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Heating & Cooling 4th Gen Dodge Ram Heating & Cooling Problems and Questions.


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  #1  
Old 09-27-2014, 01:51 AM
maj34 maj34 is offline
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Default Yet another low airflow HVAC issue

Hi all:

Proud new owner of a Ram 1500 here; currently in the middle of a cross country road trip and started experiencing some HVAC issues. Specifically, I've been experiencing low airflow through the vents - but only after engine has been running for a while. (Just me, or is this bizzare?)

Today was 32C/90F so I needed AC; this afternoon, I gradually got warmer and then realized I was getting very little air from the vents. Naturally, I tried turning up the fan speed and everything *sounded* right, but only a small increase in air flow. I had it on 4, but it was blowing out the vent like a 1 or less.

The strange thing is: I stopped for gas, and when I re-started the truck, the airflow was back in all it's glory. But within an hour - same thing - low airflow.

I spent a while reading about issues in 02-08 Rams, but can find very little about 2010 issues, certainly nothing about airflow that gradually decreases after 30 mins.

I stopped for the night and went out to troubleshoot and here's what happened:
- When I start the truck from cold, the airflow is great.
- I try air conditioning and heat modes - both work great. Also, when I took the glovebox off I can see the servo motor turning.
- I can see the recirc "damper" drop down and properly cover off the blower inlet. Not sure what to call this "thing" but I'm going with "damper". Either way, it seems to move correctly and I hear the change in air flow from the dash as would be expected in recirc mode.
- I did notice the recirc "damper" could seal a bit better when down; when I hold down on it, I get a much better seal. You can hear the difference - quieter.
- I can select between floor, dash, and defrost (window) settings and they all seem to work great.

In other words, everything seems to work perfectly. I didn't run the truck long enough to see if the low-flow would happen again, but will update this tread tomorrow.

Can anyone help? I'd hate to have those labor-extensive issues that they had in 3rd Gen Rams, but it's also very frustrating that I can't find anyone with the issue I'm experiencing.

Thanks very much in advance.
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  #2  
Old 09-27-2014, 09:22 AM
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SShadow1974 SShadow1974 is offline
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Intermittently, when I start my truck I have to switch where the air is being directed in order to get full air flow. I've had the truck at the dealer, they couldn't reproduce it on their own of course, but when I picked up my truck I was able to show them. They're supposed to have contacted head office about it and will get back in touch with me... That was a couple months ago now.
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Old 09-27-2014, 09:44 AM
maj34 maj34 is offline
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Weird. I'd say for me it seems the opposite might be true. Playing with the settings seems to make the air flow go away. Today I'm going to set it before starting the truck and not touch it again.
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Old 10-12-2014, 12:57 PM
gt350 gt350 is offline
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I have a 2010 Dodge Ram 1500 4x4 and since I brought I new I have (Dodge replaced 3) and I have replaced 3 also blower motors. I have replace the blower resistor also but now it is going out again after a month. It starts by varying speeds and slowing down and then finally stops. I can bump it with my fist to restart it, but there has to be something causing all these failures. (mileage is 75k)
Anyone have an Idea?
Thanks in advance for any help
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Old 04-23-2015, 09:58 PM
mitch 2728 mitch 2728 is offline
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I've had the same problem on a trip to Georgia
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Old 05-12-2015, 03:11 PM
mdastrup76 mdastrup76 is offline
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I am experiencing the same low flow A/C problem with my 2012 RAM 2500 6.7L Diesel. I've owned the truck since February. Temperatures are beginning to rise in my area. By July, driving the truck will be uncomfortable at best. Any informative answer to this thread would be greatly appreciated.
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