I have changed over my compressor,drained and or changed all parts. I know I need the retro kit to fill with R134 and I have that. The valves in the kit fit both ports on the back of the comp. how do I know which one to fill?
I realize that the can will only fit one port, but seeing as the port will screw on both valves which one do I screw it on.
I hope this makes sense. Pics would be better but I am not at home.