02 Durango A/C working but no cold air from dash - Dodge Durango Forum and Dodge Dakota Forums
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post #1 of Old 06-18-2009, 03:21 AM Thread Starter
awolb69
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02 Durango A/C working but no cold air from dash

I have a 2002 Durango SLT 4x4 with the 4.7L V8. The truck has 96,000 mi on it and the A/C has always worked just fine until 2 days ago. When I turn on the A/C the compressor runs properly, the discharge line out of the compressor is getting icy cold, I get chilled air coming out of the rear A/C ducts in the headliner, but I get warm (non A/C) air coming from the dash vents. The HVAC selector on the dash is working properly (goes from defrost, panel vents, floor when put in the appropriate position), fan is blowing on all speeds, just no cold air from dash. Again the rear A/C is still blowing cold. Could there be something wrong with the temp selector on the dash? Its one of those that have 2 knobs for driver & pass temp.
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post #2 of Old 07-12-2009, 04:06 PM
ryans
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A/C problems

I am having the exact same thing going on with mine it is an 03 with 150,000 kms on it. I can't find anyone to give me an answer on what it wrong with it.
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post #3 of Old 07-13-2009, 03:09 PM
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Others can correct me if I am wrong, but here's my guess (since mine was a 2000). I would suspect a blend door problem (dual zone systems have 2 blend doors). But, this is where I am not sure, the 01's went to a servo motor for the blend door, as opposed to a cable on the 00's. I would bet the 02's are the same as the 01's. Please see attached a page from an 01 FSM. Note the part where it says that the servo motor knows the stops of the blend door and will throw a code if not detected. It also says that there is a calibration procedure to learn the stops. That may be your issue, the blend door is not completely closing or the pivot tab is broken, giving you nice warm air in the summertime. Not sure if this is your issue, but a guess since you have cold air in the rear .
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File Type: doc BLEND DOOR ACTUATOR.doc (29.0 KB, 385 views)
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post #4 of Old 07-14-2009, 02:02 AM
l1tech
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This sytem, while simple, is just a bit to complicated for the average person to work on or diagnose, a DRB III is needed to properly do it. Being that the ac in the rear is cool but neither the left or right side is blowing cold in the front leads me to believe that there is a control problem...obviously. This is of course assuming that the system is properly charged.
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post #5 of Old 07-17-2009, 08:09 PM
ryans
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My 03 will blow hot air from the front when I slide the controls to hot but it only blows outside air (non A/C) when the slides are in the cold position. Wondering if if may be the expansion valve on the firewall.
Thanks
Ryan
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post #6 of Old 07-23-2009, 03:15 AM
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expansion valve. I just replaced mine. I was getting ice cold air in back and warm air in front. line to the back was cold and the line to the expansion valve was cold but the valve wasn't. Got it replaved and now all the lines including the valve gets cold.



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