GAS REFRIGERATOR TROUBLE

Having trouble w/ frig not cooling on gas. It works fine on elec or batt, but does not seem to cool at all on gas. There is a flame, I ran a camera up the flu and it seems to be clean, the baffle is shiny and clean, the flame is blue and stays lit, I checked for leaks w/ soapy water and found none, the stove burners seems to work as well as they ever did so I'm assuming I do not have a leak, I checked the water column and have about 12", I called dometic tech support and they suggested lowering the baffle 1/4" which I have done. I would like to see a picture of what a flame should look like on an rpod, all I can come up w/ is that I do not have enough flame to create enough heat. I can find a picture of a flame on a large dometic rv frig, but not on a 4.3 cu ft frig like in my 2011 171 rpod. Am looking for a flame pic and any advice on where to go next. I called my dealer and he said they don't repair, they only replace the whole unit for over 1K$. Besides a new dealer any thoughts?