Replace the water filter:
Approximately every 6 months.
When the Replace Filter h icon or the indicator light turns on.
When the water dispenser output decreases.
When the ice cubes are smaller than normal.
To purchase a replacement water filter:
Visit your local dealer or distributor
Search using "water filter" on lg.com
Use replacement cartridge: ADQ36006113
If the top shelf, located below the water filter, is in the highest position, it will need to be removed prior to replacing the water filter.
To remove any shelf, tilt up the front of the shelf and lift it. Pull the shelf out.

Pinch the sides to open the water filter cover.

Pull the water filter downward and turn it counterclockwise before pulling it out.
Make sure to rotate the filter down completely before pulling it out of the manifold hole.
Replacing the water filter causes a small amount of water (around 1 oz. or 25 cc) to drain.
Wrap a cloth around the front end of the water filter cover to collect any leaking water. Hold the water filter upright, once it is removed, to prevent any remaining water from spilling out of the water filter.

Replace with a new water filter.
Take the new water filter out of its packing and remove the protective cover from the o-rings. With the water filter tabs in the horizontal position, push the new water filter into the manifold hole and turn it clockwise until it stops.

Close the water filter cover. The cover will click when closed correctly.

After the water filter is replaced, dispense 2.5 gallons of water (flush for approximately 5 minutes) to remove trapped air and contaminants from the system.
Do not dispense the entire 2.5 gallon amount continuously. Press and release the dispenser pad for cycles of 30 seconds ON and 60 seconds OFF.
After changing the filter, press and hold the Water Filter button for 3 seconds to reset the indicator light.
Do not operate refrigerator without water filter or water filter bypass plug installed.
Keep the water filter bypass plug. You must use the water filter bypass plug when a replacement water filter cartridge is not available.