I have a 2005 RAM 2500 Cummins, the airconditioner blows hot air on passengers side while drivers side is nice and cold. Both sides have cold air if I select it to defrost? I have serviced the aircon no help have cycled all switches mutliple times?

Would really appriate any help.

 

I too have this issue, after you get going for a while, it gets cold on both sides though, at startup it is very bad. I ahve had mine serviced by the dealer, as well as having to do some ifxes myself. Still not sure though.

 

Are all the blower controls not functioning properly? blows out to the feet when defrost is selected, stuff like that? Just happened to mine and I had it at the dealership so I asked them to look at that. after the $100 diagnoses they said a new AC head unit should fix the problem for $230 installed. Searched around a little and found a used one from a wrecked truck on ebay for $35 or best offer. Got it for $25, comes with a 6 month warranty and took no more than 10 minutes to install, VERY EASY! fixed the problem and saved $200. Can't be sure if your having the same problem as me but that's how I fixed it. hope it helps.