For what its worth..... I have a front kitchen and fridge and mine runs while towing just suffers from a drastic warmup (gets over 50° in a couple hours) even at the coldest settings. It is weird. If we stop for a half hour or so for lunch, the thing will immediately start to lower the temp. So if we are traveling over a hundred miles, we take the food out of the fridge that could spoil and transport in a cooler..... kinda a PITA but not a trip wrecker.
2015 Flagstaff Super V 26VFKSS Emerald
2013 RAM 2500 CC 4X4 6.7 CTD
Sold... 2013 Shadow Cruiser 260BH