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Water Filter for the LG LFX21960ST (LT600P)
✓ 100% compatible — no bypass plug needed
🔧 5-min push-in swap
🇺🇸 Ships from Indiana
Every cartridge that fits this model — pulled live from the catalogue:
✓
LFX21960ST specifics — where the filter actually lives
The LFX21960ST carries its water filter inside the fresh-food cavity, upper zone in most French-door builds, so expect to clear one shelf edge before you have working room. This is a push-twist style bay: two motions and a flush — the entire service procedure for this bay design.
The small print owners learn the hard way: the change light ignores the new cartridge until you reset it, and the first removal always takes more muscle than the manual implies. LF is not a trim code, it is a chassis statement: LG built these as French-door machines, and the filter bay inherits the geometry that implies, including where the dispenser feed runs. Trim code ST: cosmetic variants of one chassis, one cartridge family.
LF vs LS — what the prefix tells you
Prefix families here: LF against LS. Chassis first: French-door (LF) versus side-by-side (LS). The shared cartridge line covers both without adaptation. Cabinet decode: 21 cubic feet — the number that tells you whether this cartridge feeds a family-size dispenser or a compact one.
Swap it in 5 minutes
- Press the release (if fitted), twist the old cartridge free, and pull it from the header.
- Wet the new cartridge’s o-ring with cold tap water so it seats without dragging.
- Push the cartridge square onto the header, then give it the locking quarter turn.
- Run two gallons through the dispenser to flush carbon fines, then hold the filter-reset control until the status light clears.
What this filter takes out of your water
| What it targets | Standard that covers it |
|---|---|
| Chlorine taste & odor | NSF/ANSI 42 — aesthetic effects |
| Particulates, Class I | NSF/ANSI 42 — fine sediment |
| Lead | NSF/ANSI 53 — health effects |
| Cysts (cryptosporidium, giardia) | NSF/ANSI 53 — microbial |
| PFOA & PFOS | NSF/ANSI 53 (P473) — varies by cartridge |
Coverage above lists what the standard addresses, not a performance claim for any specific cartridge — removal claims vary by certificate, so check the NSF listing for the exact part number you are buying.
LFX21960ST filter questions
How do I reset the filter light on the LG LFX21960ST?
Hold the filter-reset control a few seconds after seating the new cartridge; placements vary by control panel, and the LFX21960ST manual’s filter-status page has the exact spot.
Does the LG LFX21960ST need a bypass plug when the filter is out?
No — run it empty if you like; the LT600P bay needs no bypass plug, it simply passes water through untreated.
Are off-brand filters safe for a LG refrigerator?
Certified aftermarket cartridges are built to the same NSF test standards as the OEM part, and federal warranty law (Magnuson-Moss) protects your coverage when you use them.
Why is the OEM LT600P cartridge so much more expensive?
Part of the OEM price is the badge and the distribution chain. Certified alternatives meet the same test standards at a lower unit price, especially in multi-packs.
How often should I replace the filter in my LFX21960ST?
Every six months or at the rated gallon capacity, whichever comes first — the LT600P class cartridges all share that service interval.
Do I need to turn off the water supply to change it?
No — the bay is designed for a live swap. Expect a small dribble, keep a towel in reach, and flush a couple of gallons through the new cartridge before the first glass.
Every filter that fits your fridge
This bay takes the OEM LT600P. ClearFit verified-fit alternatives for this exact slot are being staged — every compatible option for your fridge is one lookup away.
Check every filter that fits →This filter expires six months from today
Your HVAC filter is probably on a different cycle. Track them all in one place.
months until this filter should be replaced (200-gal rated life)
Free tool · tracks fridge + HVAC + whole-house · auto-refill optional
More models using this filter
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