LG LDFN4542S how to clean the filters
After each load for best results. With hard water, at least once a month with a soft brush. Also when OE appears or water drains poorly.
You need
- Soft brush
Steps
- Take out the lower rack and turn the bottom spray arm so the wider V opening faces the front.
WARNING
Be cautious of sharp edges when handling the stainless steel filter.
Marked WARNING by the manufacturer Source: Maintenance: Cleaning the Filters, p. 34
- Turn the inner filter counterclockwise and lift out the inner filter together with the stainless steel filter.
- Check the sump opening and remove any foreign objects.
- Clean the filters with a soft brush under warm running water. Use nothing abrasive.
- Reassemble the filters. With the spray arm's wider V toward the front, fit them into the holder and turn the inner filter clockwise until it clicks.
Source: Maintenance: Cleaning the Filters Source: Maintenance: Cleaning the Filters, p. 34
Used for
- OE: Drainage problem: water is not pumping out.
- Dishwasher is not draining well
Other LDFN4542S procedures
- How to clean the spray armsEvery two weeks, and when dishes come out dirty because spray holes are blocked.
- How to run Machine CleanOnce a month or every 30 cycles, when the Machine Clean icon flashes, or after a long period unused (then without any cleaning agent).
- How to clean the air gapWhen the dishwasher drains poorly or shows OE, if the sink has a drain air gap.
- How to change the rinse aid settingRaise it for spots, streaks, calcium build-up or poor drying; lower it if the dishwasher foams.
Sources
- Owner's Manual, Dishwasher LDF554 and LDFN454 models (abridged edition). LG Electronics Inc. Document MFL69261755, revision Rev.00, 2023-09-04, 48 pages, en-US. gscs-b2c.lge.com. Listed on the manufacturer's support page. Retrieved 13 November 2026.
Page numbers are the numbers printed in the manual. Where this page and the manual differ, follow the manual.