I've discovered the exactly same thing: The freezer fan's motor is busted (there are two fans - one in the refrigirator side and one in the freezer side).
Since the cooling all happens in the freezer side, that fan i crucial for both freezer and refrigirator. It is a bit tricky to take it all apart, but both the icemaker parts and the motor for crushing/dispensing ice, has to be removered before access to the fans cover plate.
The fan is run by a 13V 3.3W motor with the part code: 3015915900.
Search for the fridge's service manual for further details.
Cheeers
Thomas
July 2014