LG Washing Machine Error Code FE1 — What It Means & How to Fix It

What Does This Error Mean?

The FE1 error means your LG washer has detected an overfill condition — too much water is in the drum. The machine detected water above the maximum safe level and is trying to protect against overflow. This is a serious error that can lead to water damage in your home if not addressed quickly. Turn off the water supply valve to the washer immediately if you see this error. The cause is usually a stuck-open water inlet valve or a faulty water level sensor.

Affected Models

LG WM3900HWA
LG WM4000HWA
LG WT7300CW
LG WT7150CW
LG WM2050CW

Common Causes

Water inlet valve stuck open and unable to close, allowing water to keep flowing in
Faulty water level pressure sensor reporting incorrect water level to the control board
Blocked or kinked pressure hose connecting the drum to the water level sensor
Control board fault sending continuous fill signal to the water inlet valve
Siphoning effect from the drain hose causing water to re-enter the drum

How to Fix It

Act immediately — turn off the water supply valve behind or beneath the washer. This stops more water from entering the machine. If you don't have a dedicated valve, shut off the main household water supply. This prevents water damage to your floor.

Every washer should have a dedicated shutoff valve for each hose (hot and cold). If yours doesn't, consider having one installed — this situation is exactly why they're important.
Unplug the washer from the wall outlet. This cuts power to the water inlet valve solenoid. On most valves, cutting power will cause the valve to close if it hasn't completely failed mechanically.

Some inlet valves fail in the 'open' position even without power — which is why shutting off the water supply valve is the more reliable step.
Drain the excess water from the washer. Use the manual drain hose in the lower access panel to drain the drum into a shallow pan. Remove the laundry once the water level is low enough. Do not attempt to run a spin cycle to drain — the FE1 condition must be diagnosed first.

Keep towels handy — overfilled machines have a lot of water to drain and it comes out slowly through the emergency drain hose.
Inspect the drain hose connection at the standpipe. The hose end should sit no more than 6 inches into the standpipe and should NOT be sealed airtight. A hose jammed too deep into the standpipe creates siphoning — water drains but then gets sucked back into the drum continuously.

The drain hose end should form a U-bend before entering the standpipe, or be secured with the included hose guide at the correct height.
With the water supply off and machine unplugged, have a technician test the water inlet valve. The valve is tested by measuring the solenoid coil resistance with a multimeter — typically 100-200 ohms for a good coil. A valve with a failed solenoid will need full replacement.

Water inlet valves cost $25-$75 for most LG models and take about 30-45 minutes for a technician to replace.

When to Call a Professional

FE1 often requires a technician because the water inlet valve is inside the machine. A stuck-open valve will keep causing overfills until physically replaced. Water level sensors and pressure hoses can also be tricky to diagnose without service experience. Technician repair typically costs $150-$300. If water has already overflowed onto the floor, also contact your insurance provider.

Frequently Asked Questions

Can FE1 cause water damage to my home?

Yes — that is the primary danger of this error code. An overfilling washing machine can spill dozens of gallons of water onto your floor very quickly. Water damage can soak into subfloors, rot joists, and cause mold growth. Act immediately when you see FE1: shut off the water supply before doing anything else.

My LG washer shows FE1 even after I fixed the drain hose — why?

If the drain hose was siphoning, fixing the hose height may resolve it. But if the water inlet valve itself is faulty and stays open even with no power, the siphon wasn't the problem. You can test this by: with the water supply on and the washer unplugged, watch whether water still trickles into the machine. If water flows in with no power, the inlet valve is mechanically stuck open and must be replaced.

How do I prevent FE1 errors in the future?

Turn off the hot and cold water supply valves to your washer when it's not in use. This is a good habit for all washing machines — hose failures and valve malfunctions are a leading cause of home flooding. Also make sure the drain hose is installed at the correct height (the U-bend must be at least 30 inches above the floor) to prevent siphoning.