Yeah, the fridge has to be level most of the time when you use them, otherwise, they'll heat up too much and poof. And, the gas absorption refrigerator coils in the back, with moisture from humidity, and usage, will eventually corrode the pipes, leaking ammonia and other gases. Dometic had a recall on many RV refrigerators, and installed a shut-off device (a circuit board and thermo-probe) if the coils get too hot. Unfortunately, that same moisture will and can ruin the circuit board they install! I have that problem in our RV.