The Samsung dishwasher error code LC indicates that the appliance has detected a leak or the presence of water in the base/flood tray (a leak detection/flood sensor activation). This safety feature immediately pauses the cycle to prevent further water damage and electrical hazard. Common user impacts include an interrupted or cancelled wash cycle, water on the floor, potential damage to cabinets or flooring, longer drying times or incomplete cycles after reset, and — if ignored — increased risk of mold, corrosion, and electrical shorts. The LC code can be triggered by an actual leak (hose, pump, gasket, or tub crack), overflow conditions (blocked drain or excessive suds), or by a faulty leak/flood sensor or control board reporting incorrectly.
Common causes
- Leaking drain hose or loose hose clamps
- Damaged or worn door gasket/door seal
- Cracked sump, pump housing, or outer tub allowing water into the base
- Faulty drain pump or pump seal leaking into the base
- Failed leak/flood sensor or float switch in base (false trigger)
- Clogged or blocked drain causing overflow
- Inlet valve stuck open or water inlet hose leak
- Excessive sudsing from wrong detergent or too much detergent
- Loose or damaged wiring to sensor or control board
- Corrosion or rust creating small leaks over time
Troubleshooting steps
- Power off and isolate water: Switch off the dishwasher at the breaker and shut off the water supply to minimize risk and stop further leaking.
- Check for visible water: Pull the dishwasher out (if possible) and inspect the floor and base area. Dry any water in the base with towels. Remove the lower kick plate to look into the base/flood tray area.
- Reset the dishwasher: After drying the base and verifying no continuing leak, restore power and water, then perform a reset (power off for 1–5 minutes, then power on). If LC clears but returns, further investigation is needed.
- Inspect hoses and clamps: Visually inspect the drain hose, inlet hose, and hose clamps for cracks, splits, or loose fittings. Tighten or replace parts as needed.
- Examine door gasket and door area: Check the door seal for tears, gaps, or debris preventing a tight seal. Clean or replace the gasket if damaged.
- Check the pump and sump area: Remove the filter and lower rack; inspect the pump housing and sump for cracks or leaks. Look for water stains, corrosion, or loose hose clamps at pump connections.
- Test the leak/flood sensor and float switch: If accessible, inspect the sensor for corrosion, foreign debris, or loose connectors. Use a multimeter to test continuity if you are comfortable with electrical testing (power must be off and unplugged first).
- Look for signs of overflow/sudsing: Ensure you are using the co