LG Washer Error Code PE

LG Washer Error Code: PE — What It Means

The LG washer error code “PE” (often displayed as P E) signals a pressure or water-level sensing problem. This code means the washer’s control board isn’t receiving a valid signal from the pressure (air) sensor or that the sensor’s associated hose/wiring is obstructed, damaged, or disconnected. When the machine cannot determine water level correctly it may refuse to start cycles, stop mid-cycle, overfill, underfill, or display other odd behavior. Common user impacts include longer or incomplete cycles, clothes left soaking or not rinsed properly, loud or abnormal noises if the machine keeps trying to refill or drain, and in rare cases a risk of overflowing or leaks if the inlet or sensing system fails to stop filling.

Common Causes

• Faulty pressure (water level) sensor / air pressure switch.
• Clogged, kinked, pinched, or detached pressure hose between the tub and sensor.
• Loose or corroded wiring connectors or broken harness to the sensor.
• Malfunctioning main control board (faulty input reading or relay control).
• Problems with the water inlet valve causing unusual fill behavior that confuses the sensor.
• Obstructed drain pump or drain line causing erroneous pressure changes.
• Excessive suds (overuse of detergent) altering pressure readings.
• Physical damage to the tub or chassis that allows air leaks affecting the pressure tube seal.

Troubleshooting Steps

1. Power cycle the washer: unplug for 1–2 minutes or flip the breaker, then restart to clear temporary faults.
2. Run LG diagnostic/self-test mode to capture error history and test the pressure sensor reading (refer to your model’s tech sheet for the test sequence).
3. Inspect the pressure hose: remove the front or rear panel as required and check the small rubber hose from the tub to the pressure sensor for kinks, blockages, cracks, or disconnections. Clear any debris and re-seat securely.
4. Check wiring and connectors: look for loose pins, corrosion, or damaged insulation at the pressure sensor and the control board. Re-seat connectors and secure harness clips.
5. Test the pressure sensor: use a multimeter to check continuity/resistance as specified in the service manual, or gently blow into the sensor tubing while observing diagnostic readings—noises or no change can indicate failure.
6. Examine the drain pump and drain hose: remove lint and obstructions; a blocked drain can create unusual pressure dynamics or error flags.
7. Reduce suds: ensure you are using high-efficiency detergent and the correct amount—excessive suds can trigger false pressure errors.
8. Swap or replace the pressure hose and sensor: if inspection and basic tests show failure, replace the hose and/or sensor with OEM parts; inexpensive hoses are often the first fix.
9. Check the water inlet valve and valves’ solenoids: if the machine is overfilling or cycling oddly, a defective inlet valve can be part of the issue—test or replace as needed.
10. If errors persist after replacing sensor/hoses, inspect or replace the main control board or consult an authorized technician—intermittent control board faults can mimic sensor failure.

Maintenance / Prevention Tips

• Regularly inspect the small pressure (air) hose for kinks or wear—check every 6 months.
• Use high-efficiency (HE) detergent in recommended amounts to prevent excess suds.
• Keep the washer level and balanced; an off-level machine stresses components and hoses.
• Clean the washer’s drain pump filter and hoses periodically to avoid clogs that affect pressure readings.
• Avoid overloading the washer—large unbalanced loads can cause erratic pressure changes.
• Use a surge protector or dedicated circuit to reduce the risk of control board damage from power spikes.
• When moving the washer, double-check that internal hoses and connectors are secure afterward.
• Replace worn or cracked hoses promptly—rubber hoses deteriorate with age and heat.
• Keep the washer’s exterior vents and openings free of lint and debris to maintain proper airflow around sensors.
• Schedule professional maintenance if you notice recurring errors or unusual noises—early intervention prevents bigger failures.
• Rinse items that shed excessive lint before washing to reduce debris buildup in hoses and pumps.
• Follow LG’s recommended cleaning cycles and run a monthly tub clean to reduce residue buildup.
• Check door and tub seals for damage that could allow air leaks near the pressure hose connection.
• Use OEM replacement parts when replacing sensors or hoses to ensure correct specifications and fit.
• Document error codes and the circumstances when they occur (load type, cycle, detergent) to help technicians diagnose issues faster.

FAQs

Q: Can I reset the PE code myself?

A: Yes—try unplugging the washer or flipping the breaker for 1–2 minutes to reset. If the code returns, follow the troubleshooting steps above or run the washer’s diagnostic mode.

Q: Is it safe to keep using the washer with a PE code?

A: Not recommended. While occasional resets may let a cycle run, persistent PE faults can lead to overfilling, poor washing, or leaks. Stop using the machine until you identify and fix the cause.

Q: How much does it cost to fix a PE code?

A: Costs vary. Replacing a pressure hose or sensor is typically low to moderate in cost (parts + labor). If the main control board or inlet valve needs replacement, costs can be higher. Labor rates and part prices vary by region and model.

Q: Can I replace the pressure sensor myself?

A: If you’re comfortable with basic appliance repair (unplugging, accessing the sensor, disconnecting connectors, swapping parts), yes. Always unplug the washer first and follow model-specific guides. If unsure, hire a pro to avoid electrical or water damage.

Q: Which LG parts should I check first?

A: Start with the pressure hose and sensor since they’re the most common, least expensive, and easiest to access. Then check wiring, drain pump, inlet valve, and control board if needed.

Conclusion & Safety Notice

A PE error on an LG washer usually points to a pressure-sensing issue that can often be fixed by checking the pressure hose, cleaning drains, or replacing a sensor. However, because this code affects water-level control and can lead to overfilling or leaks, it’s important to approach diagnosis safely: always unplug the appliance before inspecting internal components and turn off the water supply when working on valves or hoses. If you’re not confident with electrical or mechanical repairs, or if diagnostic tests point to a faulty control board or an intermittent fault, contact an authorized LG service technician.

If the error returns after basic troubleshooting or if you detect water leaks, persistent flooding, or electrical smells, stop using the washer and call a professional. Proper repairs protect your home and extend the life of your appliance.