Water Filter for the LG LFX25974ST (LT500P)

LFX25974ST specifics — where the filter actually lives

Finding the bay is the easy part — this chassis puts it upper rear of the fresh-food section in most French-door builds with interior dispensers, a spot that survives trim changes across the LF run. Mechanically the LFX25974ST uses a push-and-twist cartridge: offer the cartridge to the header, press, and rotate until the stop catches; a towel handles the dribble.

Owners of the LFX25974ST report the same friction points: run the first gallon or two through a fresh cartridge before drinking — carbon fines are normal — and reset the indicator so the countdown matches reality. Read the prefix and the maintenance writes itself: LG uses it across the French-door range, which means shared cartridge economics — one media family, dozens of cabinet variants, all drinking from the same parts catalog. Trim code ST: cosmetic variants of one chassis, one cartridge family.

LF vs LS — what the prefix tells you

Same parts shelf, two cabinet missions — Ordering by prefix works because LF means French-door and LS means side-by-side in this catalog — and the cartridge pool overlaps both. 25 cu ft of cabinet — the dispenser sees heavy traffic at that size, and heavy traffic ages cartridges faster.

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

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.

LFX25974ST filter questions