Just bought my 2nd MM, repairing the ac, (hvac tech by trade)
Just finished replacing the head gasket, is worth converting the system to 134a?
I have some r12. I just want to do whatever is easier. It was low and I added gas just to
make sure the compressor ran, it does run but I was running 5/150 So I ordered a expansion valve
drier and gonna flush everything. Is it worth sticking with r12 or switch to 134a. Open to any advice!