Originally Posted by vinmaker
That is good to know. Front to back is most important. That is good as that is the easiest to do.
The most important is getting the fridge level side to side (of the fridge).
For most trailers this will be the front to back of the trailer because the fridge is mounted sideways to the trailer. If the fridge is mounted otherwise, like in the rear or on a 45 then that'll change. But as long as you can stand in front of the fridge and it's level side to side of the fridge then you're ok.
That's not to say you can completely ignore the other direction. I wouldn't want to try using a fridge that's level side to side, but pitched 30 degrees front to back (again, of the fridge).