Error Code OE

Drain Error — machine has not fully drained within 10 minutes.

What This Means

Drain pump connectors loose or disconnected at main PCB or drain pump; Water level above 250 (frequency reading) indicating blocked drain path; Air dome or pressure hose clogged; Pressure switch defective; Drain pump motor resistance out of range (should be 10-20 Ω); Voltage at main PCB connectors NA4-1 BN and BL3-1 BK not 120 VAC ±5%; Kinked or clogged drain hose; Frozen drain hose; Foreign objects clogging drain pump filter or caught in pump impeller

How to Fix

1. 1

   Confirm OE is displayed.

2. 2

   Check connectors at the main PCB and drain pump. If loose or disconnected → reconnect or repair the connector.

3. 3

   If connectors are OK → press WASH/RINSE and DELAY START simultaneously. Check if water level frequency is less than 250. If YES → proceed to check drain pump resistance.

4. 4

   If water level frequency ≥ 250 → check the air dome and pressure hose for clogging. Check the pressure switch (Test #2). If NO clog found → proceed.

5. 5

   Measure resistance of drain pump motor terminals. Expected: 10-20 Ω. If resistance is 10-20 Ω → replace the DRAIN PUMP ASSEMBLY.

6. 6

   If resistance is out of range → check voltage between main PCB connectors NA4-1 BN and BL3-1 BK. Expected: 120 VAC ±5%. If voltage is correct → replace DRAIN PUMP ASSEMBLY.

7. 7

   If voltage is NOT 120 VAC ±5% → replace the MAIN PWB ASSEMBLY.

8. 8

   To activate drain pump for testing: turn on washer, press SPIN SPEED to select LOW, press START/PAUSE — drain pump will energize for several minutes at start of spin cycle.

9. 9

   Always check external causes first: kinked/clogged drain hose, frozen drain hose, foreign objects in pump filter or impeller.

This Error Applies To

LG WM3460CW Series Washers (2019) (2019–present)