Refrigerators · parts
LG LRFXS2503S refrigerator water filter: LT1000P
LG’s manufacturer page/specification for exact model LRFXS2503S lists LT1000P as the water-filter cartridge. LG 24.5-cu.-ft. three-door French-door refrigerator with integrated water/ice dispenser and Slim SpacePlus ice system. LG rates LT1000P for up to six months or 200 gallons and says to check the refrigerator’s model-specific filter finder/owner manual when unsure. Confirm the full label and cartridge mark; the inside air filter is a separate part.
Safety boundary
- Check the exact model owner’s manual before replacement. LG’s general replacement article says to close the water-supply valve first, but warns that some models allow replacement without closing it; follow the exact manual if instructions differ.
- Place a towel or cup under the filter to catch drips. Use the specific model’s location/removal steps and do not force a misaligned cartridge.
- LG’s article says to dispense about 2.5 gallons after a new filter and then hold the Water Filter button for three seconds to reset; check the exact model manual if the control or instructions differ.
- Stop and check for leaks after installation. Replace the cartridge at six months or earlier if flow slows or the filter indicator turns on; do not rely on the water filter to disinfect.
Compatibility requires a direct model listing, explicit supersession, or equivalent manufacturer evidence.
Models explicitly covered
These model identities have the source evidence listed below. Read the part decision and suffix limits before ordering.
Required identifiers
- Exact refrigerator model from the appliance label: LRFXS2503S.
- Full product code on LG support when present: LRFXS2503S.ASTCNA0.
- Water-filter cartridge marking: LT1000P. Do not confuse it with the LT120F interior air/odor filter.
Compatibility rules
- LG’s exact model source lists LT1000P for LRFXS2503S; this fit claim applies only to the listed model code and the source’s applicable product suffix.
- Match the full model code on the rating label, including finish or product-SKU suffix where present, and check LG’s water-filter finder if the label differs from this exact model.
- The water cartridge is separate from the LT120F interior air/odor filter; do not buy an air filter for the water system.
Never assume
- LT1000P fits every LG refrigerator or any model that shares a broad family name.
- A filter that looks similar, or an aftermarket package with a different model marking, is an exact-fit confirmation.
- The water filter and air/odor filter are interchangeable; LG lists the air filter as a different part.
- A contaminant-reduction claim or filtration certification makes microbiologically unsafe or unknown-quality water safe; use safe potable water and follow current certification scope.
- The replacement valve, removal direction, filter location, or indicator-reset control is identical across all LG refrigerator models.
Exact model-to-filter receipt
- Appliance model in LG’s manufacturer source: LRFXS2503S.
- LG’s exact US product page for LRFXS2503S names LT1000P under Water Filter and gives 24.5-cu.-ft. total capacity, an integrated ice/water dispenser, and Slim SpacePlus ice system. Its builder sheet lists the exact S SKU LRFXS2503S.ASTCNA0 along with the distinct D finish code; this page is limited to the exact S model.
- Exact fit claim: this model’s listed water-filter cartridge is LT1000P.
Water filter identity and limits
LG identifies LT1000P as a genuine replacement refrigerator water filter rated for up to six months or 200 gallons. Check the cartridge label and LG model filter finder for any variant not named in the cited model source.
The interior air/odor filter is a different part; this record covers the water cartridge only. Do not treat filtration or certification claims as disinfection.
Safe next step
Before ordering, compare the complete appliance label with the model above and verify the replacement cartridge is marked LT1000P. Follow the exact model owner’s manual for filter location, valve handling, installation and indicator reset.
LG’s general how-to says to catch drips, dispense about 2.5 gallons after changing the filter, and reset the filter indicator; use the appliance manual if its procedure differs. Check for leaks before returning to normal dispensing.