Error Code PE

Pressure Sensor Error

What This Means

Pressure sensor assembly out of order; Water level frequency consistently below 10 kHz or over 30 kHz; Connector to pressure sensor disconnected or disassembled; Pressure sensor resistance out of range (pin 1 to pin 3: not 21–23 Ω ±10%); Air chamber and tube clogged

How to Fix

1. 1

   Confirm PE is displayed — note: if PE error not resolved within 20 seconds power turns off automatically and code blinks

2. 2

   Check connector to pressure sensor — reconnect or repair if disconnected

3. 3

   Measure resistance of pressure sensor (pin 1 to pin 3) — should be 21–23 Ω ±10%; if out of range replace pressure switch

4. 4

   Check if air chamber and tube are clogged — fix and remove foreign material if clogged

5. 5

   If all checks pass: replace Main PWB assembly

This Error Applies To

LG WM4000H Series Washers (2023) (2023–present)