One thing that happens to the propane side of the fridge that causes them not work, is the easiest fix in the world. Check the propane burner on the back of the fridge. It may be completely covered up with rust dust from the chimney. Just use a little low pressure compressed air and blow it out. Usually they will fire right up and work fine. I have had to do this at least once a year to every fridge I ever owned.It is cheap, easy (as always go the easy route first). If a dealer does this for you, it will cost you $50+. There is a small access door on the burner just for this reason.PLEASE DO NOT DISCONNECT ANY GAS LINES. You do not need to.