Mine was the same, turns out it was a leak in one of the metal pipes from the condensor. I tried the sealer, and it blocked the expansion valve, so I ended up replacing the pipe, and the condensor, since the pressure built up and blew a hole in it.
I would be extremely cautious with the sealer, I've never had success with it.
if you find an independant shop they'll find the leak for you, and I'm sure it will be cheaper than Chrysler.
My repair ended up at about $1400, the pipe is expensive, used an aftermarket condensor, and even the oil in the system is not 'normal' and guess what .......expensive