Water Filter for the LG LMXC23746S (LT800P)

LMXC23746S specifics — where the filter actually lives

The filter bay on the LMXC23746S in the fresh-food compartment, placement dependent on the dispenser package — usually a kneeling-height or shoulder-height swap, not a teardown. Mechanically the LMXC23746S uses a push-and-twist cartridge: the keyed entry means no cross-threading, and the locking turn is short enough to do one-handed.

Owners of the LMXC23746S report the same friction points: the first removal takes more force than every later one, and skipping the reset leaves a change-light glaring at a perfectly fresh cartridge. LM is not a trim code, it is a chassis statement: when LG stamps LM on the plate it is sorting the machine into the 4-door Max class — same water path, same cartridge, different cabinet. Finish letter sets like 6S never alter the bay; the LT800P line fits the whole set.

LM vs LF — what the prefix tells you

The LM prefix sits next to LF in the catalog and the split is cabinet mission: The door count differs — 4-door Max against French-door — but the bay and the cartridge order do not. Size class 23 cu ft — worth knowing because a full household works a cartridge harder than the rated six months assumes.

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.

LMXC23746S filter questions