LG Dishwasher Error Code FE — What It Means & How to Fix It

What Does This Error Mean?

The FE error means your LG dishwasher detected an overflow condition. Too much water entered the tub. This is a serious issue — turn off the dishwasher immediately.

Affected Models

LDF5545ST
LDT7808ST
LDFN4542S
Most LG dishwashers with digital displays

Common Causes

Faulty water inlet valve stuck in the open position
Defective water level sensor (float switch) not detecting full tub
Main control board malfunction sending wrong signals
Using too much detergent or the wrong type causing excessive suds
Drain issue preventing water from leaving during the cycle

How to Fix It

Turn off the dishwasher immediately and shut off the water supply valve.

The water supply valve is usually under the kitchen sink.
Mop up any standing water around and under the dishwasher.

Check under the unit and nearby cabinets for water damage.
Unplug the dishwasher or turn off its circuit breaker for 5 minutes.

This performs a hard reset of the control board.
Check if you used too much detergent or the wrong type.

Only use dishwasher-specific detergent. Regular dish soap causes excessive suds.
Plug the dishwasher back in and run a short cycle with the water supply on.

If the FE error returns, do not keep using it. Call a technician.

When to Call a Professional

The FE error usually requires professional repair. A stuck-open inlet valve can flood your kitchen if left unaddressed. Contact LG support or an appliance technician immediately. Expect repair costs of $150–$300 depending on the faulty part.

Frequently Asked Questions

Is the FE error dangerous on an LG dishwasher?

It can be — an overflow means water could leak onto your kitchen floor. Turn off the water supply and the dishwasher right away. Do not run it again until the problem is fixed.

Can I fix the FE error myself?

Basic troubleshooting like resetting and checking detergent is safe to do yourself. But if the inlet valve is stuck open, that requires professional repair. Do not attempt to replace the valve unless you have appliance repair experience.

How much does it cost to fix an LG dishwasher FE error?

If it was caused by wrong detergent, it's a free fix. A faulty inlet valve replacement typically costs $150–$250. A control board replacement can cost $200–$350. Get a diagnosis before committing to repairs.