LG Washer Won't Turn On? 9 Things to Check Before Calling

Quick Answer

Start with the cheapest and easiest checks first: Is it plugged in? Is the outlet working? Is Child Lock (CL) active?

Start with the cheapest and easiest checks first: Is it plugged in? Is the outlet working? Is Child Lock (CL) active? These three catch the majority of no-power calls. If those check out, work down to the noise filter, door latch, thermal fuse, and main control board. This guide walks through all 9 causes in order from easiest to hardest.

LgWasherSeverity: lowDifficulty: intermediate75% DIY Success

Time to Fix

5–120 min

Difficulty

intermediate

Parts Cost

—

Tools Needed

Multimeter, Phillips screwdriver

Wrong code?

Not seeing WONTON on your display?

Select what your appliance is actually doing and we'll take you to the right guide.

buttons unresponsive

door not closing properly

power interrupted during cycle

What Does the WONTON Code Mean?

LG washers will not start for a range of reasons from trivial (CL active, tripped GFCI) to serious (failed noise filter or blown thermal fuse). The display being completely blank versus being lit but unresponsive are different failure paths - this guide covers both.

Most Likely Causes

Based on aggregated repair data, here is the probability breakdown for this error code:

GFCI outlet tripped or circuit breaker blown40%

Child Lock (CL) active — buttons locked out24%

Power cord damaged or not fully seated in outlet14%

Noise filter (LIFI board) failure blocking power to control board12%

Door latch not engaged (washer will not start without confirmed closed door)10%

Symptoms You May Notice

Display completely blank, no lights
Display on but buttons do not respond
Power button lights up but nothing starts
Washer clicks but does not power on
Washer turns on but will not start a cycle

Tools Required for Diagnosis

MultimeterPhillips screwdriverFlathead screwdriver

Diagnostic Checklist

Follow these steps in order. We start with the easiest external fixes before opening up the machine.

Check the power outlet and circuit breaker

Plug a lamp or phone charger into the same outlet. If it does not work, the outlet has no power. Check the circuit breaker panel for a tripped breaker in the laundry room - a tripped breaker sits in the middle position between On and Off. Flip it fully Off then back On. Also check for a GFCI outlet (has Test/Reset buttons) in the laundry room or bathroom - press Reset.

Check for Child Lock (CL) on the display

Inspect the door latch and seal

Test the wall outlet voltage

Check the noise filter (LIFI board)

Check the thermal fuse

Frequently Asked Questions

Why is my LG washer not responding to any buttons?

The two most common reasons are Child Lock (CL) being active, which disables all buttons except Power, and a failed noise filter (EMI filter) cutting power to the control board. Check the display for CL first. If no display at all, check the outlet and noise filter.

What is the noise filter on an LG washer?

The noise filter (also called the EMI filter or LIFI board) is a small circuit board where the power cord connects to the washer. It filters electrical noise from the power line to protect the control board. When it fails, the washer gets no power even though the outlet is fine. It is one of the most commonly replaced parts on LG washers that suddenly go completely dead.

How do I check if my outlet is providing power?

Plug something else into the same outlet - a lamp, phone charger, or anything you know works. If it works, the outlet is fine. If not, check for a tripped circuit breaker (look for a switch in the middle position in your electrical panel) or a tripped GFCI outlet (look for a small Test/Reset button on the outlet itself or nearby in the same bathroom or laundry room).

Can a blown thermal fuse prevent my LG washer from turning on?

Yes. A blown thermal fuse cuts all power to the control board and motor, making the washer appear completely dead. Thermal fuses are non-resettable - once blown, the fuse must be replaced. But always find and fix the root cause of overheating (blocked vents, failing motor) before replacing the fuse or it will blow again.

Related Lg Washer Error Codes

Code: CLLG Washer CL: Child Lock Active Code: DELG Washer DE Error: Door Not Detected Closed Code: PFLG Washer PF Error: Power Failure Code: RESETHow to Reset an LG Washer

Same Fix Works on These Brands

Lg shares the same hardware platform with these brands. The diagnosis and repair steps are identical.

Lg washerLG Washer Error Codes: Complete List With Fixes (2026)Lg washerLG Washer LE Error: Why the Motor Locked Up (Fix It Fast)Lg washerSUD on Your LG Washer? Too Many Suds (Here's the Real Fix)Lg washerLG Washer OE Code: Water Won't Drain (Troubleshooting Guide)Lg washerHow to Reset an LG Washer (Every Method, Every Model)Lg washerFE Code on LG Washer: Overfilling and How to Stop It

Models Known to Experience WONTON Errors

This repair applies to most Lg washers with this error code. Common model numbers include:

WM3700HWA, WM4000HWA, WM5000HVA, WM3900HBA, WT7300CW, WT7800CW, WM6998HBA, WM8100HVA

Last verified for technical accuracy on March 13, 2026