If your oven is vented inside, the charcoal filter should be replaced every 6 to 12 months, and more often if necessary. The charcoal filter cannot be cleaned. To order a new charcoal filter, contact an LG Customer Information Center or visit the lg.com website.
Unplug the power cord and wear gloves.
Remove the vent cover screw. Open the oven door, hold both sides of the vent cover and remove it.

Remove the old charcoal filter.

Slide a new charcoal filter into place.

Slide the bottom of the vent cover into place. Push the top until it snaps into place. Tighten the screw to secure the vent grille in place.
Close the oven door, plug in the power cord and set the clock.