LG Washer Error Code mE — What It Means & How to Fix It

What Does This Error Mean?

The mE error means your LG washer has a motor error. The main motor that spins the drum has stopped working properly. The washer cannot continue the cycle.

Affected Models

WM3900HWA
WM4000HWA
WM5000HVA
Most LG front-load washers

Common Causes

Motor overheating due to continuous heavy loads
Worn or damaged motor windings
Loose or broken wiring connection to the motor
Motor control board (inverter board) failure
Foreign object jammed in the drum preventing motor rotation

How to Fix It

Turn off the washer and unplug it.

Let it rest for 30–60 minutes. The motor may have overheated and needs to cool down.
Check the drum for any foreign objects.

Reach inside and turn the drum by hand. It should spin freely with some resistance.
If the drum is hard to turn or makes a grinding noise, something may be jammed.

Do not force the drum. Unplug the machine and investigate.
Plug the washer back in and try a short cycle.

If mE returns within seconds, the motor or inverter board needs professional diagnosis.
Call LG support or a certified technician.

A technician can test the motor and inverter board with specialized tools.

When to Call a Professional

Motor and inverter board repairs are not DIY-friendly. This requires a qualified appliance technician. Motor replacement costs $200–$450 depending on the model. Inverter board replacement costs $150–$300. Contact LG support for authorized service.

Frequently Asked Questions

What is the difference between mE and LE on an LG washer?

The LE error means the motor is locked — it can't rotate. The mE code means the motor is running but has a fault. Both require professional attention.

Can an LG washer motor overheat from normal use?

Yes — running many back-to-back heavy loads can overheat the motor. Let the machine rest between large load cycles. An overheated motor usually cools down and works again after 30–60 minutes.

How much does an LG washer motor replacement cost?

Parts alone can range from $100–$250. With labor, total costs are typically $200–$450. Ask about the motor warranty — LG motors often have extended coverage.