Home › Refrigerator Water Filters › LG › LSSC243ST
Water Filter for the LG LSSC243ST (LT600P)
✓ 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:
✓
LSSC243ST specifics — where the filter actually lives
The filter bay on the LSSC243ST in the lower fresh-food zone in most side-by-side layouts, knee height or below, a deliberate placement that keeps the swap away from the door seals and drawer rails. It is a push-twist bay — the keyed entry means no cross-threading, and the locking turn is short enough to do one-handed.
The recurring owner notes: 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. The LS prefix is the tell: the LS run is LG’s side-by-side series; across the run, the filter bay is one of the constants. ST is finish coding: handles, colors, panel options — none of it reaches the filter bay.
LS vs LF — what the prefix tells you
The catalog pairs LS with LF, and the split matters at order time: side-by-side versus French-door. Both generations draw from the same cartridge pool, so the prefix is a fit-check, not a barrier. The digits in the model number read as cabinet capacity (24 cubic feet), a decent proxy for how hard the filter works in daily service.
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.
LSSC243ST filter questions
How do I reset the filter light on the LG LSSC243ST?
Hold the filter-reset control a few seconds after the swap; the status light clears only with a seated cartridge, and the LSSC243ST manual maps the control by panel type.
Will the LG LSSC243ST dispense water without a filter cartridge?
No — the LT600P bay seals on the cartridge itself, so removing it just means unfiltered water until the next change, not a leak.
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 LT600P 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 LSSC243ST?
Every six months or at the rated gallon capacity, whichever comes first — the LT600P 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
This bay takes the OEM LT600P. ClearFit verified-fit alternatives for this exact slot are being staged — every compatible option for your fridge is one lookup away.
Check every filter that fits →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
Related guides
POPULAR GUIDE
How to change a Whirlpool refrigerator water filter
Every Filter 1–6 bay location — including the door-mounted bays on WRX models, with door-open angles and cap-release quirks. — read the guide →
POPULAR GUIDE
How to reset your Whirlpool filter light
Filter 1–6 indicator maps showing which key actually clears the light on your panel. — read the guide →
WATER PROBLEM GUIDE
Does your fridge filter remove fluoride?
What EDR1RXD1-class carbon blocks actually take out — and the systems that do remove fluoride. — read the guide →