My camper van had one of those. Model 323. Was maybe 30 y.o. when it finally failed and I replaced with a 12v unit.
No fancy control board to fail. Temp controlled by setting the pilot light to low or high. On low mine ran 10 weeks on a 5g tank of propane, which also included cooking 3 squares a day. On high, 5 weeks, but I only set it to high during the hottest part of summer or else it would freeze stuff.
Mine was subjected to many many off-camber situations and never had any issues. Only failures were a door gasket that got a little loose (glue fixed it) and a failed $5 thermocouple for the pilot light.
Draws 11a running on 12v so I never did that except for annual inspection.
If I didn't already have 2 12v fridges the same size, I'd take it in a heartbeat and gladly pay shipping.