The PE error code on an LG washer indicates a fault with the water level sensor (pressure sensor). The machine cannot accurately detect how much water is in the drum, which prevents it from completing a wash cycle safely. The most common causes are a kinked or disconnected pressure sensor hose, a clogged pressure sensor port, or a faulty water level sensor. Start by inspecting the pressure hose — it's free to check and resolves the error in many cases. If the hose is intact and clear, the sensor itself likely needs to be replaced by a technician.
What the PE Code Means
The LG washer PE error code is a pressure sensor (water level sensor) fault. It appears when the control board cannot receive a valid signal from the pressure sensor that monitors the water level inside the drum. LG's control board uses this sensor to determine how much water to let in and when to stop filling — without accurate readings, the machine halts the cycle and displays PE to prevent overfilling or running dry.
When this error appears, the washer may have stopped mid-fill, with either too much water, too little, or no water in the drum. The machine protects itself — and your laundry room floor — by refusing to continue until the sensor issue is resolved.
The good news: PE is often caused by a simple mechanical problem with the pressure hose rather than a failed electronic component. A kinked, disconnected, or clogged pressure hose is the culprit in a significant number of service calls. Work through the steps below before assuming a sensor replacement is needed.
Common Causes — Most Likely First
How to Fix the PE Error — Step by Step
Turn off and unplug the washer
Press the power button to end the cycle and unplug the washer from the wall outlet. This clears the active error and removes power from all components before you begin inspecting internal parts.
Perform a basic reset
With the washer unplugged, hold the power button for 5 seconds to discharge residual power, then wait a full minute before plugging back in. On some LG models, a transient sensor glitch will clear with a proper reset. Run a quick cycle to see if PE returns before going further.
Access the pressure sensor and its hose
The pressure sensor is typically located behind the top panel or inside the cabinet near the upper-rear of the machine. On most LG front-loaders, removing three to four screws from the rear of the top panel allows it to slide back and lift off, exposing the sensor and its connected hose. Consult your model's service diagram if unsure of the exact location.
Inspect the pressure sensor hose for kinks or disconnection
Trace the small rubber hose from the sensor down to where it connects to the tub. Check both ends are firmly seated. Straighten any kinks along its length. If the hose has cracked, split, or hardened, it needs replacement — a compatible hose costs only a few dollars from an appliance parts supplier.
Clean the pressure hose and tub port
Disconnect the hose from both the sensor and the tub port. Blow gently through it to check for airflow blockage. Rinse the hose under running water and use a thin brush or pipe cleaner to clear any residue from inside. Use a cotton swab to clean out the tub pressure port as well.
Check the wiring connector at the pressure sensor
With the hose clean and reconnected, inspect the electrical connector plugged into the sensor. Push it firmly to ensure a solid connection. Look for any corroded, bent, or broken pins. If the connector is damaged, it will need to be repaired or the wiring harness replaced.
Reassemble and run a test cycle
Replace the top panel, plug the washer back in, and run a Normal or Quick Wash cycle. Watch the fill phase closely: the machine should fill, then pause as the sensor reads the water level. If the cycle runs through without PE, the hose or connection was the issue.
If the code returns — the sensor or control board has failed
If PE returns after cleaning the hose and verifying all connections, the pressure sensor itself has most likely failed electronically. Replacing the water level sensor is a straightforward part swap that a technician can perform in a single visit. A control board fault is possible but far less common and requires professional diagnosis.
When to Call a Technician
Many PE errors clear after cleaning the pressure hose. Book a professional LG washer repair if:
- PE returns immediately after you've confirmed the pressure hose is clear, properly connected, and undamaged
- The washer is overfilling — water approaching or reaching the door seal — which indicates the sensor has lost all ability to regulate fill level
- The wiring harness to the sensor shows visible damage, corrosion, or burnt connectors
- You've replaced the pressure sensor and PE still persists, suggesting a control board fault
- The washer won't fill at all and PE appears immediately when the cycle starts
Repair Cost Expectations
If You Fix It Yourself
Water Level Sensor Replacement
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Frequently Asked Questions
Can I still use my LG washer with a PE error?
No. When PE appears, the washer has stopped because it cannot reliably measure the water level in the drum. Attempting to run another cycle risks the machine overfilling — potentially causing a flood — or running with too little water, which stresses the motor and doesn't clean your laundry. Resolve the sensor issue first, then restart the cycle.
Will resetting my LG washer clear the PE error?
A reset — unplugging for 60 seconds and plugging back in — may temporarily clear the displayed code if the error was triggered by a minor glitch. However, if the pressure hose is physically kinked, disconnected, or the sensor has failed, PE will return as soon as the next fill cycle begins. Fix the root cause first, then reset.
How long does it take to fix LG error code PE?
Inspecting and cleaning the pressure hose takes about 20 to 45 minutes once you have access to the sensor compartment. If the water level sensor needs to be replaced, a Promix technician can typically complete the repair in a single same-day visit of one to two hours, as we stock common LG sensor parts on the truck.
Is LG error code PE covered under warranty?
LG's standard one-year limited warranty covers defects in materials and workmanship. If PE is caused by a faulty water level sensor that failed due to a manufacturing defect and your washer is within the warranty period, LG should cover the repair. If the cause is a clogged pressure hose from normal use or user-related damage, that is typically not covered. Check your purchase date and contact LG directly if you believe a defect is involved.
Why does my LG washer show PE only on certain cycle types?
An intermittent PE that appears on some cycles but not others usually points to a pressure hose that is partially blocked or has a very small leak — enough to cause unreliable readings under varying water levels. Heavily sudsy cycles (like Hot or Heavy duty) can also push foam into the pressure port and trigger PE intermittently. Clean the hose first; in most intermittent cases, that resolves it.
My LG washer is overfilling and shows PE — is that dangerous?
Yes, treat this as urgent. If the washer is filling beyond the normal level and displaying PE, the pressure sensor has lost the ability to signal the control board to stop the water inlet valve. This can lead to flooding. Unplug the machine immediately and shut off the water supply valves behind the washer. Do not use it again until the sensor or inlet valve is repaired by a technician.