I just went through this, but I also had a compressor clutch failure. Your blend door could be sticking. There are so many posts on this site where people claim the AC blows cold on one side and hot on the other or changes from cold to really hot and cold again. Just about everything on these cars is run off of vacuum and that includes the blend door. Vacuum is typically pulled off the intake manifold just like in your old carbureted Chevy PCV or Power Brakes. Remove the battery and the battery support that holds the battery. You will find a grey tube similar to what is used in windshield washer systems. This tube will be exiting from the firewall and runs under the battery. Follow this grey tube from the firewall checking for damage that could cause a leak. When you reach the back of the intake, the tube slips into a thin rubber hose that connects to the back of the manifold. This rubber hose deteriorates resulting in a loss of vacuum. I have fixed three other Crossfires just by replacing this hose. If that isn't it, remove the glove box and panel under the passenger dash. Once you get the panel out of the way, you will see a small connector with 2-3 green hoses connecting to it. Two of the hoses will run up to the "Blend Door Actuator". If the actuator is bad, you would have heard a "clicking" noise under the dash when adjusting from cool to hot and vice-versa. If you did not hear clicking, then most likely the cause is the connector I spoke of earlier with the two green tubes exiting from it. You can buy the connector and the actuator on eBay for $40. Let us know if this helps.