Anonther Atwood Fridge Failure

I know you are talking about a 2015 refrigerator, but if you have a flame it should be cooling. It isn't any electrical problem. You may have developed a leak in the refrigeration system. Yes even on a new unit. That's what the warranty is for. One tell-tale sign of loosing the coolant is a gurgling sound unless all the coolant is gone. But these units don't require any electrical components other than the electric heater element to produce cooling. And you have stated both the electric and gas are working and not getting it cooled.

Look at your Atwood warranty to see how long it covers and go to an RV dealer. I had a bad refrigeration unit on mine that I had to diagnose for the dealer before getting it replaced.