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Water Filter for the LG LMX28988ST (LT700P)
✓ 100% compatible — no bypass plug needed
🔧 5-min push-in swap
🇺🇸 Ships from Indiana
Every cartridge that fits this model — pulled live from the catalogue:
✓
LMX28988ST specifics — where the filter actually lives
On the LMX28988ST, the cartridge in the fresh-food compartment — exact spot varies by dispenser layout, the same estate every 4-door Max refrigerator in this family uses. This is a push-twist style bay: the short locking turn after the press is what keeps the seal honest between changes.
Order-day practicalities: the line is still live when you open the bay, so keep a towel in reach, and expect the filter-status light to need a reset before it believes the new cartridge. Prefix literacy pays here: LG built these as 4-door Max machines, and the filter bay inherits the geometry that implies, including where the dispenser feed runs. ST is finish coding: handles, colors, panel options — none of it reaches the filter bay.
LM vs LF — what the prefix tells you
LM versus LF is the first fork in the parts catalog: Ordering by prefix works because LM means 4-door Max and LF means French-door in this catalog — and the cartridge pool overlaps both. Cabinet decode: 28 cu ft — the number that tells you whether this cartridge feeds a family-size dispenser or a compact one.
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
| What it targets | Standard that covers it |
|---|---|
| Chlorine taste & odor | NSF/ANSI 42 — aesthetic effects |
| Particulates, Class I | NSF/ANSI 42 — fine sediment |
| Lead | NSF/ANSI 53 — health effects |
| Cysts (cryptosporidium, giardia) | NSF/ANSI 53 — microbial |
| PFOA & PFOS | NSF/ANSI 53 (P473) — varies by cartridge |
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.
LMX28988ST filter questions
LG LMX28988ST: how do I clear the change-filter light?
Seat the new cartridge first, then hold the filter-reset control for a few seconds until the status light clears — the exact button placement varies by control panel, so check the LMX28988ST owner’s manual page for filter status.
Can I run the LG LMX28988ST with no cartridge installed?
The bay self-seals: with no cartridge the LMX28988ST still dispenses, just unfiltered. No bypass plug exists for this line.
Are off-brand filters safe for a LG refrigerator?
Certified aftermarket cartridges are built to the same NSF test standards as the OEM part, and federal warranty law (Magnuson-Moss) protects your coverage when you use them.
Why is the OEM LT700P cartridge so much more expensive?
Part of the OEM price is the badge and the distribution chain. Certified alternatives meet the same test standards at a lower unit price, especially in multi-packs.
How often should I replace the filter in my LMX28988ST?
Every six months or at the rated gallon capacity, whichever comes first — the LT700P class cartridges all share that service interval.
Do I need to turn off the water supply to change it?
No — the bay is designed for a live swap. Expect a small dribble, keep a towel in reach, and flush a couple of gallons through the new cartridge before the first glass.
Every filter that fits your fridge
| Cartridge | OEM LT700P | RECOMMENDEDLT700P Replacement Water Filter · 1-Pack – ClearFit |
|---|---|---|
| Price | OEM list | $15.49 |
| Verified fit | ✓ the bay cartridge | View & buy → |
This filter expires six months from today
Your HVAC filter is probably on a different cycle. Track them all in one place.
months until this filter should be replaced (200-gal rated life)
Free tool · tracks fridge + HVAC + whole-house · auto-refill optional
More models using this filter
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