A/C Troubleshooting - Dodge Diesel - Diesel Truck Resource Forums

3rd Generation Ram - Non Drivetrain - All Years Talk about the 2003 and up Dodge Ram here. PLEASE, NO ENGINE OR DRIVETRAIN DISCUSSION!.

A/C Troubleshooting

Reply

 
 
 
Old 02-01-2018, 11:17 PM
  #1  
Registered User
Thread Starter
 
Join Date: Oct 2017
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
A/C Troubleshooting

Hey guys, I recently bought a 2007 Dodge Ram 3500 4x4 SRW Quad cab with the 6.7L Cummins and it turns out the A/C is not working. I thought maybe it just needed a recharge so I bought a can of refrigerant, but when I checked the pressure, it read high, with the needle pegged to the far right. Thinking that maybe someone had tried to recharge it in the past and over pressurized it, I released pressure from the low side valve until the gage read in the normal zone, but still no cold air.
I noticed that the compressor makes a rattling sound every so often, as if it is trying to engage, but it does not seem to actually be engaging. At this point I'm thinking something is broken in the compressor and I should probably just replace the whole thing. Am I on the right path here?
Thanks for your help!
Ando427 is offline  
Reply With Quote
Old 02-03-2018, 01:26 PM
  #2  
Registered User
 
shep1's Avatar
 
Join Date: Mar 2004
Location: Denver
Posts: 358
Thanks: 0
Thanked 0 Times in 0 Posts
I thought the same thing about mine. did some "RESEARCH" on here and discovered the recirc door, located behind the blower motor, had broken and fallen down blocking air flow across cooling coil. I remove the glove box, remove the blower motor and reached in and checked to see if this was the problem. It was. I removed the broken recirc door and reassembled all. Cooling worked as good as ever. I just can't change from outside air flow to recirc air flow. It has been working fine this way, haven't had any problems. Always remember to lower or turn off fan before changing any air flow settings, then bring fan speed up slowly. One step at a time. It seems that higher air flow tends to push the flap doors to hard breaking the plastic drive couplings that turn them. Hope this helps. Not sure about compressor issue.
shep1 is offline  
Reply With Quote
Old 02-04-2018, 09:07 PM
  #3  
Registered User
Thread Starter
 
Join Date: Oct 2017
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Thanks for the response Shep1. I did some reading on the recirc door issue, and it looks like that causes low air flow, even when fan speed is set to high. I'm able to get air blowing out of my vents at all different speeds, so I don't think this is the problem.
I also looked into the blend door problem. From what I can tell reading on here, the blend door blends different temperature air so you can adjust between hot and cold. I'm also able to do this without a problem. I can turn it to full hot and get very hot air, or turn it colder and get air that will get as cold as the ambient outside temperature. My problem is that even after pushing the AC button, I do not get colder than ambient (or refrigerated) air.
So I guess at this point I'm still thinking that the issue resides with the compressor.
Ando427 is offline  
Reply With Quote
Old 02-05-2018, 06:00 AM
  #4  
It's my pot and I'll stir it if I want to. If you're not careful, I'll stir your's as well!
 
Mexstan's Avatar
 
Join Date: Dec 2002
Location: Central Mexico.
Posts: 2,956
Thanks: 0
Thanked 50 Times in 37 Posts
This may appear to be a bit of a stupid question, but is the compressor clutch actually engaging? Have you looked to see that the compressor itself is turning?
Mexstan is offline  
Reply With Quote
 
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
shemp47
3rd Gen Engine and Drivetrain -> 2003-2007
75
01-13-2005 01:21 PM
sdgunslinger
12 Valve Engine and Drivetrain
3
11-02-2004 11:32 AM
Gman77
Performance and Accessories 2nd gen only
16
07-01-2004 01:14 AM
BPD239
HELP!
3
11-08-2003 02:54 PM
Craig93
1st Gen. Ram - All Topics
13
04-03-2003 09:45 PM


Thread Tools
Search this Thread
Quick Reply: A/C Troubleshooting


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.