This fridge is two years old and not cooling, thankfully the customer had it emptied before I got there, rolled out with the back already off.  It was drawing 1.22 amps and warm to the touch but not hot, the compressor seems fine, no frost build up and no audible hiss. Pierce the system and the needle doesn’t move, plug the power back in and it reads five pounds. Hook up the recovery bag and open the valve, the needle went back to zero and not even a hiss. So drag out the Nitrogen bottle, unplug the fridge, run it up to 200 psi and listen in the freezer, nothing yet. Grab the soap bottle while heading for the back and immediately hear the hiss I’m expecting. Reaching to feel the connections to the compressor I feel a draft blowing down on my wrist. The heat exchanger, hot gas feed and return are all within a few inches of each other and the escaping gas is coming from the ‘foamed in place’ back panel somewhere above them. Unfortunately nothing I can do to fix it.

This customer is lucky, in spite of being a year past the warrenty period the manufacturer is supplying them with a new fridge.