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acat84
Novice
Jun 19, 2012, 11:28 AM
Post #1 of 16
(6506 views)
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2012 jeep grand cherokee
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I appologize for the subject change, but I am trying to find some help on an A/C system in my 2012 jeep grand cherokee. A few times now the air will stop blowing out of the vents while riding down the road, the blower motor still operates at all speeds but no air is pushed through the vents. When this happens you get no air or heat, you can hear the blend doors switch positions if you change settings and levels, but still no air. It will resume after cutting the engine off and wait approx. an hour then restart engine. May not happen for another month or could happen next day. I know its a warranty thing but I'm not getting much help from the dealer since it doesn't act up in the 30 min. that they look at it. Thanks for any advice
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Discretesignals
Ultimate Carjunky
/ Moderator
Jun 19, 2012, 11:40 AM
Post #2 of 16
(6493 views)
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Re: 2012 jeep grand cherokee
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Went ahead and created a new thread for him.
Can't really figure out what is wrong with it when it is working. They are going to have to hopefully catch it when it is acting up.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Jun 19, 2012, 11:44 AM)
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acat84
Novice
Jun 19, 2012, 11:46 AM
Post #3 of 16
(6477 views)
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Re: 2012 jeep grand cherokee
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Thanks for the thread. It is still under warranty, but they dont seem to be very interested in any in depth diagnosis. I guess being a relatively new model they haven't had this problem enough for any kind of TSB?
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Hammer Time
Ultimate Carjunky
/ Moderator
Jun 19, 2012, 11:47 AM
Post #4 of 16
(6475 views)
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Re: 2012 jeep grand cherokee
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Check to make sure you haven't sucked a bag or something up into the air intake under the dash on the right side. If not, then there is some issue with the mode doors that has to be found.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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acat84
Novice
Jun 19, 2012, 11:51 AM
Post #5 of 16
(6469 views)
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Re: 2012 jeep grand cherokee
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I forgot to mention that I did check the intake and there was nothing plugging it, I also have made sure not to put anything in that area afterwards
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Hammer Time
Ultimate Carjunky
/ Moderator
Jun 19, 2012, 11:56 AM
Post #6 of 16
(6462 views)
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Re: 2012 jeep grand cherokee
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Electronic mode door issue, yet to be determined.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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acat84
Novice
Jun 19, 2012, 12:03 PM
Post #8 of 16
(6443 views)
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Re: 2012 jeep grand cherokee
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No, there was nothing over there. That was my initial thought the first time it happened but i have pulled down the duct to make sure
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Sidom
Veteran
/ Moderator
Jun 19, 2012, 12:32 PM
Post #9 of 16
(6429 views)
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Re: 2012 jeep grand cherokee
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I have agree with Desi that it will probably be an actuator problem. When you say you get no air flow, is that just thru the vents & the air is now coming out the defrost vents or floor vents or this is no air flow whatsoever in the cab?
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acat84
Novice
Jun 19, 2012, 1:39 PM
Post #10 of 16
(6415 views)
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Re: 2012 jeep grand cherokee
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There is no air flow from anywhere, you can change it to defrost, bi-level, head or foot and you can hear the doors change positions with no abnormal noise but there still is no airflow at all. The blower runs normally also, there isn't any hesitation or dragging
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Hammer Time
Ultimate Carjunky
/ Moderator
Jun 19, 2012, 2:00 PM
Post #11 of 16
(6410 views)
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Re: 2012 jeep grand cherokee
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Same answer, door or actuator problem.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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acat84
Novice
Jun 19, 2012, 2:04 PM
Post #12 of 16
(6404 views)
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Re: 2012 jeep grand cherokee
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Thank you guys for your help. I am taking it back to the dealer tomorrow, so I will see what they say this time. Thanks again
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Sidom
Veteran
/ Moderator
Jun 19, 2012, 2:10 PM
Post #13 of 16
(6400 views)
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Re: 2012 jeep grand cherokee
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I agree it sounds like a door problem but since there is no air flow anywhere in the cab you would have to think it was an intake problem.
It seems that if it was a mode door defaulting to the wrong position you would get some air, just coming out of the wrong spot. No air would really seem like the intake is getting blocked some how, restricting the incoming air flow, about the only other scenairo I could think of but seems really unlikely would be if the squirrel cage was somehow spinning on the blower motor shaft & then reengaging at some point.
I can't say for a 12 because I haven't seen the blower motor setup but on all the other ones, it would really be impossible because once the cage became loose on the shaft, it's not going to reengage without repair.....
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Hammer Time
Ultimate Carjunky
/ Moderator
Jun 19, 2012, 2:47 PM
Post #14 of 16
(6390 views)
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Re: 2012 jeep grand cherokee
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I'm assuming the air flow is just dead heading somewhere. He said the symptoms go away shutting the car off.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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anew12
New User
Jul 17, 2012, 6:30 PM
Post #15 of 16
(6168 views)
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Re: 2012 jeep grand cherokee
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I am new to this forum, but my 12 GC has started having the same ac issues. For me, it seems to happen after driving about an hour at the same speed, usually on the interstate. I wondered if anyone had found that this happened after driving at a constant speed for an hour or so, or if you had any ideas why the ac gives out. Thanks.
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Hammer Time
Ultimate Carjunky
/ Moderator
Jul 17, 2012, 6:33 PM
Post #16 of 16
(6166 views)
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Re: 2012 jeep grand cherokee
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If you need help with something you need to start a new thread of your own.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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