This kit FOR SAMSUCKS ONLY (there are different kits for many Samsucks modela so check first)
DA82-02642A - Samsung Ice Maker Service Kit | Parts Dr PLUS a tube of Dow Corning 3140 RTV (get it off eBay it's expensive ) will fix your Samsung ice cube dispensers if you are willing to spend about $200 and DIY.
Here's a video how-to:
DA82-02642A - Samsung Ice Maker Service Kit | Parts Dr Note that this video does NOT show the DOW 3140 sealant but it is a must to complete the job. It gets applies all around the outside of the icemaker where it meets the inside of the fridge. Test the seal by shining a bright light outside the icemaker and make sure there is no light leakage inside the removed ice maker holder. Do it first BEFORE applying the sealant so you will see where all the warm air from the fridge is leaking in to the ice section. JUST SEALING will not fix it. You need the new controller board to adjust the defrost cycle plus the other parts that have been updated.
Edit: This is the proper sealant:
Samsung DA81-05595A A/S-EPOXY Sealant Dow Corning 3140 RTV 100ml RF28HMEDBSR 612058378637 | eBay