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 worrisome. This error code indicates a problem with the water level sensor, also known as the pressure switch. 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 Code 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 control the wash cycle. When the pressure switch fails to detect the correct water level, the washing machine displays the PE error code.

The water level sensor is usually located behind the washer’s top panel and is connected to the tub and the control board. It’s a critical component that ensures the washing machine doesn’t overfill or underfill with water. If the sensor is faulty or damaged, it can cause issues with the wash cycle, leading to the PE error code.

Fast Troubleshooting Steps (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 the water supply valves are fully open and the water pressure is adequate.
• Inspect the drain hose: Check the drain hose for kinks, blockages, or improper installation.
• Verify the washer’s level: Ensure the washing machine is properly leveled and balanced.

Why This Error Appears (Top Causes)

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 (pressure switch) is faulty or damaged, causing incorrect readings.
• How to verify: Use a multimeter to test the sensor’s resistance. A faulty sensor will show abnormal resistance readings.
• Fix difficulty: Medium
• Cost: $20-$50 (part) + labor

2. Wiring Issues

• Description: The wiring connected to the water level sensor is damaged, loose, or corroded.
• How to verify: Inspect the wiring for signs of damage, corrosion, or wear. Use a multimeter to test for continuity.
• Fix difficulty: Easy to Medium
• Cost: $0-$20 (parts) + labor

3. Clogged or Blocked Pressure Hose

• Description: The pressure hose connected to the water level sensor is clogged or blocked.
• How to verify: Inspect the pressure hose for kinks, blockages, or damage. Clean or replace the hose if necessary.
• Fix difficulty: Easy
• Cost: $0-$10 (parts) + labor

4. Control Board Issues

• Description: The control board is faulty or damaged, causing incorrect signals to the water level sensor.
• How to verify: Use a multimeter to test the control board’s voltage output. A faulty control board may require replacement.
• Fix difficulty: High
• Cost: $100-$200 (part) + labor

5. Other Causes

• Description: Other issues, such as a faulty drain pump or clogged drain filter, can also cause the PE error code.
• How to verify: Inspect the drain pump and filter for blockages or damage. Clean or replace if necessary.
• Fix difficulty: Medium to High
• Cost: $20-$100 (parts) + labor

Repair Walkthrough (Most Common Fix)

The most common cause of the PE error code is a faulty water level sensor. Here’s a step-by-step guide to replace the sensor:

Tools needed: Multimeter (digital), Torx screwdriver (T20), Phillips screwdriver (#2), Wire connectors (if needed)

Time estimate: 30-60 minutes

Safety warnings:

• Unplug the washing machine from the power outlet before starting the repair.
• Wear protective gloves and safety glasses.

Steps:

1. Locate the water level sensor: Find the water level sensor (pressure switch) behind the washer’s top panel.
2. Disconnect the wiring: Carefully disconnect the wiring connected to the sensor.
3. Remove the sensor: Use a Torx screwdriver (T20) to remove the screws holding the sensor in place.
4. Remove the old sensor: Gently pull out the old sensor from its mounting bracket.
5. Install the new sensor: Mount the new sensor to the bracket and secure it with screws.
6. Reconnect the wiring: Connect the wiring to the new sensor, ensuring secure connections.
7. Test the sensor: Use a multimeter to test the sensor’s resistance and ensure it’s working correctly.

Your Model’s Unique Considerations

Some LG washing machine models may have variations in the water level sensor or pressure switch. Here are some model-specific differences:

• LG WM3997HWA: This model uses a different type of pressure switch, which may require a specific replacement part.
• LG WM3997HWA (2015 and later): These models have a redesigned water level sensor, which may require a different repair approach.

Parts & Service Cost Overview

Here’s a breakdown of the estimated repair costs for the PE error code:

Stop This Problem Before It Starts

To prevent the PE error code from occurring in the future, follow these maintenance tips:

• Regularly clean the drain filter: Clean the drain filter every 1-2 months to prevent blockages.
• Check the water supply: Ensure the water supply valves are fully open and the water pressure is adequate.
• Inspect the drain hose: Regularly inspect the drain hose for kinks, blockages, or improper installation.

When Home Fixes Won’t Cut It

If you’re not comfortable with DIY repairs or if the issue persists after trying the above steps, it’s time to call a professional. Here are some scenarios where you should seek help:

• You’re unsure about the diagnosis: If you’re not sure what’s causing the PE error code, it’s best to consult a professional.
• You’ve tried DIY repairs but the issue persists: If you’ve tried the above steps but the issue persists, it’s likely that the problem requires professional attention.
• You’re not comfortable with electrical work: If you’re not comfortable working with electrical components, it’s best to hire a professional.

You can find a qualified technician by:

• Contacting LG customer support: Reach out to LG’s customer support for recommendations on authorized service providers.
• Checking online directories: Look up online directories like Yelp or Angie’s List for reviews and ratings of local appliance repair technicians.

Frequently Asked Questions

Here are some common questions and answers related to the PE error code on LG washing machines:

• Q: What does the PE error code mean on my LG washing machine? A: The PE error code indicates a problem with the water level sensor or pressure switch.
• Q: Can I reset the PE error code? A: Sometimes, a simple power cycle can reset the error code. However, if the issue persists, you’ll need to diagnose and fix the underlying cause.
• Q: How much does it cost to replace the water level sensor? A: The cost to replace the water level sensor can range from $20 to $50, depending on the part and labor costs.
• Q: Can I fix the PE error code myself? A: Yes, you can try to fix the PE error code yourself if you’re comfortable with DIY repairs and have the necessary tools and expertise.
• Q: What if I’ve tried everything and the PE error code persists? A: If you’ve tried all the above steps and the issue persists, it’s likely that the problem requires professional attention. Contact LG customer support or a qualified technician for further assistance.

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