LG Dishwasher Error Code FE — Water Overflow Error
What this means
The FE error code means the LG dishwasher has detected that the water level in the tub has exceeded the normal level. This can be caused by a stuck-open water inlet valve, a malfunctioning water level sensor (float switch), or a siphoning issue from the drain hose. The dishwasher stops as a flood-prevention measure.
Step-by-step fix
4 stepsTurn off the water supply
Immediately turn off the water supply valve under the sink. If the dishwasher is actively filling and won't stop, cutting the water supply is the first priority to prevent flooding.
Check the float switch
Open the dishwasher door and locate the float assembly at the bottom of the tub (usually a small dome or cylinder). Lift it up and let it drop — it should move freely. If it's stuck in the down position by food debris or a utensil, it cannot signal the control board to stop filling.
Keeping the area around the float clear of debris prevents FE errors.
Test the water inlet valve
Turn off the water supply and unplug the dishwasher. If water continues to slowly trickle into the tub, the inlet valve is stuck open and must be replaced. This is a mechanical failure.
A stuck-open inlet valve is a flood risk — it should be replaced immediately.
Check for drain siphoning
Ensure the drain hose has a high loop under the counter (at least 20 inches above the floor) or is connected through an air gap. Without a high loop, dirty water from the sink can siphon back into the dishwasher.
When to call a professional
If the inlet valve is stuck open or the float switch mechanism is damaged, a technician can replace these components. The inlet valve is located underneath the dishwasher and requires disconnecting water and electrical connections.
Related error codes
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
Learn more about our sourcesParts you may need
Float Switch Assembly
Part #6600JB3007B · $15–$30
If float does not move freely or switch is faulty
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