For anyone servicing the following LG refrigerator models---with an "ER/IF" error---with a Serial Number of 311KRxxx (November 2013) or older...
Replace the GrilleFan Assy (AEB73785610)
This GrilleFan replaces the following
The new GrilleFan Assy has a Heater mounted around the Ice Room Fan Motor---to eliminate frost/ice accumulation---which prevents "Ice Room" fan motor operation.
No instructions are provided with the GrilleFan kit.
On the *left side* of the freezer compartment---pull off/disconnect the yellow plug (defrost heater) and connect it into the new GF Assy heater harness.
Plug the new GF Assy heater harness---into the slot where the yellow (defrost heater) plug originally was connected to.
Install new GrilleFan Assy.
Re-install Freezer Door and food basket/drawers.