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PE

LG Washing Machine

Severity: Moderate

Source: OnlyErrorCodes.com — Every error code. One place.

LG Washer PE Error — Water Level Sensor Fix

What it means

LG washer PE error means the water level sensor (pressure sensor) is malfunctioning — LG's 'Water level sensor is malfunctional' code.
The control board can't trust the water level reading, so it stops the cycle to prevent over-fill or under-fill.

Affected Models

  • LG Front Load Washer
  • LG Top Load Washer
  • LG WashTower (combined washer + dryer)
  • LG TurboWash Washer
  • LG TwinWash Washer

Common Causes

  • Pressure sensor hose detached at one end
  • Pressure hose pinched, kinked, or split
  • Pressure sensor (water level switch) faulty
  • Wiring loose between sensor and main control board
  • Detergent / water residue trapped in pressure hose

How to Fix It

  1. Power-cycle the washer.

    Unplug for 60 seconds, plug back in.
    One-off sensor read glitches sometimes clear on a clean reboot.
    If PE returns immediately on the next cycle, the issue is hardware.

  2. Find and inspect the pressure hose.

    Remove the back panel of the washer.
    Look for a small clear plastic tube running from the bottom of the outer tub up to the pressure sensor (a small cylindrical part).
    Confirm both ends are firmly connected and the tube isn't pinched, split, or full of trapped water.

  3. Blow out the pressure hose.

    Disconnect the hose at the sensor end.
    Gently blow into the hose to clear any trapped water or detergent gunk.
    Reconnect.
    Detergent residue in the hose throws the sensor reading out and triggers PE.

  4. Replace the pressure sensor.

    If the hose is intact and clean but PE persists, the sensor itself has failed.
    Replacement is a 30-minute job with the back open.
    Order the matching part for your LG washer model.

When to Call a Professional

Pressure hose checks are owner-doable; sensor replacement is technician-level.
The sensor itself is inexpensive (£10–£20) but accessing it usually needs the back panel off.

Frequently Asked Questions

Will my LG washer flood if I keep using it with the PE error?

PE specifically stops the cycle to prevent flooding — so no, the washer is protecting itself by refusing to run.
If you ignore PE and somehow force a cycle (or if the sensor failed in a way that doesn't stop the cycle), the inlet valve can keep filling indefinitely because the control board has no reliable water-level reading.
That's a real flood risk.
Don't bypass PE; fix the pressure hose or sensor before using the washer again.