Water Filter for the LG LFX25950SB (LT600P)

LFX25950SB specifics — where the filter actually lives

The LFX25950SB carries its water filter in the fresh-food compartment, typically the upper back wall in most French-door layouts, so expect to clear one shelf edge before you have working room. This is a push-twist style bay: a push to register, a turn to lock; the sequence is printed on most cartridges for a reason.

Owners of the LFX25950SB report the same friction points: the reset control is the step everyone skips; the light will not acknowledge a new cartridge on its own. The LF in LFX25950SB is doing real work: it places the machine in LG’s French-door family, which pins down the cartridge line, the reset behavior, and the service documentation worth consulting. The SB tail marks finish variants of one chassis; the filter bay is shared across the entire finish range.

LF vs LS — what the prefix tells you

Same parts shelf, two cabinet missions — split by cabinet mission (French-door versus side-by-side), joined by cartridge line — that is the LF/LS story. Capacity check: the 25 cu ft in the code is the box size, and bigger boxes push more water through the same cartridge between swaps.

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.

LFX25950SB filter questions