A few years ago I recorded the temperatures inside and outside the fridge just to see how well it works. Data shown below. Unfortunately I did not record what I meant by “back fan on”. Was it the fan on the cooling fins on back of fridge? I think so. But was it cycling and what was the cycle period? It might have been the fan I added to the external water supply port on van, but I doubt it. Nothing worse than half assed experiments eh?
Oh, almost forgot to add, this is with fridge on propane power.