I have a 2003 Dodge Cummins Turbo Diesel 2500....I have owned the truck since Sept 2003 and about a year later I started having problems with the A/C. It doesn't cool, feels like its blowing air that is about 70-75 degrees F., (which doesn't help if it's 90+ outside). It also blows the air out of the front vents at different pressure, the driver side two vents are normal, strong force on high, but the passenger side three vents blow like it's on low to medium setting when it is actually set on high. I have taken the truck into dodge (where I purchased it) at least twice a year since 2004 and they keep telling me the air pressure difference is normal on diesel's and that I just need refrigerant added. It works properly for about a month after it's serviced but then re-occurs; the fan/blower pressure has never worked satisfactorily......The blower on the passenger side doesn’t work right whether it’s on straights fan or re-circ….it blows stronger but not in relation to the driver side.....HELP!!!!

 

If it keeps leaking why aren't they putting in leak stop to swell the seals, you can even buy it and put in yourself.

Sounds you may have a vent door problem on the rest, I know some have had that problem, so someone will chime in on that soon.