LG Washing Machine PE Error: Water Level Sensor Fix

The PE error on your LG washing machine indicates a fault with the water level pressure sensor. The machine uses this sensor to know exactly how much water is in the drum at any point during the wash cycle. When the sensor sends a signal that is out of range or contradictory, the control board stops the cycle and displays PE. This error is less common than IE or OE but is usually diagnosable at home before calling a technician.

What Does the PE Error Mean?

PE stands for Pressure sensor Error. LG washing machines use a water level sensor (also called a pressure switch or pressure transducer) connected to the drum via a small rubber air tube. As water rises in the drum, air pressure increases in the tube, and the sensor converts that pressure into an electrical signal the control board reads to determine fill level. If the sensor reads an impossible value — such as a pressure that does not correspond to any known water level — the board concludes the sensor has failed and shows PE.

Common Causes of the PE Error in LG Washing Machines

Blocked or kinked pressure air tube: The small rubber or silicone tube connecting the sensor to the drum base can become clogged with lint, detergent residue or mould, or can kink due to movement, sending inaccurate pressure readings.
Faulty water level pressure sensor: The sensor membrane or internal electronics can fail due to age, moisture ingress or power surges, causing it to send incorrect signals continuously.
Loose wiring connector on the sensor: The sensor connects to the control board via a small wiring harness. A loose or corroded pin in the connector can break the signal path intermittently.
Excess suds interfering with pressure chamber: In rare cases, thick foam from overuse of detergent can enter the pressure tube connection point and block the air column, causing false pressure readings.

How to Fix the PE Error: Step-by-Step

Step 1: Reset the washing machine

Turn off and unplug the machine for 2 minutes, then restart. This clears temporary software glitches that can trigger false error codes. If the PE error does not return, the fault was transient.

Step 2: Locate and inspect the pressure air tube

The water level sensor is typically located inside the top panel of the machine (accessible after removing the top cover — two screws at the back). A thin rubber tube runs from the sensor down to the side of the drum. Inspect the tube for kinks, blockages or disconnection at either end. Blow gently through the tube to check it is clear. Reattach if it has come loose from either end.

Step 3: Check the sensor wiring connector

With the machine unplugged, locate the connector on the pressure sensor. Press it firmly until it clicks to ensure a solid connection. Inspect the pins for corrosion — a light clean with a dry cotton bud can improve contact. Reconnect and test.

Step 4: Test or replace the pressure sensor

If you have a multimeter, the pressure sensor can be tested for continuity across its terminals (refer to your service manual for exact resistance values). A sensor that reads open circuit or wildly out of spec needs replacement. Sensors typically cost ₹400–₹900 and can be ordered online for common LG models.

When to Call an LG Service Technician

If the PE error persists after checking the air tube and connector, the pressure sensor likely needs professional replacement. Contact LG India customer care (1800-315-9999) or visit an authorised service centre. Attempting sensor replacement without experience may void the warranty.

Need a replacement part? Browse compatible spares for your LG washing machine:

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Frequently Asked Questions

Can the PE error appear without an actual fault?

Yes — power fluctuations and sensor glitches can sometimes trigger false PE errors. A soft reset (unplug for 2 minutes) often clears these without any repairs needed.

How much does it cost to fix the PE error in India?

A replacement water level pressure sensor costs ₹400–₹900 as a spare part. An authorised LG service centre visit typically charges ₹500–₹1,500 as a call-out fee plus parts.

Is the PE error covered under LG’s warranty?

Manufacturing defects such as a faulty pressure sensor from the factory are covered under LG’s standard 2-year warranty. Physical damage or misuse is typically not covered. For out-of-warranty machines, authorised service is recommended for quality-matched parts.

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