Water Filter for the LG LMX25988ST (LT700P)

LMX25988ST specifics — where the filter actually lives

On the LMX25988ST, the cartridge inside the fresh-food cavity, position varying with dispenser spec, a deliberate placement that keeps the swap away from the door seals and drawer rails. It is a push-twist bay — two motions, one orientation, five minutes including the cleanup.

Two quirks worth knowing before you order: expect dribble at the bay on removal even with the supply off, and remember the indicator will not self-clear — hold the reset control. The badge reads LMX25988ST, but the chassis reads LM: LM marks the 4-door Max line in LG’s catalog, so cross-referencing cartridges by chassis rather than by door style keeps you out of the wrong-parts queue. Trim code ST: cosmetic variants of one chassis, one cartridge family.

LM vs LF — what the prefix tells you

The LM/LF pair divides this family by layout — split by cabinet mission (4-door Max versus French-door), joined by cartridge line — that is the LM/LF story. the 25 cubic feet in the code is the size class; households that size move enough water that the six-month interval is worth honoring.

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.

LMX25988ST filter questions