LG refrigerator frosting up inside the freezer, but it's not a defrosting problem
LG Kenmore refrigerator frost
This service bulletin covers your model... it may be of assistance http://appliantology...er-compartment/
new grillefan has increased insulation.
Here's the upgraded evaporator fan: http://www.repaircli...er=795.78092900
Source: LG built Kenmore frosting in freezer, not defrost issue.