The drier was changed, not sure about the o-rings, I would guess not. When talking to the previous owner and his trouble with the leak, which was fixed by the shop I took it to it seems he added quite a bit of oil. I am not sure why but he did. I have a theory now that there is simply too much oil, old and new in the system, so the shop I took it to said they would take the entire system apart and blow out all the oil out and replace all the o-rings as well. As for freezing up, that was my first thought, but the airflow doesn't drop off just the temp raises. Thanks for all the help, I will let you know after the shop looks at it if it works.