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

Field note: PE is a no-fill / slow-fill complaint. The first test is household water, not a valve coil. On LG Washing Machines: fully open both taps, unkink the hoses, clean the inlet screens. A clogged screen or a saddle valve that cannot keep up trips this before the inlet valve itself fails.

What this code is not

• Not a drain-pump failure.
• Not solved by a new dispenser if both inlet screens are packed with mineral grit.
• If the house supply is weak, the valve is innocent.

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.

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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