I installed two 3" computer fans in the upper vent for my Frig when I pack in a CG and that side of the RV sits in the afternoon sun. A switch that I wired to control the fans is placed in the lower Frig vent grill. When needed I just flip it on and it helps immensely..I also installed a 3" computer fan inside the Frig on the top shelf blowing downward,wow what a difference in frig temp-top or on the bottom drawer...but I still need to keep my ice cream on the bottom of the freezer compartment and its rock hard..I feel that when the frig goes bad a standard 120v frig/freezer will go in its place,no more fans then...