Problem with fridge heating up when traveling

I have the same problem with my Dometic. Traced the problem to the installation wherein the fridge is mounted right on the floor of the rv directly above the catalytic converter. I've checked the temperature of the floor adjacent to the fridge and it's 104 degrees Fahrenheit. I've thought long and hard for a solution but have come up empty. Can't raise the fridge because the sink is in the way. Can't insulate the floor because there's no room under the floor of the fridge and the heat shield of the catalytic converter is too close to the floor. Oh well, I'll just have to live with it.