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

What Does This Error Mean?

The SE error means a control panel button on your LG dishwasher is stuck. The machine detects that a button is being held down without a cycle running. This prevents normal operation until the stuck button is freed.

Affected Models

LDF5545ST
LDFN4542D
LDT5678SS
Most LG built-in dishwashers

Common Causes

A button on the control panel is physically stuck or jammed
Food grease or moisture is trapped behind a button contact
The control panel membrane has warped from prolonged steam exposure
The touch panel's capacitive sensor is reporting a false press
A wiring fault is sending a constant button signal to the control board

How to Fix It

Turn off the dishwasher and unplug it from the wall outlet.

Wait 5 minutes for the control board to fully reset.
Inspect every button on the control panel.

Press each button and feel whether it springs back cleanly. A button that stays depressed is the likely culprit.
Dampen a soft cloth and gently clean around all button edges.

Grease and dried food can create a sticky film that traps button contacts. Do not spray water directly onto the panel.
Plug the dishwasher back in and try starting a cycle.

If SE is gone, the issue was a sticky button. Run a test cycle to confirm.
If SE returns immediately, the panel likely needs replacing.

Contact LG support or an appliance repair service with your model number.

When to Call a Professional

If cleaning doesn't resolve SE, the control panel needs replacing. LG dishwasher control panels cost $60–$160 for the part. A technician will add $75–$130 in labor costs. Do not use sharp objects to free stuck buttons — this cracks the panel.

Frequently Asked Questions

Is SE the same as bE on LG dishwashers?

They are similar but not identical. bE refers to a general button error. SE specifically indicates a stuck or shorted button contact. The troubleshooting steps are the same for both.

Can steam cause the SE error?

Yes. Over time, steam from hot cycles can seep behind the panel membrane. This causes button contacts to stick or creates false capacitive touches. Keeping the panel clean and dry after each cycle helps prevent this.

How much does a replacement LG dishwasher control panel cost?

Parts are typically $60–$160 depending on your model. Installation adds $75–$130 in labor. Always confirm your model number before ordering — panels are model-specific.