'04 JGC Limited AC Blend Door Issue - JeepForum.com
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Unread 07-13-2013, 05:23 PM   #1
specia1k
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2004 WJ 
 
Join Date: Sep 2011
Location: Jacksonville, FL
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Wj '04 JGC Limited AC Blend Door Issue

Bought the Blen Dor replacement blend door's to repair my '04 JGC Limited with driver and passenger temp knobs. I cut out the access behind the glove box, but found that the far white knob that rotates what I believe to be the passenger blend door won't move. You can hear the motor try to turn, but it klicks as if the knob is stuck. The near motor and knob that runs the driver blend door works. There appears to be no access to the faulty motor and knob (farthest from cut access opening) without pulling the whole dash.

Thoughts?

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2002 Jeep Grand Cherokee Sport 2x4 4.0L
1998 Jeep Grand Cherokee Laredo 2x4 4.0L
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Unread 07-13-2013, 06:05 PM   #2
vegaseric
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2001 WJ 
 
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Did you do the recalibration process? The farthest knob would be the driver's side, right?

http://www.jgcparts.com/JGCParts_AZC_Recalibration.html
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Unread 07-13-2013, 11:17 PM   #3
rdkendrick
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2003 WJ 
 
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Here is the test: http://www.wjjeeps.com/climate.htm

Keep in mind that if the motor doesn't find the resistance for the door to stop, (in other words, fails) it will shut down that side until power is turned off and turned back on again.
Since you already have it cut open, put the blend doors and shaft in (if you haven't already) and let it calibrate, then run the test. Or, you can just power it on and change it back and forth from hot to cold. If the passenger motor doesn't move, a last ditch effort will be to unhook your battery for about 20 minutes, re-hook it, then start your car and run the dual blend doors from hot/cold.
I replaced my blend doors two or three years ago. Last month, I have had my car blow hot air on one side, twice in a month, and the only thing I could do was unhook my battery for a bit, and it went back to normal.
If the actuator motor for the passenger side doesn't work, it will require dash removal to replace that one. Sorry.

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Unread 07-14-2013, 04:25 AM   #4
specia1k
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For confirmation, the Driver and Passenger controls on the dash are as they seem, the drivers on the left closest to the driver, and passenger on the right? But inside the blend doors and associated actuator motors are opposite. The motor and blend door to the glove box is for the driver side, and the farthest blend door and motor that inaccessible (without dash removal) is for the passenger side, correct?
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2004 Jeep Grand Cherokee Limited 2x4 4.0L
2002 Jeep Grand Cherokee Sport 2x4 4.0L
1998 Jeep Grand Cherokee Laredo 2x4 4.0L
"Three daughters, three Jeeps"
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Unread 07-14-2013, 09:59 AM   #5
Schlotzky
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Quote:
Originally Posted by specia1k View Post
For confirmation, the Driver and Passenger controls on the dash are as they seem, the drivers on the left closest to the driver, and passenger on the right? But inside the blend doors and associated actuator motors are opposite. The motor and blend door to the glove box is for the driver side, and the farthest blend door and motor that inaccessible (without dash removal) is for the passenger side, correct?
Yes, that is correct. You can re-calibrate by just unplugging the batter for a few minutes and then connecting again. If nothing else, you should see the motor move a few seconds after reconnecting the battery. If it makes a full turn but the door is still capable of being installed, you will be fine for a while, you'll just have to re calibrate again after you get the door installed.
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Unread 07-15-2013, 05:18 PM   #6
specia1k
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My problem is that I have a code 56, yet the passenger actuator motor tries to turn the blend door, but is unable to. I removed the door and the actuator will again try to I believe re-calibrate, but is unable to turn the white knob that connects the actuator motor with the door. Not sure what to do?
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2004 Jeep Grand Cherokee Limited 2x4 4.0L
2002 Jeep Grand Cherokee Sport 2x4 4.0L
1998 Jeep Grand Cherokee Laredo 2x4 4.0L
"Three daughters, three Jeeps"
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Unread 07-15-2013, 08:19 PM   #7
rdkendrick
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Quote:
Originally Posted by specia1k View Post
My problem is that I have a code 56, yet the passenger actuator motor tries to turn the blend door, but is unable to. I removed the door and the actuator will again try to I believe re-calibrate, but is unable to turn the white knob that connects the actuator motor with the door. Not sure what to do?
Sorry to say, but it SOUNDS like the motor is bad, or the gears inside the motor are bad. If that's the case, it is dash removal time. I don't personally know of any other way to replace the motor. You might try searching around to see if anyone has found a way.

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