Dead Refrigerator

The refer and MH is only 2 years old, seems strange to me. When you say the refer is dead do you mean not lighting on propane and not working on electric? Maybe the techs did all this already, but I would hook the electric element directly to 120v and see if it cools. If so, you refer is still good and your board or the circuitry to the board is bad. Is your board a potted board, (electrical components incase in plastic) or a open board where you can see all the components soldered to the main board? If the latter I would call a company called Parts for Tech, they service and rebuild boards. They have helped me several times with boards that have gone bad and were obsolete. My MH is 27 years old and when the board went on my steps, repairs shops wanted $1200 to replace the whole step unit because Kwikee no longer sold just the board. They told me over the phone what to check for and I replaced a burnt-out resister for $3 with their help and all was good again. Most shops and RV techs are in the business of just replacing bad control boards not repairing them.