What Does an Error Code on My LG Washing Machine Display Mean?
Press and hold the Power button for 5 seconds to fully reset the machine, then restart a cycle — this clears temporary electronic faults and resolves the error code in many cases (takes about 3 minutes).
Fault description
When your LG washing machine shows an error code on its display, it means the onboard control system has detected something outside its normal operating range and is alerting you before the problem gets worse. The machine may stop mid-cycle, refuse to start, or complete a partial cycle and then pause. This is a protective feature, not a malfunction in itself — the code is the machine's way of pointing you toward the underlying issue.
Common codes on LG washing machines include PE (pressure sensor error), EE (EEPROM memory error), PS (door lock or power supply issue), and AE (communication error between the control boards). Each code relates to a specific system, but the starting point for diagnosis is almost always the same: identify the code, rule out simple causes first, and work methodically from there. Many of these faults can be resolved at home without specialist tools.
Causes
- Temporary electronic glitch in the control board — A brief power fluctuation or software hiccup can cause the control board to log a fault code even when no physical component has failed. This is one of the most common reasons an error code appears, and a reset often clears it immediately.
- Faulty or blocked pressure sensor (PE code) — The pressure sensor monitors the water level inside the drum. If the small plastic hose connecting the sensor to the drum becomes kinked, blocked with detergent residue, or the sensor itself fails, the machine cannot accurately read the water level and displays a PE error.
- Door lock or latch failure (PS code) — The PS code typically points to a problem with the door interlock mechanism — either the latch isn't engaging fully, or the lock assembly has failed electrically. The machine will not run a cycle if it cannot confirm the door is securely closed.
- Communication fault between control boards (AE code) — LG washing machines use two or more circuit boards that communicate with each other. A wiring harness that has worked loose, corroded connector pins, or a failing secondary board can break this communication and trigger an AE error.
- EEPROM memory error (EE code) — The EEPROM chip on the main control board stores the machine's settings and cycle data. If this memory becomes corrupted — often after a power surge — the machine displays an EE code and may refuse to operate until the board is replaced or reprogrammed.
- Damaged or disconnected wiring harness — Vibration over time can loosen wire connectors throughout the machine. A loose connection to the pressure sensor, door lock, or control board can mimic a component failure and trigger any of the above error codes.
Step-by-Step Fix
- 1
Note the exact error code displayed
Before doing anything else, write down the code shown on the display. If the machine is mid-cycle and the code has appeared, do not open the door until the drum has stopped rotating. Knowing the exact code — PE, EE, PS, AE, or another — will help you target the right component and avoid unnecessary checks.
- 2
Perform a hard reset
Switch the machine off at the power button, then unplug it from the wall socket. Wait a full 5 minutes — this allows the capacitors on the control board to discharge completely. Plug back in, power on, and attempt a new cycle. A significant proportion of error codes are caused by temporary electronic faults and will not return after a proper reset.
- 3
Check the door and door latch (relevant to PS code)
Open and firmly close the door, making sure no clothing is caught in the seal. Inspect the plastic latch on the door and the strike plate on the machine body for visible cracks or misalignment. If the door feels loose or the latch does not click positively into place, the interlock assembly likely needs replacing.
- 4
Inspect the pressure sensor hose (relevant to PE code)
The pressure sensor is usually located at the top of the machine and connected to the drum by a thin rubber or plastic hose. Unplug the machine, remove the top panel (typically two screws at the rear), and trace the hose from the sensor down to the drum. Look for kinks, cracks, or a build-up of soapy residue blocking the tube. Gently blow through the hose to confirm it is clear.
- 5
Check all visible wiring connectors
With the machine unplugged and the top or rear panel removed, visually inspect the wiring harnesses connected to the control board, door lock, and pressure sensor. Press each connector firmly to reseat it. Look for any wires that appear burnt, corroded, or have pulled free from their terminals. Reattach any loose connectors and replace the panel before testing.
- 6
Run a diagnostic cycle
LG washing machines have a built-in diagnostic mode. On most models, you can enter it by pressing and holding the Spin Speed and Soil Level buttons simultaneously for 3 seconds with the machine powered on. The machine will cycle through its components and display any active fault codes. Refer to your model's user manual for the exact button combination, as this varies between series.
- 7
Test or replace the identified component
If the diagnostic mode confirms a specific component — such as the pressure sensor, door lock assembly, or a control board — source the correct replacement part using your machine's model number (found on the label inside the door frame). Pressure sensors and door locks are straightforward to swap at home. Control board replacement is more involved but still achievable with basic tools and the correct part.
When to call a service technician
If the error code returns immediately after a full reset, or if the machine shows an EE code that persists after power cycling, the main control board's EEPROM may be corrupted or the board itself may have failed. Replacing a control board requires careful handling of static-sensitive components and precise connector routing — if you are not confident working inside the machine, this is the point to contact a service technician.
You should also call a service technician if you notice any burning smell, scorch marks on the wiring or board, or if the machine trips your household circuit breaker when switched on. These signs indicate an electrical fault that goes beyond a simple component swap and could pose a safety risk if left unaddressed.
Prevention
The parts most commonly replaced when resolving LG washing machine error codes are the pressure sensor (PE code), the door lock interlock assembly (PS code), and the main control board (EE and AE codes). Having the correct model number to hand when ordering parts ensures compatibility — you will find it on a sticker inside the door aperture. Using a surge-protected extension lead can also help protect the control board from future power fluctuation damage.
To reduce the likelihood of error codes appearing over time, clean the detergent drawer and drum monthly to prevent residue build-up in the pressure sensor hose, and avoid overloading the drum, which puts stress on the door latch and motor circuits.
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Frequently Asked Questions
Will unplugging my LG washing machine reset the error code?
Yes, unplugging the machine for at least 5 minutes performs a hard reset that clears temporary fault codes stored in the control board's memory. However, if the underlying cause — such as a faulty sensor or broken door lock — has not been fixed, the code will return once you run another cycle.
What does the PE error code mean on an LG washing machine?
PE stands for Pressure sensor Error. It means the machine cannot accurately detect the water level inside the drum. The most common causes are a kinked or blocked pressure sensor hose, or a failed pressure sensor. Clearing the hose or replacing the sensor usually resolves it.
Is it safe to keep using my LG washing machine when an error code is showing?
Generally, no. Error codes are designed to stop the machine from operating in a potentially damaging or unsafe condition. Running the machine while ignoring a fault code can worsen the underlying problem and may cause water leaks, electrical issues, or damage to the drum and motor.
How do I find the model number on my LG washing machine?
The model number is printed on a label inside the door aperture — open the door and look around the inner rim of the machine body. It typically starts with letters such as F, WM, or FH followed by a string of numbers and letters. You will need this number to order the correct replacement parts.
Can a power cut cause an error code to appear on my LG washing machine?
Yes. A sudden power cut or voltage spike can corrupt the temporary memory on the control board and trigger codes such as EE or AE. In most cases a full reset — unplugging for 5 minutes — will clear the code. If the EE code persists after multiple resets, the EEPROM chip or control board may need to be replaced.