My ice maker is not working. The solid white arm came off on one side and I didn't know where it was suppose to go,so I took the whole thing out. I'm thinking the ice maker has something to do with the ice build up I keep getting in the back of the frig. I have to take the bottom (large) vegetable keeper out every few weeks to melt the ice. How do I put the white arm back on. What does it attach too. Is this the cause of the ice build up in the frig? My Use and Care Guide just says it is model 650. No f,0 or anything else.