 09-30-2014, 02:00 PM   #109
Jeeples
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2000 WJ 
 
Join Date: Jul 2006
Location: forum/f310/, UT
Posts: 4,841
Quote:
Originally Posted by biffs View Post
Can someone provide more information on this rather than in PM? I'd be curious how to fix it properly. Being in Canada we get both very cold and very hot, and I don't want to 'flip the switch' twice a year. I'm very likely pulling the dash at some point to install some new stuff and relocate all of my wiring for remote start, install a tablet, power inverter, etc and would like to do it right.

Thanks
Here's the procedure for pulling the dash and HVAC sub assembly:

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

As for replacement parts, I think the Dorman HVAC sub assemblies (both the blend door and recirc door) offer the best bang for the buck, even compared to the popular aluminum replacements found on eBay. They address the root cause of door failure, which is the blend door drive connector stop tabs. The drive connector is what attaches the blend door motors to the blend door shaft, the OE doors have a 3 MM stop tab with tends to break and allows the motor over rotate and eventually break the blend door shaft. The Dorman doors use a thicker 4 MM stop tab.
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Unread 11-27-2014, 04:31 PM   #110
NomadJoe
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2001 WJ 
 
Join Date: Nov 2014
Location: Concord, CA
Posts: 17
Great quick fix. After fixing my blend doors I was still only getting about 20% power from the AC and heater so I just completed this fix. But instead of removing the recirc door or drilling a hole in it and zip tieing it, I just used the extra aluminum tape that came with the blend door kit and taped it into the recirc position. Now it blows strong hot and cold in every vent configuration correctly, though I lost the driver-passenger dual climate control feature with the previous blend door repair. Dual climate control is a ridiculous feature anyway. I chose to fix it to the recirc position because I want full AC for the blistering California summer heat and full heat for the winters in the mountains. I don't see a need to route outside air in unless perhaps all 4 windows fail and can't be opened. Not much chance of that.




Last edited by NomadJoe; 11-28-2014 at 02:02 AM..
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Unread 12-11-2014, 01:33 PM   #111
cyber-junkie
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2001 WJ 
 
Join Date: Jul 2010
Location: Fl
Posts: 66
Mine 01 Limited shows fault code 52 (recirc door travel to far) the recirc door will not close anymore as I use it in heavy traffic to cut off the fumes from the cars ahead of me, and after I stop and shut off the WJ, It sounds like one of the door(s) opening and closing, it does this a few times then stops...questions, is this problem the recirc door that is broken or is the actuator broken? The blend doors seem to working ok (I think) as I can get A/C or Heat from the system. If it's the recirc door that's broken, why does the actuator keep trying to close or open it? Or are there two actuators, one for the blend door and one for the recirc door?
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Unread 12-12-2014, 05:16 PM   #112
NomadJoe
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2001 WJ 
 
Join Date: Nov 2014
Location: Concord, CA
Posts: 17
There is just one actuator (servo) for the recirc door and one for the blend door if you have single climate control, and two if you have dual control. They go through periodic calibration and that is what you are hearing. The "travel to far" fault which is caused by a design flaw and has a 100% failure rate on WJ's. I'm just repeating what I read above but there is a small nub that limits how far the doors move. This breaks off and then puts the stress of the actuator servo on the doors themselves which then also break. Sounds like your actuator (servo) is still working but the stops are broken. If the actuator/servo was not responsive it is a different code. A few people have reported bad actuators, but the broken stops and doors is far more common and is almost certainly the problem with the fault codes you are getting. Read back though these 8 pages in this thread as well as the various blend door threads and it will make sense. It's a $1000 or more repair at the dealer, or as little as $50 and 1 hour easy DIY.

http://www.jeepforum.com/forum/f274/...-easy-1437620/
http://www.jeepforum.com/forum/f310/...x-kit-1165833/
http://www.jeepforum.com/forum/f9/ho...repair-464741/
http://www.jeepforum.com/forum/f310/...-door-1272066/
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Unread 12-12-2014, 07:43 PM   #113
cyber-junkie
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2001 WJ 
 
Join Date: Jul 2010
Location: Fl
Posts: 66
Thanks NomadJoe, I live in Fl and like the recirc as it tends to get very hot here and I like blocking the exhaust fumes from the car in front of me, now will the defrost still work? I have noticed it will come off recirc when the defrost is turned on.
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Unread 12-14-2014, 07:25 PM   #114
drpaul311
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1999 WJ 
 
Join Date: Jul 2014
Location: anza, CA
Posts: 42
Quote:
Originally Posted by tim11 View Post
I have a Grand Cherokee LTD 2004 and I am not getting any hot or cold air anymore (just a little air is flowing). I believe the blend door and the recirculation switch broke and I am getting error codes 52 54 and 56. Will the described fix work for my model without taking the dash off ? Thanks for your reply.
your blend doors are toast! been there done that!

you can buy a kit online that has aluminum doors rather than plastic and you get new shafts. all you do is cut a W looking thing from the top of the heater box. you have access to the whole unit and just replace it. the kit comes with ducting tape. don't do what I did however, i inadvertently threw away my heater box piece. i had to spend another 150 to buy a new top part of the heater box and cut out a new piece for mine.

if you need a picture of where to do this, i can send you one. i didn't have heat on the passenger side for about three years. sucked every time we took it to Utah during the winter when it was 40 below zero! then i replaced the heater/ac head unit and then i lost heat on the driver side. i was quite hestitant to do this repair but once i bought the kit, i saw it was a piece of cake.

that is literally maybe a one hour repair.
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Unread 12-15-2014, 04:00 PM   #115
NomadJoe
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2001 WJ 
 
Join Date: Nov 2014
Location: Concord, CA
Posts: 17
Quote:
Originally Posted by cyber-junkie View Post
Thanks NomadJoe, I live in Fl and like the recirc as it tends to get very hot here and I like blocking the exhaust fumes from the car in front of me, now will the defrost still work? I have noticed it will come off recirc when the defrost is turned on.
In Florida you shouldn't have much need for actually defrosting things, but yes just use it with the heater on. If you are wanting to defog, use the Ac with it. The ac removes moisture from the air.
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