Where in the world are you?
How old is the appliance?
What is the fridge display showing?
Is there any ice behind the drawers at the bottom of the fridge?
Brentwood, Essex CM14 area.
3 years old,
Fridge flashing number 1
No ice behind drawers
OK, thanks for that.
If your freezer is working OK, phone Samsung and tell them you're having trouble with the fridge.
Tell them that you are not getting any cooling any more and previously you had heard a noise in the fridge.
Last year on BBC Watchdog Samsung admitted there were problems with the RS21 and extended the warranty to 5 years for the fridge cooling problem only.
Phone them up and see if they'll agree to repairing your one.
You may have to embellish a little.
The normal thing that happens is the fridge evaporator completely blocks with ice, the fan starts making a noise until the ice jams it and the fridge doesn't cool properly.
Has to be worth a try, otherwise you're probably looking at a system fault and this would require an engineer to check for gas leaks in the system.
Good luck with it.Let me know how you get on.