How to Replace the Water Filter on an LG Refrigerator

LG refrigerators use several different filter models depending on the year of manufacture and the refrigerator's configuration. Knowing which filter your specific model requires before you begin saves time and prevents an unnecessary return. The filter model number, the installation style, and the reset procedure all vary across the LG lineup -- this guide covers all of them.

Step 1 -- Identify the Right LG Refrigerator Filter

LG has used four primary filter models across its current and recent refrigerator lineup. The table below maps each filter to its installation location, the models it fits, and its gallon capacity.

The fastest way to confirm which filter your LG uses is to open the fresh food compartment and read the part number printed on the existing cartridge. If the filter has already been discarded or the label is unreadable, the DFS Fridge Filter Finder identifies the correct replacement using your refrigerator's brand, style, and filter location. Your LG refrigerator's model number -- on the sticker inside the fresh food compartment or behind the crisper drawer -- can also be entered directly into the DFS search bar.

Step 2 -- Locate the Filter in Your LG Refrigerator

On LG models using the LT700P, LT800P, or LT1000P, the filter is inside the fresh food compartment at the upper right corner. A flip-down cover protects the housing on most models -- open it fully before attempting to turn the filter, as the cover must clear the cartridge path before the filter will release.

On older LG and Kenmore models using the LT600P, the filter is also inside the fresh food compartment ceiling area, typically toward the center or left side. The housing door flips open and the filter slides straight down.

No tools are required for any current LG filter configuration. Keep a small towel nearby -- a few drops of water typically release when the old filter is removed.

Step 3 -- Remove the Old Filter and Install the New One

For LT700P, LT800P, and LT1000P (interior twist-in): Open the filter housing cover in the upper right interior of the fresh food compartment. Rotate the old filter counterclockwise a quarter-turn and pull it straight out. Remove the new filter from its packaging, peel off all protective caps, and inspect the O-rings -- confirm they are evenly seated before installation. A misaligned O-ring is the most common cause of drips after a filter change. Push the new filter into the housing and rotate it clockwise until it locks. The filter must be pushed firmly and fully rotated until it clicks into position -- if it is not fully locked, water will not flow from the dispenser or ice maker. Close the housing cover.

For LT600P (interior push-in): Open the filter housing door in the fridge ceiling. Push the old filter in slightly to release the lock, then pull it straight down and out. Hold the new filter with the alignment guide matching the notch in the receiver -- the filter must be correctly oriented before it will seat. Push it firmly straight up into the receiver until the spring-loaded blades click into the open position. This may require more force than you expect on the first installation. Close the housing door until it snaps closed.

Step 4 -- Flush the New Filter

Dispense 3 to 4 gallons of water through the refrigerator dispenser and discard it before drinking. New LG filters release harmless carbon fines and trapped air during the initial use -- both produce cloudiness and sputtering that clear quickly with flushing. If the refrigerator sits unused for several days after the filter change, flush an additional quart before drinking to remove stale water from the supply line. Discard the first one to two ice batches as well.

Step 5 -- Reset the LG Filter Indicator Light

LG refrigerators require a manual reset after every filter change. The indicator light does not detect whether a new filter is installed -- it runs on a timer that must be cleared after installation.

On most LG models with a dispenser control panel: press and hold the Filter or Water Filter button for 3 to 5 seconds until the indicator changes from red to green or turns off. On some LG French door models with a display panel, the button is labeled Light/Filter -- press and hold for 3 seconds. On LG models with a touch screen display, the filter reset option may appear in the Settings menu.

If the indicator does not reset after the first attempt, confirm the filter is fully locked in its housing -- a partially installed filter can prevent the reset from registering on some models.

Replacement LG Refrigerator Filters at DFS

DFS carries OEM LG filters and certified compatible replacements for all current LG filter models.

For the LT700P, the OEM LG LT700P is the genuine replacement, certified to NSF 42 and 53. The Tier1 LT700P replacement provides equivalent NSF 42 baseline performance at a lower cost. For households that want lead, mercury, cyst, and VOC reduction alongside chlorine performance, the Tier1 Plus LT700P is certified to NSF 42, 53, and 372 -- reducing lead to 99.6%, mercury to 92.2%, and cysts to 99.99% -- rated for up to 300 gallons or 6 months.

