How do I troubleshoot my LG dishwasher?

To troubleshoot your LG dishwasher, follow a systematic process based on symptoms and error codes. First, check the display for error codes: AE or E1 means leak detected in base pan, dry the base pan and check for suds from wrong detergent; OE means not draining, clean filter and check drain hose and garbage disposal knockout; IE means no water entering, ensure water valve is open and inlet hose not kinked; LE means motor issue, check for jammed wash impeller; tE means temperature sensor error. Second, verify power and water: ensure dishwasher is plugged in and breaker not tripped, water supply valve under sink is fully open, and inlet hose not kinked. Third, clean filters: remove lower rack, twist and remove the cylindrical filter assembly at bottom, rinse under running water to remove food debris, and clean the coarse filter. Clean spray arm holes with a toothpick if clogged. Fourth, check for suds: if you see excessive foam, you may have used dish soap instead of dishwasher detergent, run a rinse cycle with no detergent to clear. Fifth, reset: turn off breaker for 5 minutes, press and hold Start for 5 seconds, turn back on. Sixth, check door latch and leveling: ensure door closes fully and dishwasher is level. If leak persists, remove kick plate, dry base pan with towels, and inspect hoses. Call LG support with model number if error returns.