Dometic Refrigerator Won't cool after coils blocked

Frig is 5 years old. The 5th wheel was always set up in a park and always level.
The insulation could have been covering the coils since day one and the insulation showed signs of heat damage. So a build up crystals is highly likely. The 120 volt element has power and continuity and when on gas I can see a flame. Looks like a new fridge or at least a new cooling unit is in order. They used to say to turn the unit upside for a week, but I'm not sure that was for this type of damage.