had the same exact problem when my freezer ice machine stopped making ice. under warranty, the technician found that the water has frozen at the inlet of the ice machine. check the two water tube at the back of your fridge and follow the one that goes to the ice machine. you may use an hair dryer to melt the ice in the tube. i dont know how, but the tech manage to isolate the tube to prevent it to freeze again. no problems since 4 or 5 years now...