Low side AC Service Port Leaking?
I just added a can of 134A to my system today. After I took off the quick connector from the charging kit, the low side port started slowly hissing. Refrigerant gas was leaking from this port. Could this be my leak to the system? I quickly grabbed the cap to tighten back on the low side port. Not even sure if this cap was designed to handle the small amount of pressure or if its just a dust cap. Any one had a similar experience or know if this is a genuine leak?