AC not cold at idle???
I saw this on another thread a while back and I've got the answer and it ain't pretty.
My AC puts out fine when you're underway but blows warm sitting still, I figured it might need some freon and checked it out, sure enough the compressor wasn't turning all the time so I went to add freon, however I couldn't find the inlet fitting. So I brought it to my mechanic and he should me it was on the dryer. However he also got under the truck to investigate a suspesiion he had and bingo, the wire leading to my fan clutch was cut entirely threw. This is something that happens often from what he says. The wire is suppose to go under the fan then travel up in front of it to connect to the clutch. However the wire is dagerously close to the fan and often is snagged by the fan and severed. The mechnic tells me that it often damaged the fan blades, but not always. The new fan clutch is usally $400 just for the part.
The cooling system on the engine is powerful enough that the engine usually won't overheat, it's really hot here right now and I noticed my temp gauge goes up a little sitting at a red light but not enough to notice had I not been looking for it.
So if you've got a cummins around my model year get under and look for the wire going up to the clutch. If comes out at the bottom of the engine and travels just to the driver side of the engine under the fan and up. Mine was no longer going up between the fan and radiator but now a severed wire along with the metal tube protecting it is between the fan and the engine.
In my opinion this is a design flaw and Dodge should recall this, however I doubt this is going to happen because it's not a personal safety issue and when you're protected by the government you have privileges to not worry about costumer satisfaction.
Right now I have
2006 2500 MegaCab 5.9L Automatic. AFE Stage 2, 5" Silverline Turboback, Flex-O-Lite, & Edge Programer