LG Dishwasher FE Error — What It Means and Why It Happens
The FE code on an LG dishwasher is typically a flood or water-detection error: the appliance has detected water in the base pan (beneath the tub) or another condition indicating a leak or overfill. When the internal float, moisture sensor or leak detector senses unexpected water, the machine will usually stop mid-cycle, lock out functions and display FE to prevent further flooding and electrical hazards. This error can be caused by physical leaks (failed hoses, loose clamps, cracked tub, worn door gasket), failed components (leak/float switch, drain pump or inlet valve), or less commonly an electronic problem that misreads the sensor.
Typical user impacts include stalled wash cycles, standing water inside the dishwasher or on the kitchen floor, interrupted drying and longer cycle times while the appliance attempts to recover. If ignored, FE-related issues can lead to water damage to cabinetry and flooring, mold growth, and in rare cases an electrical short if water reaches electronic components — so it should be diagnosed promptly.
Common Causes
- Water in the base pan (actual leak) triggering the float or moisture sensor
- Faulty or stuck float switch (mechanical or electronic)
- Leaking water inlet valve or supply hose
- Cracked or damaged tub or door gasket allowing water to escape
- Drain pump or hose leak, loose clamps or fitting failures
- Blocked filter or drain causing overflow/backup
- Faulty moisture/leak sensor board or wiring harness
- Control board misreading sensor input or false error due to electrical faults
- Improper installation or dishwasher not level, causing leaks at the door
Troubleshooting Steps
- Power off and isolate: Turn off the dishwasher and unplug it, or switch off the circuit breaker. Shut off the water supply if you suspect an active leak. Safety first — do not work on a live appliance.
- Check the floor: Pull the dishwasher forward (with care) and inspect the floor under the unit and the base pan for standing water. Use towels or a wet/dry vacuum to remove any water.
- Dry the base pan and retest: If there is water in the base pan, dry it thoroughly. Some models will clear the FE after the water is removed and the float/sensor resets; power the unit back on and run a short diagnostic or rinse cycle to see if the code returns.
- Inspect the float switch/sensor: Locate the float in the base pan or the moisture sensor and make sure it moves freely. If it’s stuck, clean and reseat it. For a definitive check, test continuity with a multimeter (power off) per the service manual.
- Look for visible leaks: Inspect supply and drain hoses, hose clamps, the water inlet valve area, pump seals, and the tub for cracks. Tighten loose clamps and connections.
- Examine the door seal and spray arms: Worn door gaskets or obstructed spray arms can direct water toward