Water Filter for the LG LMX25988SB (LT700P)

LMX25988SB specifics — where the filter actually lives

The filter bay on the LMX25988SB in the fresh-food compartment — exact spot varies by dispenser layout, the same estate every 4-door Max refrigerator in this family uses. Mechanically it is a push-and-twist seat: the cartridge goes in square, then a short rotation locks it against the header — no tools involved.

Practical notes from the install forums: a stiff first removal on builds that sat on the same cartridge for years, and an indicator light that wants a manual reset after a non-OEM cartridge is seated. The badge reads LMX25988SB, but the chassis reads LM: LG uses it across the 4-door Max range, which means shared cartridge economics — one media family, dozens of cabinet variants, all drinking from the same parts catalog. That SB suffix is trim-level shorthand. LG kept the LT700P bay common to every finish in the line.

LM vs LF — what the prefix tells you

LM versus LF is the first fork in the parts catalog: Chassis first: 4-door Max (LM) versus French-door (LF). The shared cartridge line covers both without adaptation. call it a 25 cubic feet box — which is why this cartridge works for a living rather than sitting decorative.

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.

LMX25988SB filter questions