I have a Samsung fridge with water/ice dispenser, the ice maker is in the top refrigerator section. The icemaker freezes up stops making ice. I browsed for my model an found this is a common issue. There are codes for mine to defrost etc... I found these to be ineffective in my situation. I remedied this by removing the ice tray/dispenser, using a hair dryer ,with a dish towel folded on the bottom and manually defrosted the ice maker. To completely defrost takes about 10 min or so. I do this 2 months apart give or take. whenever it stops making ice. it seems that if you regularly use up the ice it freezes up less often. good luck, my extended warranty didn't see it as there problem and Samsung hasn't remedied this issue.
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