LG Washing Machine Error Code bE4 — What It Means & How to Fix It

What Does This Error Mean?

The bE4 error means there is a problem with one of the buttons on your LG washer's control panel. The machine detected that a button is stuck in the pressed position — or is being pressed continuously. This can happen if a button is physically jammed, or if the control panel is wet or faulty. The washer stops the cycle to prevent it from doing something unintended while a button is stuck. Often a simple cleaning or panel reset fixes it.

Affected Models

LG WM3900HWA
LG WM4500HBA
LG WM8000HVA
LG WM3997HWA
LG WM2050CW

Common Causes

A button physically stuck in the pressed position from detergent buildup or debris
Moisture or water inside the control panel short-circuiting the button circuit
A cracked or warped control panel causing permanent contact on a button
A faulty control panel board with a stuck button signal output
Child lock activation being confused with a button stuck error on some firmware versions

How to Fix It

Unplug the washer from the wall outlet and wait 2 minutes. This performs a hard reset of the control board. Plug it back in and try to start a cycle. If a temporary electronic glitch caused the error, this will clear it.

Do not simply press the power button — fully unplug the machine from the wall for a proper reset.
Inspect all buttons on the control panel carefully. Look for any button that appears pushed in further than the others, feels sticky, or doesn't spring back when pressed. Gently press each button several times to confirm it returns to the released position.

Dried detergent residue under and around buttons is a common cause of sticking. Use a slightly damp cloth to clean around the button edges.
Clean around all button edges with a lightly damp cloth. Avoid getting excess water behind the panel. Use a toothpick or soft brush to clear debris from around button stems. Dry the panel thoroughly before plugging the washer back in.

Never spray water or cleaning products directly onto the control panel — moisture damage is not covered under warranty.
Check whether the child lock feature is accidentally activated. On most LG washers, child lock is activated by holding two specific buttons simultaneously for 3 seconds. Check your owner's manual for the child lock combination and try deactivating it.

On some LG models the child lock indicator light is quite small and easy to miss. Look for a padlock icon on the display.
If none of the above steps work, the control panel assembly needs to be replaced. Search your washer's model number online to find the correct replacement panel. The panel typically unclips or unscrews from the front of the washer and the wire harness connectors detach by hand.

Take a photo of all wire harness connections before detaching them — this makes reassembly much easier.

When to Call a Professional

If cleaning the panel and resetting the machine doesn't clear bE4, the control panel assembly likely needs replacement. Control panels for LG washers typically cost $100-$200 for the part. Installation by a technician adds another $75-$150 in labor. Get a quote before ordering parts — it's worth comparing repair cost to the age of the machine.

Frequently Asked Questions

Why would a button get stuck on my LG washer?

The most common reason is dried detergent or fabric softener residue working its way under the button cap. This sticky residue prevents the button from fully returning after being pressed. Washing machines operate in a humid environment, which makes detergent residue even more adhesive over time. Regular cleaning of the control panel prevents this problem.

Can I still use my washer if I get a bE4 error?

No — the washer will refuse to start or will pause its cycle when bE4 is active. The machine won't operate with a stuck button because it can't safely know what function to perform. You need to resolve the button issue before normal washing can resume.

Is the bE4 error covered under LG's warranty?

If the control panel failed due to a manufacturing defect within the warranty period (usually 1-2 years for parts), LG should cover the repair. If the failure was caused by user damage — like water spilled on the panel or physical damage — it likely won't be covered. Contact LG support or an authorized service center to assess warranty eligibility.