Do I have to level my refrigerator and how level does it really need to be?
Yes, you must level your refrigerator. When parked it should be level in all directions +/- 2 degrees, which is approximately a half bubble off. The absorption cooling process relies on heat and gravity to move the coolant around. When moving on the road the motion will help prevent the coolant from pooling in the boiler and overheating. It is this overheating of the coolant that contributes to cooling unit failure.