How to Replace the Water Filter in Your LG Refrigerator

Where to find your LG refrigerator filter and what type you have

LG refrigerators use one of two filter locations: inside the refrigerator compartment (usually in the upper right corner behind a small panel) or underneath the fridge in the base grille. Open your refrigerator door and look in the upper right area first — if you see a cylindrical cartridge behind a plastic cover or a small door, that is your filter location. If nothing is there, crouch down and look at the front base grille, where you will find a horizontal cartridge that twists out.

Write down your exact LG model number before you buy a replacement. You will find it on a sticker inside the fridge, usually on the wall behind the produce drawer or on the back wall. LG filters are model-specific, and buying the wrong one means wasted money and a filter that will not fit. Common LG filter models include the LT500P, LT700P, and LFXS26973S, but your model may differ.

Key Takeaways

LG refrigerator filters sit either in the upper right corner inside the fridge or in the base grille underneath, depending on your model.
Write down your exact model number from the sticker inside the fridge before buying a replacement filter.
The replacement process takes five minutes and requires only a quarter-turn twist or a straightforward push-and-release motion — no tools needed.
After installing a new filter, run water through the dispenser for 30 seconds to flush air from the line and clear any carbon dust.
LG recommends replacing the filter every six months, though the actual interval depends on your water quality and how much ice and water you use.

Removing the old filter from an upper-corner location

If your filter is in the upper right corner, locate the small plastic cover or door in front of it. Push or slide this cover to the side — it usually moves without tools. You will see the cylindrical filter cartridge behind it. Grip the filter firmly and turn it counterclockwise (to the left) about a quarter turn. It will loosen and you can pull it straight out toward you.

Some LG models use a push-release button instead of a twist. If you see a small button on the side of the filter housing, press it while pulling the cartridge out. Either way, the old filter will come free without force. If it is stuck, do not wrench it — stop and check that you are turning in the correct direction, or that you have found the right release mechanism.

Removing the old filter from the base grille

For filters located in the base grille underneath the fridge, you may need to remove a front panel or grille cover first. This cover usually snaps or clips on and pulls straight out toward you. Once the grille is open, you will see the horizontal filter cartridge. Grip it and turn counterclockwise about a quarter turn, then pull it straight out.

Some base-mounted filters have a release tab instead of a twist mechanism. Look for a small lever or button on the side of the cartridge. Press or pull it while sliding the filter out. Again, the filter should come free without force. If you are unsure which direction to turn, check the arrow printed on the filter itself — it will show the direction of water flow and often includes a rotation arrow.

Installing the new filter and priming the line

Before you install the new filter, remove the plastic cap or protective wrapper from the inlet end (the end that faces into the fridge). This cap keeps dust out during shipping. Slide the new filter into the housing until it stops, then turn it clockwise (to the right) about a quarter turn until you hear or feel it click into place. For push-release models, insert the cartridge and press the button until it locks.

After installation, go to your water dispenser and run water for 30 seconds without collecting it — let it flow into the sink. This flushes air from the line and removes any loose carbon dust from the new filter. Your water may look slightly gray or cloudy during this time; that is normal and will clear. If your fridge has an ice maker, run the dispenser again for another 15 seconds, then make a batch of ice and discard it before using the ice normally.

Resetting the filter indicator light

Most LG refrigerators have a filter status light on the control panel or inside the fridge door. After you install a new filter, this light needs to be reset so it tracks the new filter's life. Look for a small button labeled "Filter Reset" or "Water Filter" on the control panel. Press and hold it for three seconds until the light changes color or turns off.

If you cannot find a physical reset button, check your refrigerator's digital display or touchscreen. Some newer LG models have a menu option under Settings or Water Filter Status. Consult your owner's manual for the exact steps for your model, as the reset process varies. If you skip this step, the light will continue to warn you that the filter needs replacement even though it is new, and you will lose track of when the actual replacement is due.

How often to replace your LG refrigerator filter

LG recommends replacing the water filter every six months. However, the actual interval depends on your water quality and usage. If you have hard water, use the ice maker frequently, or dispense a lot of water, your filter will clog faster and may need replacement every three to four months. If you use the dispenser rarely and have soft water, the filter may last longer than six months.

Watch for signs that replacement is overdue: water flow slows noticeably, ice cubes become smaller or cloudy, or the water tastes or smells off. These are signs the filter is clogged and no longer removing contaminants effectively. The filter indicator light will also turn red or orange when the filter has reached the end of its service life, though this is based on time elapsed rather than actual water quality, so do not rely on it alone.

Troubleshooting common filter replacement problems

If the new filter will not turn or seat properly, stop when ready — forcing it can crack the housing. Remove the filter and check that you have the correct model for your refrigerator. Verify that the inlet and outlet ports on the filter line up with the housing. If they do not match, you have the wrong filter. Also check that you removed the plastic protective cap from the inlet end; leaving it on will prevent the filter from seating.

If water leaks from the connection after you install the new filter, the cartridge may not be seated fully. Turn it clockwise another quarter turn to may support it is locked in place. If leaking continues, remove the filter and inspect the rubber gasket (the ring around the inlet) for cracks or debris. A damaged gasket will not seal properly and the filter will need to be replaced. If the gasket looks fine, reinstall the filter and check again.

If the water dispenser produces no water after filter replacement, air may be trapped in the line. Run the dispenser for a full minute without stopping — this usually clears the air pocket. If water still does not flow, check that the filter is fully seated and locked. You can also try removing and reinstalling the filter to reseat it properly.

Frequently Asked Questions

Can I use a non-LG filter in my LG refrigerator?

Third-party filters that match your model number will usually work, but LG filters are designed specifically for your refrigerator's water pressure and flow rate. Using a filter not rated for your model can reduce water pressure, cause leaks, or fail to remove contaminants properly. Stick with LG-branded filters or filters certified as compatible with your exact model.

What should I do with the old filter after I remove it?

Most water filters can be recycled through your local waste management program or a retailer like Best Buy that accepts electronics. Some communities have special collection days for filters. Do not throw it in the trash if recycling is available. Check your city or county website for local filter recycling programs.

Why is my water cloudy after I install a new filter?

Cloudiness after filter replacement is almost always harmless air bubbles trapped in the line. Run the water dispenser for 30 to 60 seconds without stopping. The water should clear as the air is pushed out. If cloudiness persists after a full minute of running water, the filter may be defective and should be replaced.

Do I need to turn off the water supply before replacing the filter?

No. LG filters are designed to be replaced without shutting off the main water supply. You may see a small amount of water drip from the connection when you remove the old filter, so have a towel ready. This is normal and will stop once the new filter is installed.

How do I know if I have the right replacement filter?

Match your refrigerator's exact model number to the filter model number on the box. The model number is printed on a sticker inside the fridge, usually on the wall behind the produce drawer. If the numbers match, the filter is correct. You can also call LG customer service with your model number and they will confirm the correct filter part number.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.