My name is Peter. I am a retired field service refrigeration technician.
Based on your problem I do not need your model number. This is a high maintenance unit. You have a bottom freezer with the ice maker and bucket on the fresh food section door.
The error code IF is the ice maker fan. You have two fans, one for the freezer and one for the ice maker.
First, ice makers and ice buckets belong in the freezer section. When they are on the door they are exposed to the warm room air temperature and condensate forms freezing the ice cubs together. Then you open and close the fresh food section door you force warm air down the air vents to your ice maker fan and your ice maker fan freezes up and burns out trying to start.
Part #: 5209JA1044A Cost: $75.00
You can purchase it over the internet for a lot less.
Base on what you described, I suspect your ice maker fan over loaded your control board and damaged it.
Part #: EBR41956418 Cost: $125.00 You can get this over the internet for about $80.00 or less.
Now, how do you want to do this?
1.) You can pay for a $400.00-$450.00 service call?
2.) Or do it dirty. Kill the power to the ice maker fan and purchase ice cube trays and put them in your freezer.
a.) Purchase a new control board.
b.) Take the bottom kick plate off the front of the unit. You will need to pull the bottom freezer door out to do this. There are two fillips head screws holding this on. Remove the screws and the kicker plate, also called the toe plate.
c.) In the front there are 2 leveling screws. One on each side. These are hard to raise, you do not have much to grab on. I use channel locks. Turn counter clockwise to raise and clear the floor.
d.) Pull your unit out so you can get behind it.
e.) Behind the unit unplug the unit.
f.) On the left side there is a metal cover plate over your main control board.
g.) GROUND YOURSELF BY TOUCHING SOMETHING THAT IS BARE METAL. STATIC ELECTRICITY WILL KNOCK OUT YOU NEW CONTROL BOARD.
h.) Remove the metal cover - unscrew.
I.) There are several white pins holding the board on. There is a small leg on each pin that must be pressed in to release the board.
j.) Systematically go around the control board disconnecting one connector at a time and connecting to the new board. Each connector has a tab to squeeze to release.
k.) Push the board back onto the white retaining pins.
l.) Now we are going to disconnect the freezer fan. On the control board each connector is marked with a number below it. Look for, "CON 7". You are going to cut the two wires to disconnect power to your ice maker fan.
j.) On the Con 7, on the left cut the yellow wire with the black stripe and the solid blue wire. CUT THESE WIRES ABOUT 2" AWAY FROM THE CONNECTOR IN THE EVENT YOU WISH TO REPLACE THE ICE MAKER FAN IN THE FUTURE.
I would have thought with all of the recalls under warrantee that LG has had on this model that they would have stopped manufacture.
Where in the mountains is your unit?