Hey all my question is whether or not air/non condensable can enter in your system on the high pressure side. I know it sounds like a "duh" question but I think I'm experiencing it.
We have a weld leaking just off our receiver, and I am wondering if this could be allowing air into the system. If the refrigerant changes state (read:volume) could this be swinging the pressures in the leak area enough to draw in air? Or is it due to some sort of venturi effect? Anybody able to take a stab at it?

Thanks