Water Filter for the LG LRSC21934SB (LT500P)

LRSC21934SB specifics — where the filter actually lives

The LRSC21934SB carries its water filter in the fresh-food compartment, placement dependent on the dispenser package, a spot that survives trim changes across the refrigerator run. It is a push-twist bay — the short locking turn after the press is what keeps the seal honest between changes.

Two quirks worth knowing before you order: a stubborn first twist when the old o-ring has set, and a change-filter light that will not clear itself until you hold the reset. Under the cabinet differences one thing holds: the LT500P line — which is why fit listings key on chassis rather than door style. Finish letter sets like SB never alter the bay; the LT500P line fits the whole set.

Reading the LRSC21934SB model code — what the digits tell you

The 21 cu ft in the code is the size class; households that size move enough water that the six-month interval is worth honoring. Filter logic on this chassis: fit charts key on the LT500P cartridge family rather than the door configuration, so trim differences never change the order.

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.

LRSC21934SB filter questions