Being new you shouldn't have to do anything to make it work.
It doesn't have to be cool in rv for fridge to work right. I added two 4" 120 volt fans from walmart installed them at the rear of fridge and made sure the top vent was vented properly. Mine had a big openning at the top and the air just stayed there and wouldn't go out vent in slide out. But i think yours should probley just go right put the top of the roof. I got the air flowing through the back and my cooling fans hardley come on during the day.
Outside temps were 100 deg and fridge is 34, freezer is -10 setting is 6 and inside camper is 85-100 deg when im not there. The fans made a wonderfull improvement on mine.
