The PE error on your LG washer means the machine can’t read the water pressure sensor, which measures water level inside the drum. To fix it, start by checking the water supply and hoses for blockages or leaks, then inspect and clean the sensor and its hose. If the error continues, replacing the water pressure sensor should solve the problem.
What does the PE error mean on your LG washer?
The PE error stands for "Pressure Error" and refers to an issue with the water pressure sensor. This sensor monitors water level by measuring pressure in a small hose connected to the tub. When the washer detects no signal or an abnormal signal from this sensor, it shows the PE error and pauses the cycle to avoid damage or incorrect operation. The washer won’t fill or spin until it confirms the water level is accurate.
Why does the water pressure sensor cause errors?
The sensor reads water level by sensing pressure changes in its hose. Common causes of the PE error include blockages or clogs in the hose that prevent pressure from reaching the sensor, cracks or leaks in the hose that cause pressure loss, or sensor malfunction from electrical or mechanical failure. Dirt, mineral buildup, or debris inside the hose or sensor can also cause false readings that trigger the error.
How to safely troubleshoot the PE error starting with simple checks
Begin with these steps before opening the washer or replacing parts: 1. Ensure water supply valves are fully open and your home water pressure is normal. 2. Check inlet hoses for kinks, pinches, or blockages and confirm they are tightly connected. 3. Inspect the drain hose to make sure it’s not clogged or positioned incorrectly, as this can affect water levels. 4. Unplug the washer before proceeding with any internal inspections to avoid electrical hazards. These checks often fix the problem or eliminate simple causes before you inspect the sensor.
How to inspect, clean, and test the water pressure sensor and its hose
- Unplug the washer. 2. Locate the water pressure sensor inside the cabinet near the tub. 3. Detach the hose from the sensor and look for blockages, cracks, or buildup. Blow through the hose to check if air passes freely; if it doesn’t, clean or replace the hose. 4. Disconnect electrical connectors and remove any screws to take out the sensor. 5. Clean the sensor gently with a soft cloth and mild detergent if it has dirt or mineral deposits. Avoid harsh chemicals. 6. Test the sensor by blowing gently into its pressure port; you should feel resistance or hear a slight clicking. 7. Reattach the hose and sensor securely. 8. Plug in the washer and run a cycle to see if the PE error clears.
When and how to replace the water pressure sensor
If cleaning the hose and sensor doesn’t fix the error, the sensor may be faulty. Signs include no response when blowing into it, visible damage, or persistent PE errors after troubleshooting. To replace it: 1. Purchase the correct sensor for your LG washer model. 2. Unplug the washer and remove the cabinet or panel to access the sensor. 3. Disconnect the electrical connector and remove the hose from the old sensor. 4. Unscrew or unclip the sensor from its mount. 5. Install the new sensor by reversing these steps: mount it, connect the hose, and attach the electrical connector. 6. Replace the panel, plug in the washer, and run a test cycle to confirm the fix.
How to verify that the PE error is resolved and prevent future issues
After repairs, start a normal wash cycle and watch for the PE error. It should not appear, and the machine should fill water and proceed normally. If your model has a diagnostic or test mode, run it to check all sensors. To prevent future errors, clean the pressure hose and sensor regularly, avoid harsh detergents that cause buildup, and ensure consistent water supply. Keeping these parts clear and clean helps maintain accurate water level readings and avoids the PE error returning.
Conclusion
If the PE error continues after these steps, consider contacting an appliance technician. However, most homeowners can fix this by checking the water supply, cleaning or replacing the pressure sensor and hose. Regular maintenance helps keep your LG washer running without unexpected errors.
Frequently Asked Questions
Can I use any water pressure sensor replacement part for my LG washer?
No. You need a sensor that matches your LG washer’s model to ensure it fits and works correctly.
Is it safe to run the washer with the PE error showing?
No. The washer stops to prevent damage or improper washing. Fix the error before using it again.
How often should I clean the water pressure sensor and hose?
Cleaning once a year or whenever you notice washing issues or error codes usually keeps the sensor working well.