LG LDFN4542S foam in the tub or poor washing
Cause 1 of 2The rinse aid setting is too high. Source: Rinse Aid Dispenser Adjustment, p. 31
First checkLower the rinse aid level.
Causes and checks
The rinse aid setting is too high. Source: Rinse Aid Dispenser Adjustment, p. 31
- Lower the rinse aid level. See Change the rinse aid setting.
The detergent is not made for dishwashers. Excess suds can also make the dishwasher leak. Source: Adding Detergent to the Dispenser, p. 30
- Use only detergent intended for dishwashers.
All 2 causes checked. Contact LG Electronics Customer Information Center: 1-800-243-0000.
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.
- Spots, streaks or poor drying2 causes in the manual. First: the rinse aid is empty (the Rinse Aid icon flashes) or the dispenser setting is too low.
- 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.