LG Washing Machine Error Code PE — How to Fix (Water level sensor (pressure switch) error)

If you’re seeing the PE error code on your LG washing machine, it can be frustrating and confusing. This error code indicates a problem with the water level sensor, also known as the pressure switch. Don’t worry; in this comprehensive guide, we’ll walk you through what the PE error code means, how to diagnose the issue, and steps to fix it.

What LG Washing Machine Error PE Actually Means

The PE error code on your LG washing machine is related to the water level sensor or pressure switch. This sensor is responsible for detecting the water level in the tub and sending signals to the control board to adjust the wash cycle accordingly. When the pressure switch fails to detect the correct water level, the washing machine displays the PE error code.

The water level sensor is typically located behind the washer’s rear panel and consists of a small switch and a tube that connects to the tub. The sensor works by detecting changes in air pressure that correspond to the water level in the tub. If the sensor or its wiring is faulty, it can cause the PE error code to appear.

Safety Precautions

In terms of safety, it’s generally safe to keep using the washing machine with the PE error code, but it’s not recommended. The error code indicates a problem that can cause the washing machine to malfunction, potentially leading to poor wash performance, water damage, or even electrical issues.

Quick Diagnostic Checklist (use before calling anyone)

Before calling a professional or spending money on repairs, try these quick diagnostic checks:

• Power cycle: Unplug the washing machine from the power outlet, wait for 5-10 minutes, and plug it back in. This simple reset can sometimes resolve the issue.
• Check the water supply: Ensure that the water supply valves are fully open and that the water pressure is adequate.
• Inspect the drain hose: Verify that the drain hose is not kinked or clogged, as this can cause issues with the water level sensor.
• Check for loose connections: Verify that all wires and connections to the water level sensor are secure.

Root Causes (Ranked by Likelihood)

Here are the common causes of the PE error code on LG washing machines, ranked by likelihood:

1. Faulty Water Level Sensor

• Description: The water level sensor is the most common cause of the PE error code. Over time, the sensor can become faulty or damaged, leading to incorrect readings and the PE error code.
• Solution: Replace the water level sensor with a new one. The cost of a replacement sensor can range from $20 to $50, depending on the model and brand.

2. Wiring Issues

• Description: Corrosion, damage, or loose connections in the wiring can cause the PE error code.
• Solution: Inspect the wiring and connections, and repair or replace them as needed. The cost of wiring repairs can range from $10 to $50.

3. Clogged or Kinked Drain Hose

• Description: A clogged or kinked drain hose can cause issues with the water level sensor, leading to the PE error code.
• Solution: Inspect the drain hose and clear any blockages or kinks. The cost of a new drain hose can range from $10 to $30.

4. Control Board Issues

• Description: In some cases, the control board can be faulty, causing the PE error code.
• Solution: Replace the control board with a new one. The cost of a replacement control board can range from $50 to $150.

Model-Specific Notes

• 2026 LG Washing Machine Models: If you have a 2026 LG washing machine model, ensure that your firmware is up to date. LG regularly releases firmware updates to fix issues and improve performance. You can check for updates on the LG website or through the LG SmartThinQ app.
• LG Washing Machine Models with Steam Function: If you have an LG washing machine model with a steam function, you may need to take extra precautions when replacing the water level sensor. Consult your user manual or contact LG support for specific instructions.

Cost Estimates for Repairs

Here are estimated costs for repairs:

• Water level sensor replacement: $20-$50
• Wiring repairs: $10-$50
• Drain hose replacement: $10-$30
• Control board replacement: $50-$150

Common Misdiagnoses

• Misdiagnosing the issue as a drain pump problem: The PE error code is often misdiagnosed as a drain pump issue. However, the drain pump is not directly related to the water level sensor.
• Misdiagnosing the issue as a control board problem: While the control board can be faulty, it’s not the most common cause of the PE error code.

Steps to Fix the PE Error Code

Step 1: Reset the Washing Machine

Begin by unplugging the washing machine from the power outlet. Next, locate the reset button on the control panel, usually marked with a small diagram of a circle with an arrow. Press and hold the reset button for 5-10 seconds. Release the button and plug the washing machine back in. This may resolve the issue, but be careful if the error persists.

Step 2: Check the Water Level Sensor

Locate the water level sensor (pressure switch) behind the washing machine’s front panel. Remove the Torx screws (T20) to access the sensor. Use a multimeter to measure the resistance between the sensor’s terminals. A reading of around 1-2 kΩ indicates a functioning sensor. If the reading is significantly different, replace the sensor.

Step 3: Inspect the Sensor’s Wiring

Inspect the wiring connected to the water level sensor for any signs of damage, corrosion, or loose connections. Check for any frayed wires or broken insulation. If you find any damage, replace the wiring harness.

Step 4: Check the Sensor’s Mounting

Verify that the water level sensor is securely mounted to the washing machine’s frame. Check for any signs of looseness or movement. If the sensor is loose, tighten the mounting screws or replace the mounting bracket if necessary.

Step 5: Replace the Water Level Sensor

If the sensor is faulty or damaged, replace it with a new one. Consult the user manual or online resources for specific instructions on replacing the sensor. Ensure the new sensor is properly connected to the wiring harness and securely mounted to the washing machine’s frame.

When to Call a Professional

If you’re unsure about any part of the process or if the error persists after attempting the above steps, you should call a professional appliance repair technician to diagnose and fix the issue. A professional technician can help you:

• Diagnose the issue: A professional technician can use specialized tools and equipment to diagnose the issue and determine the root cause.
• Repair or replace the water level sensor: A professional technician can repair or replace the water level sensor, ensuring that it’s properly connected and functioning correctly.
• Perform additional repairs: A professional technician can perform additional repairs, such as replacing the control board or wiring harness, if necessary.

The cost of hiring a professional appliance repair technician can range from $50 to $150, depending on the location, technician, and complexity of the repair.

Conclusion

The PE error code on your LG washing machine can be frustrating, but it’s often easy to diagnose and fix. By following the steps outlined in this guide, you can determine the root cause of the issue and make the necessary repairs. If you’re unsure or uncomfortable with DIY repairs, don’t hesitate to call a professional appliance repair technician for assistance.

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