Error Code OE

Drain Error

What This Means

Not fully drained within 10 minutes; Kinked or clogged drain hose; Frozen drain hose; Foreign objects clogging drain pump filter; Foreign objects caught in pump impeller; Loose or disconnected connectors at main PCB and drain pump; Water level frequency above 250 (air dome/pressure hose clogged); Drain pump motor resistance out of range; Main PWB not supplying 120 VAC ±5% to drain pump connector NA4-1,4

How to Fix

1. 1

   Confirm OE is displayed

2. 2

   Check connectors at main PCB and drain pump for looseness or disconnection — reconnect or repair

3. 3

   Press Delay Wash and Soil simultaneously — check if water level frequency is below 250

4. 4

   If yes (water level <250): check air dome and pressure hose for clogging; check pressure switch

5. 5

   If connectors OK: measure drain pump motor resistance between terminals 1 and 2 — should be 10–20 Ω; if out of range replace drain pump assembly

6. 6

   Check voltage at main PCB connector NA4-1,4 — should be 120 VAC ±5%; if incorrect replace Main PWB assembly

7. 7

   To activate drain pump for testing: turn on washer, press Spin Only (low speed), press Start/Pause

8. 8

   Always check external causes: kinked/clogged drain hose, frozen hose, clogged pump filter, debris in impeller

This Error Applies To

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