Hi
Is it the RS21 model? It will be a build up of ice around the fan probably, is the temprature in the fridge increasing? You need to take the plastic back panel off at the back of the inside of the fridge (where it lights up) and once you can see the fan use a hairdryer to melt it. Otherwise switch off the whole thing and it takes two days to defrost. How old is it, as it has recently been on Watchdog, Samsung admit they know there is a design problem on this fridge and are now extending the two year warrantly to five years, not a lot of use when you keep loosing a fridge full of food as the temprature is 15 degrees. I am going to challenge them that it is not fit for the purpose it was ourchased for and tell them to replace or refund. Good luck.
Paula, June 2008