The Norcold fridge in our TT has issues with it temp going all over the place. When it's warm out, it's warmer inside and not because it doesn't have the cooling power. It's only because the thermostat shuts it off at different temps.
So if it's 80 outside , it cools to 40ish and shuts off. When the temp drops to the 60's, the thrermostat decides 32 is good. I know the stat has no idea what the outside temp is so this is baffling to me. Our old American had no such characteristic.
Then we finaly took a trip where the fridge was full but not stuffed. It did great! Temps were very constant.