Replace the filter by turning off the water supply, locating the filter cartridge inside the ice maker compartment, twisting it counterclockwise to remove it, and installing a new LG-brand cartridge by twisting it clockwise until snug

The water filter in an LG ice maker typically needs replacement every six months, depending on your water quality and how often you use the ice maker. A clogged filter reduces ice production, slows water flow, and can affect the taste of your ice. The entire job takes about five minutes and requires no tools beyond your hands.

LG ice makers use a cartridge filter that screws into a housing inside the ice maker compartment. The filter catches sediment, chlorine, and other particles before water reaches the ice-making mechanism. When the filter becomes saturated, water pressure drops and ice production slows noticeably.

Key Takeaways

  • Turn off the water supply to your refrigerator before removing the old filter to prevent water from spraying into the ice maker compartment.
  • The filter cartridge is located inside the ice maker housing, usually on the right side or back wall, and twists out counterclockwise by hand.
  • You must use an LG-brand replacement cartridge that matches your specific ice maker model number to may support proper fit and water flow.
  • After installing the new filter, run water through the ice maker for 30 seconds to flush air from the line before making ice.
  • Mark your calendar or set a phone reminder for six months after installation so you remember when the next replacement is due.

Locate your ice maker's water filter

Open your refrigerator and find the ice maker compartment. On most LG models, the ice maker sits in the upper freezer section on the right side, though some models place it on the left. Look inside the ice maker housing for a cylindrical cartridge about three to four inches long, usually white or translucent plastic.

The filter cartridge screws into a housing that connects to the water line. You will see it mounted vertically or at an angle inside the ice maker. If you cannot locate it when ready, check your refrigerator's manual for the exact position—different LG models vary slightly in filter placement.

Turn off the water supply before you start

Locate the water shut-off valve behind your refrigerator. This valve is usually a small knob or lever on the water line that feeds into the back of the fridge. Turn it clockwise (or pull the lever to the off position) until the valve stops. This prevents water from spraying out when you remove the old filter.

If you cannot find the shut-off valve behind the refrigerator, locate the main water shut-off for your house and turn that off instead. This takes longer but ensures no water pressure reaches the ice maker. Test that the water is off by opening the refrigerator's water dispenser—no water should flow.

Remove the old filter cartridge

Grip the filter cartridge firmly with your hand. Turn it counterclockwise (to the left) slowly and steadily. The cartridge will unscrew from the housing after two to four full rotations. Some water may drip out as you remove it, so have a small towel or cup ready to catch it.

Once the cartridge is loose enough, pull it straight out of the housing. Do not force it—if it resists, turn it counterclockwise a bit more. Dispose of the old cartridge in your trash. Wipe the inside of the filter housing with a clean, dry cloth to remove any sediment or debris that may have accumulated.

Install the new LG filter cartridge

Before opening the new filter, check that the model number on the box matches your ice maker model. Common LG filter models include LT500P, LT700P, and LT1000P. Using the wrong cartridge can result in poor water flow or leaks. The correct model number is printed on your refrigerator's specification label, usually on the back wall inside the fridge.

Remove the new cartridge from its packaging. Some cartridges come with a protective cap on the inlet end—remove this cap before installation. Insert the cartridge into the housing and turn it clockwise (to the right) by hand until it is snug. Do not over-tighten; stop when you feel firm resistance. The cartridge should not spin freely, but you should not need to force it either.

Flush the line and restore water pressure

Turn the water shut-off valve back on by rotating it counterclockwise (or pulling the lever to the on position). Water will now flow through the new filter. Open the refrigerator's water dispenser and let water run for 30 seconds to flush air from the line and remove any loose particles from the new filter.

After flushing, close the water dispenser. The ice maker should now produce ice normally. The first batch of ice may look slightly cloudy or have an off taste because the filter is still settling—this is normal and will clear after one or two ice cycles. If water leaks from the filter housing, turn off the water supply, remove the cartridge, and reinstall it, making sure it is seated properly in the housing.

Know when to replace the filter again

Most LG ice maker filters are rated for six months of use before they need replacement. However, this timeline depends on your water quality. If your tap water is very hard or contains high levels of sediment, the filter may clog faster and need replacement every three to four months. If your water is very clean, it may last longer than six months.

Watch for signs that the filter is clogging: ice production slows, the ice maker makes unusual noises, or water flows more slowly from the dispenser. Any of these signals means it is time to replace the filter, even if less than six months have passed. Set a reminder on your phone or calendar for six months after installation so you do not forget.

Frequently Asked Questions

What happens if I use a non-LG filter cartridge?

Non-LG cartridges may not fit properly in the housing, causing water to bypass the filter or leak around the edges. They may also restrict water flow more than LG cartridges, slowing ice production. Always use an LG-brand cartridge that matches your ice maker model number to may support proper fit and performance.

Can I clean and reuse the old filter instead of replacing it?

No. Water filters cannot be effectively cleaned once saturated with sediment and chlorine. Attempting to rinse or reuse a filter will not restore its filtering ability and may introduce bacteria into your ice maker. Always install a new cartridge.

Why is water leaking from the filter housing?

Water usually leaks because the cartridge is not seated properly or is not twisted tight enough. Turn off the water, remove the cartridge, and reinstall it, making sure it twists all the way into the housing until snug. If leaking continues, the housing itself may be cracked and may need professional repair.

Do I need to turn off the ice maker before replacing the filter?

You do not need to turn off the ice maker itself, but you must turn off the water supply valve. Turning off the water prevents pressure from building in the line while you work. The ice maker will straightforward stop producing ice until water pressure is restored.

How do I know which LG filter model I need?

Check your refrigerator's model number, printed on a label inside the fridge or on the back. Write down this model number and search for it on LG's website or call LG customer service—they will tell you the correct filter cartridge model. You can also check your refrigerator's manual, which usually lists the compatible filter model.