Ice maker quits working every couple of mos. We've tried several diff things each time and it usually starts working again after awhile, but nothing we do seems to help now. The switch is on and there's no ice obstructing anything. Ice bucket is clean and empty but no ice is being produced. The water dispenser works fine. The refrigerator is not quite 2 yrs old and it has done this since we bought it. Any help would be appreciated. Thank you.