Re: Faulty Samsung RS21DCNS
With out testing it is hard to tell.
The most likely fault is the freezer fan motor.
If you open the freezer door when the fridge freezer is running. Then press and hold the light switch, after 30 to 60 seconds you should here the fan motor start if it does not then it is most likely the fan faulty.
You can check the fridge fan motor the same way by opening the fridge door but make sure you only have one door open at a time when checking.
Bob