Josh,
I have an 04 dynasty, bought it 6 months ago. Upon purchase the dash ac was adequate at best but not impressive but 2 months after purchase it quit blowing any cold air, had to open the window and thought i heard my engine compressor cycling, the gauge confirmed this so I pulled over to hunt for the air leak. Found a small hose, probably .25" od had pulled out of the round black sphere in the generator compartment. This is a vacuum hose that i assume engages the ac compressor. I cut the cruddy end off and reinstalled the hose and now the dash ac blows nice and cold. Don't think I would have found it if the hose hadn't pulled all the way off, dumb luck i guess.