HVAC not blowing air - Dodge Challenger Forum: Challenger & SRT8 Forums
 
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post #1 of 9 (permalink) Old 07-08-2019, 08:52 PM Thread Starter
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Thumbs down HVAC not blowing air

Drove the car 8 hours today, had to travel for work, and about halfway through the trip, I noticed that my A/C wasn't working. I could hear the fan blowing, but nothing was coming out of any vents. I tried switching over to manual, but repeated setting changes failed to restore function. Even setting the system to recirculating internal air didn't do anything, so it's not that the intake is blocked. Something inside the plenum isn't opening to allow airflow. Eventually, after shutting the car off a few times, something shifted enough to allow at least some air, but even with the fan on Max I'm only getting a gentle breeze through the dash vents and it comes out of some vents more strongly than others.



Has anyone else seen this? Does anyone know what door is the likely culprit, and is it something I might be able to reach and free up? I'm on the road until Friday, so I can't drop it by a dealer for a warranty repair that might take days to diagnose and get parts for.
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post #2 of 9 (permalink) Old 07-08-2019, 09:16 PM
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Could be a bad actuator. Not sure if there is the HVAC module has a self diagnostic test that can be without a dealer scan tool.
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post #3 of 9 (permalink) Old 07-08-2019, 09:23 PM Thread Starter
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Originally Posted by ChallyTatum View Post
Could be a bad actuator. Not sure if there is the HVAC module has a self diagnostic test that can be without a dealer scan tool.

Thanks for that. The doc you included says any problems will store a code, and IIRC there is a way to see diag codes in the dash display, so I'll look tomorrow to see if the system recorded any issues.
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post #4 of 9 (permalink) Old 07-08-2019, 09:36 PM
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Thanks for that. The doc you included says any problems will store a code, and IIRC there is a way to see diag codes in the dash display, so I'll look tomorrow to see if the system recorded any issues.
Not sure if a generic scan tool can pull the code as it is stored in the BCM but worth a try. On my old JGC you could access the codes through the HVAC module but I don't think it can be done on the +2015 challenger models, although I never really looked into it. There are tests you can do by pulling connectors and testing voltages but it's pretty lengthy. Check out the online chiltons manual through the link below. I think it is the same as in the sticky in the maintenance section.

https://www.roswell-nm.gov/1112/Chil...Repair-Library
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post #5 of 9 (permalink) Old 07-09-2019, 01:32 AM
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I think it is the same as in the sticky in the maintenance section.

https://www.roswell-nm.gov/1112/Chil...Repair-Library
No longer working, best to link to the sticky as it lists the new address

https://www.challengertalk.com/forum...access-666787/

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post #6 of 9 (permalink) Old 07-09-2019, 07:39 AM
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Does your car have a cabin air filter? I've seen dirty filters greatly reduce air flow on other vehicles.

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post #7 of 9 (permalink) Old 07-09-2019, 07:53 AM
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Pretty sure he does as he has a 2015 SRT.
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post #8 of 9 (permalink) Old 07-09-2019, 11:02 AM Thread Starter
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Originally Posted by 72/340 View Post
Does your car have a cabin air filter? I've seen dirty filters greatly reduce air flow on other vehicles.
That was the first thing I thought of. I checked it two ways: first, I tried to switch over to cabin recirculation, which shouldn't be trying to pull air in from outside, and then I physically checked the filter, which looked fine.


As it happened, this morning, everything seemed to be working fine, and when I went into the dashboard system and had it check diagnostic codes, there were no codes showing. I should have thought to check yesterday when the problem was occurring to see if it was a transient code that cleared itself later. I'll have to keep an eye on it and make a point of checking the diag codes immediately if it happens again.
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post #9 of 9 (permalink) Old 07-09-2019, 01:51 PM
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Not sure if this is any use to you, but i had the same thing happen with my 2013 Caravan. I haven't gotten it fixed yet, but i have found a work around.

When it happens while driving, turn off the AC, turn the temp controls to mid position, and turn the fan speed to mid. After about 10 minutes, operation should return to normal. At least it does in my situation.
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