I've had similar issue in trusting my local RV repair people in the past.
The only way around it is to learn how it works and do it yourself.
Now, with that said, there was 17 hours between your question and surrender.
"" The wife got to you, didn't she?""
I've had those kind of wife problems. Most of us follow directives well or at least know the kind we have to follow.
2 more cents worth, I had a somewhat similar issue, but without the burner flame back part of it. Wrong color flame, not cooling well.
I found the following issue - dirt dauber nest in the burn.
By the way, I couldn't see the dauber nest until I disassembled the everything.
I may be wrong but I don't think my local RV places would have found it. From what I hear, they usually say "the cooling unit's bad - you'll have to replace the fridge".
You said it's under warranty so maybe your dealer will prove they are competent with refrigerators.
Joe and Evelyn