LG Fridge Water Filter Replacement | Which LT Filter Your LG Uses and How to Replace It 

LG Fridge Water Filter Replacement is one of the most important maintenance tasks for keeping your refrigerator’s water and ice clean and fresh. LG uses a completely different filter system than Samsung, relying on LT-series filters such as LT1000P, LT700P, LT800P, and LT600P. If you searched for a Samsung filter by mistake or need help identifying the correct LG filter, this guide explains everything you need to know about LG Fridge Water Filter Replacement, including filter compatibility, locations, and replacement steps.

If you own an LG fridge and searched for a Samsung filter by mistake, that is exactly what this guide is for. Here is the complete breakdown of LG’s fridge water filter replacement system, which filter your model needs, and how to replace it in under 3 minutes.

LG Fridge Water Filter Types | LT600P to LT1000P Explained

LG uses four main refrigerator water filter types across their lineup. The LT number tells you which generation of LG fridge you have. Newer models use newer LT filters. Here is the full breakdown:

The most important difference is that the LT1000P is the only LG filter certified to NSF 401  covering pharmaceuticals, DEET, and emerging contaminants. LT700P and LT800P are NSF 42 and 53 only. If you have a newer LG French door fridge, the LT1000P gives you noticeably better contaminant coverage than older LT filters.

Which LG Refrigerator Model Uses Which Filter?

The easiest way to avoid ordering the wrong part during an LG Fridge Water Filter Replacement is to match your refrigerator model number with the correct LT filter series before purchasing.

LG’s model numbers can look complicated but the first 3-5 letters are usually enough to identify your filter. LRFXS starts to mean LT1000P. LFX and LMXS mean LT700P. LSC and LSXS mean LT800P.

Where Is the Water Filter on an LG Refrigerator?

LG hides the filter in two different spots depending on fridge type and both locations surprise first-time replacers.

• French door LG fridges (LT1000P and LT700P): The filter is not in the upper interior like most Samsung or Whirlpool fridges. On LG French door models, it is behind the lower-left crisper drawer. Open the fridge, pull out the left crisper drawer completely, and you will see the round filter housing in the lower-left corner. This catches most people off guard the first time.
• Side-by-side LG fridges (LT800P): The LT800P filter is in the base grille at the bottom front of the fridge, same location as the old Whirlpool Filter 3. Crouch down, look at the bottom-left of the front grille, and you will see the filter slot.
• Older LG fridges (LT600P): Some older models have the filter in the upper-right interior, similar to Samsung’s older placement. Check behind the upper-right panel in the fresh food compartment.

If you cannot find it then check the LG owner’s manual. The filter location diagram is on page 3-5 in most LG fridge manuals.  

How to Replace an LG Refrigerator Water Filter

The replacement process varies slightly by filter location. Here is how each one works:

LT1000P and LT700P | Behind the crisper drawer

• Pull out the left crisper drawer. Remove it completely from the fridge, it usually just slides straight out.
• Find the filter housing. It is in the lower-left corner of the fridge interior. You will see a round housing with a push tab or twist mechanism.
• Remove the old filter. Turn counterclockwise a quarter turn, then pull straight out. Keep a cloth nearby.
• Insert the new filter. Remove the cap, push in and twist clockwise until it clicks.
• Replace the crisper drawer. Slide it back in.
• Reset and flush. Hold the ‘Filter Reset’ button on the control panel for 3 seconds. Run 2-3 gallons through the dispenser and discard.

LT800P | Base grille

• Locate the grille slot. Crouch down and look at the bottom-left of the front grille. The filter slot is there.
• Eject the filter. Push the eject button or turn the filter counterclockwise to release.
• Replace and lock. Insert the new LT800P and twist clockwise until it locks.
• Reset and flush. Hold Filter Reset for 3 seconds, then run 2-3 gallons through before drinking.

LG vs Samsung Fridge Water Filter | How the Systems Compare

If you are switching from a Samsung fridge to LG or shopping for a second fridge, it is worth understanding how these two filter systems differ:

The most notable difference is that LG’s LT1000P is the only LG filter with NSF 401 certification. Samsung’s HAF-QIN does not carry NSF 401, while the older HAF-CIN does. If pharmaceutical reduction matters to your household, an LG fridge with LT1000P actually has an edge over a Samsung with HAF-QIN.

Genuine LG Filter vs Compatible 

LG OEM filters are among the most expensive in the market. The LT1000P retails at $55-$65 per filter. That makes the compatible market more appealing and there are legitimate options.

Waterdrop makes NSF 42 and 53 certified compatible versions for all four LT filter types. Their LT1000P Plus and LT700P Plus models also carry NSF 401 certification, matching the genuine LG LT1000P on contaminant coverage at roughly half the price.

The standard caution applies if your LG fridge is under warranty, use genuine LG OEM. LG’s warranty terms, like Samsung’s, reference OEM filters for covered repairs. Once out of warranty then a reputable certified compatible is a legitimate option. Never buy uncertified generics.

Verify any filter’s NSF certification number at nsf.org before buying. Waterdrop and ICEPURE both publish verifiable NSF certification numbers for their LG compatible filters.

Frequently Asked Questions

What water filter does my LG refrigerator use?

Most newer LG French door fridges use the LT1000P (ADQ74793501). French door models from 2015-2020 use LT700P. Side-by-side LG models use LT800P.

Where is the water filter on an LG French door refrigerator?

Behind the lower-left crisper drawer, pull the drawer out completely to access the round filter housing.

Is the LG LT1000P better than the LT700P?

Yes, the LT1000P adds NSF 401 certification covering pharmaceuticals and DEET, which the LT700P does not have.

How often should I replace my LG refrigerator water filter?

Every 6 months or 200-300 gallons depending on your model, check the filter label for the exact capacity.

Can I use a Samsung filter in my LG refrigerator?

No. LG and Samsung use completely different filter systems. They are not interchangeable.