May be too new?!? Won't even come up on the LG parts breakdown, closest that would work for me was LRFC22750ST
Noise is louder inside, near the bottom. It's loud in the fridge inside, but much louder in the freezer drawer which is on the bottom
Evaporator fan motor is inside the freezer ( behind the false back wall ), this circulates the air in the freezer and blows the cold air from the freezer into the fresh food section.
Try talking to local LG servicer or LG themselves as some have been having problems with ice building up on the evaporator fan blade which causes noises or stops the fan from working...have your model and serial #'s ready.
The repair ( so far ) has been a new control board.