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LG LDFN4542S spots, streaks or poor drying

Cause 1 of 2The rinse aid is empty (the Rinse Aid icon flashes) or the dispenser setting is too low. Source: Adding Rinse Aid to the Dispenser, p. 31

First checkRefill the rinse aid dispenser.

Causes and checks

The rinse aid is empty (the Rinse Aid icon flashes) or the dispenser setting is too low. Source: Adding Rinse Aid to the Dispenser, p. 31
1. Refill the rinse aid dispenser.
2. Raise the rinse aid level, especially with hard water and calcium build-up. See Change the rinse aid setting.
The cycle has no drying phase. Turbo, Express and Rinse do not dry. Source: Wash Cycles, pp. 26–27
1. Add Extra Dry or Night Dry, or choose a cycle with drying.

Service

If the checks above do not clear it, contact LG Electronics Customer Information Center: 1-800-243-0000, lg.com/us/support. United States (Canada: 1-888-542-2623). Source: Troubleshooting: Error Messages, p. 38

Other LDFN4542S problems

Dishwasher is not draining well2 causes in the manual. First: the air gap or the in-sink garbage disposal is clogged. Both are household plumbing, not part of the dishwasher, and the warranty does not cover cleaning them.
Cycle does not start and the time flashes2 causes in the manual. First: the door was not closed within 4 seconds of pressing Start, or the door was closed without pressing Start. A tone sounds and the white time LED flashes.
Foam in the tub or poor washing2 causes in the manual. First: the rinse aid setting is too high.
White spots or odor inside the tubResidual soil, detergent build-up or hard-water deposits inside the dishwasher.

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.

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