LG · Washing Machine

PE

Water Level Sensor Error

Severity

Medium

The error code PE on your LG Washing Machine indicates a specific system failure categorized as "Water Level Sensor Error". This guide walks you through the most likely causes and the correct repair sequence.

Owner's Summary

The water level sensor in your LG washer is giving incorrect readings. This sensor tells the machine how much water is in the drum — if it's wrong, the washer either adds too much or too little water. Checking the air hose for a simple clog is the free first step.

Symptoms

LG washer overfilling or underfilling, PE displayed on control panel

Common Causes

Faulty water level pressure sensor
Clogged pressure sensor air hose
Air leak in the pressure chamber or hose
Main PCB not interpreting sensor signal correctly

How to Fix

1 Locate thin pressure sensor tube and check for kinks, clogs or disconnections
2 Blow gently through the hose to clear any blockage
3 Test pressure sensor output with a multimeter
4 Replace pressure sensor if readings are unstable or out of range
5 Replace main PCB as last resort

Tools You'll Need

Multimeter Pliers

These are simple, low-risk fixes most homeowners can do with tools already in a basic toolbox.

Technical Explanation

LG pressure sensors use a variable capacitance design, outputting an analog voltage proportional to air pressure in the sensor tube. The EBR board's ADC reads this voltage and compares it to calibration data stored in EEPROM. A voltage outside valid bounds triggers PE.

Is It Safe to Keep Using?

Monitor fill levels closely. If the machine overfills, turn off the water supply tap immediately to prevent flooding.

Technician's Pro Tip

The pressure sensor tube on LG machines is prone to developing micro-cracks at the bend points. Hold the tube up to a light and flex it gently — if you see light through a crack, replace the entire hose rather than trying to seal it.

Related Codes

E2 — Samsung Washing Machine

Water Supply Error

High

4E — Samsung Washing Machine

No Water Supply Detected

High

5E — Samsung Washing Machine

Drain Error — Water Not Draining

High

Frequently Asked Questions

What does error code PE mean on a LG Washing Machine?

Code PE on a LG Washing Machine indicates "Water Level Sensor Error." In practice, the most common trigger is faulty water level pressure sensor. Severity is rated medium, and typical repair costs range from $15 to $180.

Can I fix PE myself, or do I need a technician?

Many cases of PE can be resolved without a technician. The first step to try: locate thin pressure sensor tube and check for kinks, clogs or disconnections. If that doesn't clear the code, work through the remaining steps in the "How to Fix" section above before assuming a part needs replacing.

Is it safe to keep using my washing machine with code PE showing?

Monitor fill levels closely. If the machine overfills, turn off the water supply tap immediately to prevent flooding.

How much does it cost to repair PE on a LG Washing Machine?

Repair costs for code PE typically range from $15 to $180. Pressure sensor: $15–$60; PCB: $80–$180. Costs on the low end usually reflect a DIY fix with no parts required, while the high end reflects a part replacement plus professional labor.

Estimated Repair Cost USD

$15 – $180

Pressure sensor: $15–$60; PCB: $80–$180