HVAC issues - JeepForum.com

 
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post #1 of 9 Old 12-05-2011, 08:16 AM Thread Starter
HOOGIE43MI
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HVAC issues

I've got a 05 GC Limited 5.7 with dual climate control and I'm having issues with my HVAC system. I have no control as to which vents blow and no control of the temp. I first thought it was a blend door issue, but when I disconnected the the control panel and reconnected it, I was able to control which vents were blowing. If I mess around with the selector knob and cycle it through, it goes right back to defrost/floor and I can't change it. I could also control the passenger side climate before I cycled through the vent selections. The fan blower is not affected. I can control that just fine. I'm thinking that I need to take it in and get the system re-calibrated, but not sure. Please help!!

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post #2 of 9 Old 12-05-2011, 01:11 PM
sm58
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I'm having the same exact problem. Tomorrow I have an appointment with the Jeep dealer to have a system reprogrammed. It seems that there is an update ( NUMBER 24-002-06 DATED MARCH 04 2006) that should solve the problem. Will update final outcome.
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post #3 of 9 Old 12-05-2011, 02:59 PM Thread Starter
HOOGIE43MI
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sm58,
I hope the reprogram works. I guess I'll stop stressing about it for now. I look forward to your results.
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post #4 of 9 Old 12-05-2011, 06:34 PM
Tarpon65
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Hoogie, hopefully it's nothing too serious. We left our house on Thanksgiving Eve around 3 AM to drive 14 hours to Tennessee to see my dad in our '05 Jeep Grand Cherokee Limited and within 5 minutes we had no climate control and a loud clanking sound coming from under the dashboard. We fought with the sound and the windows fogging over for 100 miles but eventually gave up and came back home. Ended up being a 65 dollar actuator and close to 700 dollars to replace it. Our Jeep has been in the shop 5 times since we bought it new, and every time it has been a major issue with the AC. I love the Jeep, but it seems the AC is poorly designed/built.
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post #5 of 9 Old 12-05-2011, 07:02 PM Thread Starter
HOOGIE43MI
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Tarpon, I originally thought it was an actuator or blend door issue. I ruled both out when I pulled and reinstalled the electrical connector going to the control panel and everything worked perfect for about two minutes. Im really hoping it just needs software update and recalibration. It blows my mind when I hear how much it costs to repair/replace some of those components.
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post #6 of 9 Old 12-06-2011, 04:39 AM
sm58
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Just got back from Jeep Dealer and they said that the software was up to date.
I quess I'm just gonna have to live with either cold or very hot air blowing inside the car......
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post #7 of 9 Old 12-06-2011, 06:12 AM Thread Starter
HOOGIE43MI
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Sm, did they perform the recalibration, or did they just check the software version?
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post #8 of 9 Old 12-06-2011, 12:05 PM
sm58
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No, just a software update check. They mentioned nothing about a recalibration..
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post #9 of 9 Old 12-06-2011, 05:12 PM Thread Starter
HOOGIE43MI
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From what I understand, the door and temperature sensors require the scan tool to recalibrate. It resets all the sensors that control the system to ensure they are all in sync.
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