does the system stay on or cycle? How much did you put back into the system? I added the AC option to my car with mostly junk yard parts. When I pulled a vacuum and charged it with whatever was in the book, it didn't work very well. I ended up just putting one of those "top off" cans on a shelf to it and adding more chart until the vent blew cold. If i was to guess I added about 5-6 more oz. Which worked well. No further issues.

I would say try that before replacing any parts. If it doesn't work, you will be sucking the system down anyhow and recharging it. And a $10 can of top off AC refrigerant is better than buying either of those parts.