A.C. problem on 2002 Dodge Ram 1500

I have a problem with my a.c. AT first it was blowing cold air thru all vents,then it stopped blowing on the passenger side,now it doesn't blow cold at all.Is this a compressor problem or something else.

2 answers
YOU PROBALLY HAVE A BLEND DOOR PROBLEM. THERE ARE TWO DOORS THAT MIX THE AIR ONE ON TOP AND ONE ON BOTTOM AND ONE IS BROKEN. YOU HAVE TO PULL THE DASH BACK TO FIX IT. I WOULD REPLACE ALL THE DOORS.
A/C systems are very complex and take special training and equipment to properly diagnose and repair. You should take it to a repair shop and have them look at it. Probably not the answer you're looking for, but without a basic understanding of A/C systems, you can do more harm then good.