it possible the ice maker is faulty srs ice maker is same as rs21 ,
get them of ebay , this is cheapest i could find, guy has a Samsung spares shop and is Samsung authorized
its an easy diy repair - i think the guy on ebay has video on the listing on how to change the ice maker - basically 2 screws and a wire plug , 10 minute job
Item number: 280583239561
the guy who sells them also offers free advice
you can call him on 07407 734 204 - ALLY - he wont mind - just mention you got his number of a web forum
lorna, January 2014