mckellyb wrote:
Interesting.
Deen, you were on-track, but I've seen this topic go haywire in the past.
Plus, both inside and outside fans can help, greatly.
I've found our inside fan keeps the fridge below 42F, as long as it's below 115F, outside. Vegas...lack of shade...and it was in the sun, so real air temp, inside the wall, was likely 125+.
Any higher, and it's time to get moving. Actually, when this was happening, I was in the process of replacing the A/C belt on the engine, or we'd have already been gone.
Right this minute, it's 100F here in Dallas, and the Dometic RM1282's fridge side shows 35.2F while on a setting of '3'. I'm happy.
The interior fan helps a shocking amount, we've found, and while I initially had it hot-glued to the fins, the glue didn't hold in the cold, and it's sat up there for 60K+ miles, which includes Alaska's gravel, Yukon's pavement, a dirt/gravel Idaho NFS road, and going as far east as PEI. It won't shake off, apparently.
If you want to just try the internal fan, there is 12V at the interior light. I wound up merely wiring it to said lamp, the draw is tiny, so if the fridge is on, the fan is spinning.