Sadly, 3 months after purchasing a well kept 2013 15B, the refrigerator released all of its ammonia requiring a replacement. Same Dometic model was $2000 taxes in. Direct replacement and easy to do if you are mechanically inclined. New 'fridge works like a charm.
Interesting that the new 'fridge didn't have a door panel. Thankfully when I pulled out the old unit, I recovered the wooden door panel from it. Slid into the new units frame with a little bit of jiggling. Looks like the original.