Fridge On Propane - Again.

I swapped it out myself.   It fits through the door easily (with a helper), with fridge door out so can continue into the opening without turning it (backed the fridge into the camper to the opening).  I added insulation to the side and top walls of the opening. 

Another update:  The 120vac stopped working for the fridge and the burner assembly started rusting making it difficult to keep clean.  That meant a $400 control board and $100+ for the burner assembly.  So I decided to chuck it and get a new RM8505.   This is same size as the default RM8501 but has the auto change over from 120vac to Propane (and back).  The burner assembly is different, hopefully better.  Expensive replacement but I'm happy with it so far.

Update: I was still having issues, each time a cleaning would fix it for awhile. I finally decided the two probes (starter and temp flame detector?) were too far into the flame. I backed then out just enough and it has been working even better since! The temp probe was halfway into the flame. Research suggests only the metal tip needs to be in flame. Everyone’s happy now. :-)

It's Fixed!  I tried the brake cleaner spray treatment (Thank You JandL) on the mantel.  I attacked the mantel/burner with the spray, blew it out with compressed air (can, don't have compressor), then sprayed again.  Then filled a small bowl with the brake cleaner and soaked overnight.  A final blow in the am, let it all dry and hooked it back up.

There is a inline filter in the gas tube and when I contacted Dometic about replacing it they said it was not removable. One I replaced my propane pressure regulator with a 2 stage everything worked as it should, so I didn't look at replacing the filter. The filter can be ordered. I looked at your picture and my flame and it has a lot more blue going up the flue. I don't think your flame getting hot enough.