My daughter's 2007 A3 air conditioner hasn't worked well since she bought it. I'm expecting it to be the pressure switch(G65) or the solenoid valve (N280). It appears that the G65 is probably more common than the valve, but don't want to shotgun the problem. I did come across a video and the guy made a comment that the valve can be R&R'd without having to evacuate and recharge the system? Is that correct?

However, the solenoid valve will discharge the system?
Thanks,