Chances are that the heating element has stopped working allowing frost build up, ice then builds up and freezes into a solid lump, stopping ice production and if you leave it too long will also stop removal of the ice drawer completely. If its still under warrenty get samsung to replace the heating unit for free as they did for me. Or else as I need to do as no longer under warrenty and its broken again, Turn off the whole Frdige every couple of weeks, remove the ice drawer and allow it to defrost. Its a pain but the the only to keep making ice without changing the heating element every 6 months, which is clearly a weak point on the icemaster unit.
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