Water Filter for the LG LMXS30756S (LT800P)

LMXS30756S specifics — where the filter actually lives

Where the filter actually lives: in the fresh-food compartment — exact spot varies by dispenser layout — usually a kneeling-height or shoulder-height swap, not a teardown. Mechanically the LMXS30756S uses a push-and-twist cartridge: the short locking turn after the press is what keeps the seal honest between changes.

The small print owners learn the hard way: a first removal that fights a set o-ring, and a status light that needs a manual hold-to-reset before it acknowledges the new cartridge. Read the prefix and the maintenance writes itself: LM is LG’s 4-door Max designation proper, and the service literature files every one of these under the same cartridge line. That 6S suffix is trim-level shorthand. LG kept the LT800P bay common to every finish in the line.

LM vs LF — what the prefix tells you

Catalog shorthand: LM marks 4-door Max builds and LF marks French-door builds. Cross-checking the prefix before ordering is faster than returning the wrong cartridge. 30 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.

LMXS30756S filter questions