Water Filter for the LG LMXS28596S (LMXS28596S)

LMXS28596S specifics — where the filter actually lives

Finding the bay is the easy part — this chassis puts it inside the fresh-food cavity, position varying with dispenser spec, a spot that survives trim changes across the LM run. Mechanically the LMXS28596S uses a twist-in cartridge: the ears on the cartridge neck are the guide — line them up, lift into the seat, and quarter-turn home.

Practical notes from the install forums: 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. LM is not a trim code, it is a chassis statement: LM is LG’s 4-door Max designation proper, and the service literature files every one of these under the same cartridge line. Finish codes such as 6S change the look, not the plumbing — order the cartridge by model, ignore the finish letter.

LM vs LF — what the prefix tells you

Same parts shelf, two cabinet missions — The 4-door Max/French-door split tracks the LM/LF prefixes — cartridge fit follows the water path, not the label on the door. capacity 28 cu ft: a mid-to-full-size cabinet whose dispenser traffic sets the realistic change cadence.

Swap it in 5 minutes

• Twist the old cartridge a quarter turn counterclockwise and pull it straight down — keep a towel in reach for the dribble.
• Fill the new cartridge with cold tap water so the chamber is not fighting an air pocket.
• Offer the new cartridge to the bay, push up, and twist a quarter turn clockwise until the stop catches.
• 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.

LMXS28596S filter questions