[Vwdiesel] a/c evacuation

[Shalyn Shourds]

I swapped out the a/c compressor this evening.  I'd previously had the refrigerant evacuated at a nearby VW shop.  Tonight, I found out there's another kind of a/c evacuation wherein the mechanic pulls the discharge line off the compressor and, no matter how little working room there is under an A4 Jetta, instantly evacuates to escape the green, oily, 134A blowing out of the line.  

I don't know how the a/c recycling unit works, whether it draws from just one side of the system or both, but I'm thinking there was a blockage in the system.  Hopefully, it's either an internal failure of the compressor or something in the expansion valve or receiver/drier because those are the parts I'm replacing.  

Sorry, I'm clearly in the learning stages of a/c repair.  Something I'd hoped to never get good at.....

Thoughts?

-Shalyn