If yours is like mine, which I just had new fans put in, it works fine when I first turn it on as long as I don't move the coach. I drove a little over 100 miles and it quit keeping the lower part cold. I took the out access panel off out side and placed a fan blowing on it and it cooled it right down. My freezer compartment stayed froze all the time but always after I drive a little with the fridge on gas it warms up in the lower compartment. I took it to the shop and they don't know why it does it either. I would suggest to you try the fan out side blowing in on the back of the fridge.