LG LDFN4542S how to clean the spray arms
Every two weeks, and when dishes come out dirty because spray holes are blocked.
Steps
- Check the lower spray arm's jet holes. Clear any food with a pin or a piece of stiff wire. Do not pull or turn the rolling sections by hand; they can break.
- Pull the upper rack forward and check the upper spray arm's jet holes.
- To remove the upper spray arm, turn the nut underneath 1/8 turn counterclockwise and pull the arm down.
- Rinse or shake out food particles, clear blocked holes with a pin, then rinse the arm under running water.
- Press the upper arm back into place and turn the nut 1/8 turn clockwise until it locks.
- Check that both spray arms turn freely.
Source: Maintenance: Cleaning the Spray Arm Source: Maintenance: Cleaning the Spray Arm, pp. 35–36
Other LDFN4542S procedures
- How to clean the filtersAfter 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.
- 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.