There are three primary sources of noise that can come from a refrigerator: the evaporator fan, the compressor and the condenser fan. The evaporator fan is inside the freezer. It pushes freezer air across the evaporator coil to remove heat. read more
If your fridge is making a loud noise, the condenser fan motor could be to blame. The condenser fan motor runs at the same time as the evaporator motor and the compressor. In addition to noise, your fridge might not be staying as cool as normal and/or may be turning on and off regularly. read more