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  #25  
Old 08-16-2012, 09:56 PM
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Re: a/c only from defrost vents

There is normally more air coming from the center vents then from the side vents. Also the drivers side has a bit more air then the passengers side. When a blend door is broken, you canīt regulate the temperature anymore, but it should not effect the air flow too much.
Did you try the actuator test described in one of my previous replies? After the battery reset, are there still fault codes present in the AC system? Try the calibrating again as well, since all actuators should move at that time.
Fuse #7 and #20 on the junction block under the steering wheel are feeding the AZC module.
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  #26  
Old 08-16-2012, 10:03 PM
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Re: a/c only from defrost vents

Quote:
Originally Posted by kbt74 View Post
I am going through the same issue. The actuator works intermittently, I now have it blowing out the main vents but it was stuck just coming out the floor. Are you able to give part number on the actuator? and more details as you go through this.

Kevin
Sorry Kevin, the sticker with the part number for the actuator was very worn an illegible. If I find the part number in my adventure, I will certainly pass it on to you!!
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  #27  
Old 08-16-2012, 10:07 PM
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Re: a/c only from defrost vents

Quote:
Originally Posted by Frango100 View Post
There is normally more air coming from the center vents then from the side vents. Also the drivers side has a bit more air then the passengers side. When a blend door is broken, you canīt regulate the temperature anymore, but it should not effect the air flow too much.
Did you try the actuator test described in one of my previous replies? After the battery reset, are there still fault codes present in the AC system? Try the calibrating again as well, since all actuators should move at that time.
Fuse #7 and #20 on the junction block under the steering wheel are feeding the AZC module.

I will revisit all of this again tomorrow including the test in post #19. It does really appear, though, that the unit is not getting any power. I hope that it's not a short of some kind.....or something wrong with the climate control unit.
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  #28  
Old 08-17-2012, 01:05 PM
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Re: a/c only from defrost vents

Quote:
Originally Posted by Frango100 View Post
There is normally more air coming from the center vents then from the side vents. Also the drivers side has a bit more air then the passengers side. When a blend door is broken, you canīt regulate the temperature anymore, but it should not effect the air flow too much.
Did you try the actuator test described in one of my previous replies? After the battery reset, are there still fault codes present in the AC system? Try the calibrating again as well, since all actuators should move at that time.
Fuse #7 and #20 on the junction block under the steering wheel are feeding the AZC module.
Ok Frank, I did your other suggestions. I did check both the #7 and #20 fuses and #7 was blown! It also was a 15 amp fuse rather than the 10 amp that the schematics said it should be. I replaced it with a good 10 amp fuse and the only difference it made was that now my interior dome lights come on when the doors are open (this was another "issue" on my list that is now solved unexpectedly). It did not effect the actuator in the least. I also recalibrated the system and performed the test you describe in post 19. Neither one of them had any effect on the actuator. Didn't move at all. I did the diagnostic test again and now have fault codes 13, 54 and 56. Any more ideas? Thank you once again for all of your time and effort!!!

Jenny
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  #29  
Old 08-17-2012, 04:29 PM
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Re: a/c only from defrost vents

The mode door motor works with a battery, but not with the control module. Or there is a problem with the wiring, or with the control module. It would be nice if you could find the AZC control module just to test it.
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  #30  
Old 08-18-2012, 09:41 AM
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Re: a/c only from defrost vents

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Originally Posted by Frango100 View Post
The mode door motor works with a battery, but not with the control module. Or there is a problem with the wiring, or with the control module. It would be nice if you could find the AZC control module just to test it.

Isn't the AZC control the box below the radio?
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  #31  
Old 08-18-2012, 09:53 AM
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Re: a/c only from defrost vents

Yes, its the panel with the control knobs/buttons, the control module is integral with it.
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  #32  
Old 08-18-2012, 10:11 AM
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Re: a/c only from defrost vents

Quote:
Originally Posted by jrsummersill1 View Post
I have a 00 jeep grand cherokee limited that is only blowing air from the defrost vents and has no heat whatsoever (not really worried about the heat right now). I know that the defrost vents are the default when there is a problem. I performed the azc self-diagnostic test and got the following codes:

13 = AI (Recirc) motor not responding
20 = Mode door travel range too large
22 = Left temperature door travel too large
24 = Right temperature door travel too large

Anyone know what these codes mean exactly and how to fix it? By the way, I also calibrated the azc system, and that didn't fix it.

Thanks!
I was just looking at your first message again. The code 13 is not the recirc door motor not responding, but the mode door motor. Code 20 was the recirc door travel too large. It made me a bit confused to have the mode door travel too large message when the actuator doesn't move at all. But i would first remove the AZC control panel and check all the connectors to be fitted securely. If they are, remove the connectors and check for loose/pushed back pins and/or corrosion of the pins and clean them with electrical contact cleaner.
Check both fuses 7 and 20 on the junction block again, they can have melted again.
Now the mode motor is the only one which doesn't move at all. When you did the calibration, could you hear the other motors (blend doors and recirc door) run?
I'm not sure if the blend door motors are the same as the mode door motor. You could easily remove the drivers blend door motor (behind the glove box) and if its the same, you could try it at the mode door position and check again.
But with all these messages, you could also have a problem with the AZC controller.
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  #33  
Old 08-18-2012, 04:46 PM
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Re: a/c only from defrost vents

On a side note, but still somewhat related, noticing a problem with fuse #7. It appears to be draining my battery. For the last few days when I started the jeep, it hesitated somewhat, like when your battery is dying. I did a cursory search on this topic and it too appears to be a common issue, but no one seems to have found a concrete solution except may its the BCM and something about the dome lights "going to sleep" when you close the door. Anyone else ever heard of this issue? I'm thinking of just pulling fuse #7 as i apparently did not have use of it before anyway.
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  #34  
Old 08-19-2012, 05:50 AM
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Re: a/c only from defrost vents

Fuse #7 is feeding the BCM, AZC module, Sentry key module and automatic headlight sensor. Since you have already problems with the AC system, it could be that there is a problem in the AZC module/wiring or one of the motors, causing a higher then normal drain. There are some modules who stay powered for a while after switching the ignition in off and there will always be some modules who continue to use a low power for feeding the memory functions.
The AZC for sure stays powered, because normally a minute or more after switching the ignition in off, the motors start turning and you can hear the doors moving. Measure the battery drain with ignition in off and then do it again with the AZC module disconnected. If there is a considerable difference, the problem is most probably related to the AZC module or motor(s)
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  #35  
Old 08-20-2012, 12:58 PM
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Re: a/c only from defrost vents

I think I found the battery drainage problem. Apparently when they painted the jeep, they taped up (it was literally pushed in and being held by the tape) the rear window button and I believe this may have been the culprit. I didn't notice it before because that fuse (#7) was blown and I never open that window. Anyway, I removed the tape and voila--no problems, well at least no more problems with that. There are plenty of other problems.

I will continue to work on the mode door actuator issue and post an update with any results or findings......
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