Water Filter for the LG LMX28994ST (LT700P)

LMX28994ST specifics — where the filter actually lives

The LMX28994ST carries its water filter inside the fresh-food cavity, position varying with dispenser spec, a spot that survives trim changes across the LM run. It is a push-twist bay — two motions, one orientation, five minutes including the cleanup.

Two quirks worth knowing before you order: keep a folded towel under the bay before you open it; the line holds a cup of water even with the valve shut. Read the prefix and the maintenance writes itself: LM machines come from the 4-door Max program, and LG’s parts system rewards you for knowing it: one cartridge family covers the run. Finish codes such as ST change the look, not the plumbing — order the cartridge by model, ignore the finish letter.

LM vs LF — what the prefix tells you

The catalog pairs LM with LF, and the split matters at order time: LM means 4-door Max, LF means French-door. For filter shopping the distinction matters less than you would think — same line, different cabinet. the 28 cu ft figure in the code is the household size proxy; larger households breach the rated gallons before the calendar does.

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.

LMX28994ST filter questions