I believe norcold is just trying to sell new refrigerators .... things must be slow for them , with the economy turn down. My second recall lasted one weekend .... I called norcold and was told to go back and have it check and I would probably need a new unit (refrigerator) .... so I will disconect the wires from the box and run it without the mod
Unfortunatly Norcold started making their cooling units with a cheaper grade of tubing several years back either to save a buck or to get you to replace your refrigerator sooner. These poor quality cooling units started failing early and have led to refrigerator fires, so rather than recall the whole cooling unit Norcold has chose to install these crumby recall fixit boxes that are just a bandaid fix.
If you want a sure fire fix, you can do what I did and install an Amish Built cooling unit. They are made using a 50% thicker wall tubing and don't need any recall boxes. I am now once again a happy camper since I made the change. Here is a video showing my cooling unit replacement.