I talked to an old RV dealership and talked to a gentleman who was 85 yrs old and still working there. I have a Krefft fridge but the one thing he told me is the fridge should be level before starting it. He said something about the ammonia migration . He said he had some fail if they were not run level.
When the gas is on does your burner have a good flame? The gurgling sound I have had in my 52 GE Fridge which I think is normal.