Quote Originally Posted by fsteyer
Hi-
I just replaced my leaking condenser. I charged the system and the a/c workes but I have to wonder:
1. there has to be air in the circuit
2. so how does one proberly refill/charge an a/c system from scratch?
Thanks
I would stop using your AC till it is fixed correctly.
Air and moisture in the system will turn into real nasty acids when mixed with refrigerants. Or moisture can freeze up componets.

I worked with one guy who was a real stickler when evacuating the AC system, after all leaks were verified and fixed he purged and pressure tested system with Nitrogen.
He would heat the AC system componets up around 110 Deg. F , To help draw out more moisture, solvents from the system, when pulling Vac.
When system is being evacuated ,the vacuum causes any moisture to boil and turn to vapor and get sucked out of system.
Then would purge the system with R12 vapor(or what ever was needed) a couple times, and do a final deeep evacuation for 30-40 Min.
Probably over kill, but done to the **** !!