I too bought a Samsung fridge (model # RS2555SL, side by side) in Nov 2003. I bought the 5 year service performance plan from the store where I purchased the fridge. THANK THE LORD!
Suddenly in Sep 2008 my refigerator stopped cooling without warning and the temp just kept blinking. I called the warranty plan, a tech came out and said the regulater went and he would order the part and put it in. During that initial visit, he unplugged the unit, opened the door, and took out the drawers and shelving. Unplugged all wires inside behind the cooling draw and removed a cover to reveal a coiled unit that keeps the fridge cold. IT WAS COMPLETELY FROZEN OVER, the tech defrosted it with a blowdryer like item, hooked everything back up and set the tempurature. In an hour or so the unit was back to the right temp and the unit was working well UNTIL 1 WEEK LATER WHEN IT DIED AGAIN! I called the tech back, he came out again, same issue, ordered new parts (THE COMPUTER BOARD), defrosted it again, and for a week all was fine. The computer was replaced and still the same issue. After 5 more tech visits and replacing the entire back of the refrigerator the unit was deemed unrepairable and the warranty I purchased covered the cost of a replacement of equal value to the specs on the model that was a LEMON! OH and lets talk about the food spoilage that occured during these episodes, luckily I was reimbursed under the warranty for every loss of grocery episode. I hope all of you who are not under warranty find this helpful and maybe try to defrost the unit inside the fridge side. PLEASE REMEMBER TO UNPLUG THE UNIT FIRST.