My clipper fridge is wonderful. Doesn't matter how hot outside or inside, the fridge works great on both 120 and propane. Always cold. Never an issue. Knock on wood. It's 44 years old.
On the other hand, my FnR fridge can't cool down if the inside temp is too high. Propane is actually worse in this case than the 120. However, if I cool down the inside temp with the AC, then the fridge cools down well in both modes (propane cooler than 120) regardless of exterior heat. As I don't camp in hot temps, but live in hot temps, I just have to use the AC when I precool the fridge before a trip. Then it's fine as I head into cooler climes.
I have added the exhaust fan, the interior fan, and reflectix to the outside wall behind the fridge. They help a bit but can't compete with 90+ temps. This fridge is 21 years old and has a side vent rather than top vent.
