LG LDFN4542S how to run Machine Clean

Once a month or every 30 cycles, when the Machine Clean icon flashes, or after a long period unused (then without any cleaning agent).

You need

• 3 tbsp (40 g) citric acid, or a dishwasher cleaning agent

Steps

1. Remove all dishes.
2. Put 3 tbsp (40 g) of citric acid in the detergent dispenser, or follow the instructions of a dishwasher cleaning agent. Do not use dishwasher detergent.
3. Press and hold Heavy for 3 seconds to select Machine Clean.
4. Press Start.

Source: Maintenance: Using Machine Clean Source: Maintenance: Using Machine Clean, p. 33

Used for

• White spots or odor inside the tub

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 clean the spray armsEvery two weeks, and when dishes come out dirty because spray holes are blocked.
• 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

1. 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.

Applies to

LDFN4542S (variant LDFN4542S.ASSESNA), LDFN4542W (variant LDFN4542W.ABWESNA), LDFN4542B (variant LDFN4542B.ABPESNA), LDFN4542D (variant LDFN4542D.ABDESNA). United States and Canada.

Source

Owner's Manual, Dishwasher LDF554 and LDFN454 models (abridged edition), MFL69261755 revision Rev.00, 2023-09-04

Last verified

13 November 2026

Handbook

LG LDFN4542S dishwasher in Dishwashers; all LG handbooks