You may want to try
www.gasrefrigeration.net or do some Google searches on RV + Refrigerator + Dometic...
Our 1988 Excella had a refitted Dometic RM 2607 two door unit, with a bad control board that manifested itself into shutting unit down after 12 to 24 hours whether on A/C or gas power..
Dealers and RV Outlets (like Camping World) begin and end discussions with: They can't be repaired, just replace the unit, and we'll do it for $X,XXX.XX which is almost always over $1,000...
We solved our problem quite neatly with new (Dinosaur??) Control board at $110 from shop in Seattle area, and new boards work better and last longer than Dometics, which fail due to heat buildup in "potted" circuits... If tubes of coolant rusted and leaking, that's more serious, and may argue for box replacement, but even still there are several rebuilders who'll ship you new "Cooling Units" for installation into your system, if you're willing to remove unit and do some serious "wrenching.."
John McG