For the LT600P used in older LG and LG-built Kenmore models, the Tier1 Plus LT600P is certified to NSF 42 and 372, rated for 300 gallons or 6 months, and fits the full range of LG and Kenmore models that use the 5231JA2006A, 5231JA2006B, and related part numbers. The standard Tier1 LT600P is also available at the baseline NSF 42 tier.

For newer LG models using the LT1000P, the OEM LG LT1000P is certified to NSF 42 and 53, targeting lead, mercury, asbestos, benzene, and chlorine alongside particulates.

The full LG refrigerator filters collection at DFS covers all current and discontinued LG filter models in OEM and compatible options. For a detailed comparison of OEM vs. compatible options and NSF certification tiers, the fridge filter buying guide covers the decision framework across all major brands.

Questions about which LG filter fits your model? Call the DFS team at 1-800-277-3458.

Frequently Asked Questions

What water filter does my LG refrigerator use?

LG refrigerators use one of four main filter models depending on the series and year. The LT1000P fits most LG models from 2017 onward. The LT700P fits LG French door and side-by-side models from 2010 to approximately 2016. The LT800P fits select newer LG French door models. The LT600P fits older LG and LG-built Kenmore side-by-side and bottom-freezer models. The part number is printed on the existing cartridge and is the most reliable identification method.

How do I reset the water filter light on an LG refrigerator?

Press and hold the Filter or Water Filter button on the dispenser control panel for 3 to 5 seconds until the indicator changes from red to green or turns off. On some LG French door models the button is labeled Light/Filter. On touch screen models, the reset option may be in the Settings menu. If the indicator does not clear, confirm the filter is fully seated and locked in the housing.

Why is my LG refrigerator not dispensing water after I changed the filter?

A filter that is not fully locked in its housing will not allow water to flow. For twist-in models (LT700P, LT800P, LT1000P), the filter must be pushed firmly into the housing and rotated clockwise until it clicks into the locked position -- partial rotation leaves the water valve closed. Remove the filter, reinsert it with deliberate firm pressure, and rotate fully until locked.

Do I need to turn off the water supply to change an LG refrigerator filter?

No. LG filter housings are designed to seal the water supply automatically when the cartridge is removed. A small amount of water may drip during removal -- keeping a towel nearby is sufficient. No supply valve shutoff is required.

How often should I replace the LG refrigerator water filter?

Every 6 months or at the filter's rated gallon capacity -- 200 gallons for the LT700P, LT800P, and LT1000P, and 300 gallons for the LT600P -- whichever comes first. Households with high daily water usage may reach the gallon limit before the 6-month mark. Reduced dispenser flow, a change in water taste or odor, and cloudy ice are all reliable signals to replace regardless of schedule.

What is the difference between the LT700P and the LT1000P?

Both are interior twist-in filters for LG French door and side-by-side refrigerators, but they are not interchangeable -- the LT1000P replaced the LT700P in LG refrigerators manufactured from approximately 2017 onward and uses a different housing geometry. Installing the wrong model will result in either a poor fit or no water flow. Always confirm the correct filter by reading the part number on the existing cartridge or using the Fridge Filter Finder.

What is the difference between Tier1 and Tier1 Plus LG filter replacements?

Tier1 replacements are certified to NSF 42 (chlorine taste and odor) and NSF 372 (lead-free materials), providing equivalent baseline performance to the OEM filter at a lower cost. Tier1 Plus adds NSF 53 certification for health-contaminant reduction including lead (99.6%), mercury (92.2%), cysts (99.99%), and VOCs -- a meaningful upgrade for households with lead or health-contaminant concerns. Both install identically and fit the same housing.

Can I use a compatible replacement filter in my LG refrigerator without voiding the warranty?

In most cases, yes. The Magnuson-Moss Warranty Act generally prevents manufacturers from voiding a warranty solely because a certified compatible replacement part was used, provided the replacement meets the same performance specifications. Using an NSF-certified compatible filter is the appropriate standard for maintaining warranty protection.