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

What Does This Error Mean?

The AE error means your LG washing machine has detected a water leak. The leak sensor at the bottom of the machine has been triggered by water where it should not be. This is a critical error — the washer stops immediately to prevent water damage to your home.

Affected Models

LG WM3900HWA
LG WM4000HWA
LG WT7300CW
LG WM2250CW
LG WM8100HVA

Common Causes

A loose or damaged water inlet hose connection is leaking at the back of the machine
The door seal or gasket is worn, torn, or has debris preventing a tight seal
The drain hose is cracked or not connected securely, causing water to leak during draining
Internal components like the tub seal or water pump have developed a leak
Too much detergent created excessive suds that overflowed past the door seal

How to Fix It

Stop the wash cycle immediately and turn off the washer. Unplug it from the wall outlet for safety.

Standing water and electricity are a dangerous combination. Always unplug before investigating.
Check the water inlet hoses at the back of the machine. Look for drips or moisture at the connections where the hoses meet the washer and the wall valves.

Tighten any loose connections by hand. If a hose is cracked or bulging, replace it.
Inspect the door seal (the rubber gasket around the door opening). Look for tears, cracks, or debris stuck in the seal.

Wipe the seal clean with a damp cloth. Small objects like coins or hair pins can prevent a proper seal.
Check the drain hose at the back of the machine. Make sure it is securely connected and not cracked or kinked.

The drain hose connects to your standpipe or sink drain. A loose connection here can cause leaks during the drain cycle.
Clean the leak sensor at the bottom of the washer. Sometimes residual moisture triggers a false alarm even after the leak is fixed.

Tilt the machine slightly back and use a towel to dry the base pan. Then plug the washer back in and test with a small load.

When to Call a Professional

If the leak is coming from inside the machine rather than the hoses, a technician is needed. Internal leaks from the tub seal or pump require disassembly to access and repair. Professional repair for an internal leak typically costs $150 to $350 with parts and labor. Do not continue using the washer if you see water pooling underneath it.

Frequently Asked Questions

Is the AE error dangerous?

A water leak near an electrical appliance is a safety concern. Always unplug the washer before investigating the source of the leak. Do not ignore the AE error — even a small leak can cause significant water damage over time.

Can too much detergent cause the AE error?

Yes. Excess detergent creates too many suds, which can push past the door seal. Always use HE (High Efficiency) detergent in LG front-load washers. Use only the amount recommended on the detergent label — more is not better.

How do I check if the leak is internal or external?

Run a short cycle and watch the back and bottom of the machine carefully. If water appears at hose connections, the fix is simple — tighten or replace the hose. If water appears from under the machine with no visible hose leak, the problem is internal and needs a technician.