Error code OE on an LG front-load or top-load washing machine stands for Output Error / Drain Failure. The main PCB initiates tub evacuation by sending 120V AC to the drain pump motor. If the electronic pressure switch frequency does not rise above 24.8 kHz (the calibration frequency for an empty tub) within 10 minutes, cycle execution halts and the washer beeps continuously with an OE fault code.
Before ordering an expensive replacement pump or control board, performing the manual cleanout procedure clears the problem in 8 out of 10 instances.
Step 1: Emergency Coin Trap Filter Cleanout
If the washer halted during a hot wash or sanitize cycle, allow the tub water to cool for 20 minutes before pulling the emergency drain plug.
- Power off the washer and unplug from the electrical wall outlet.
- Press the thumb tab on the small rectangular door located at the bottom left of the washer’s front panel to open it.
- Pull out the flexible black drain hose from its plastic holder clip.
- Position a low baking tray or shallow container beneath the hose and pull out the black rubber plug. Drain water into the container, replacing and dumping as needed until completely empty.
- Reinsert the plug into the drain hose and clip it back into place.
- Turn the round white drain pump filter handle counter-clockwise until it unlocks and pull it straight out.
- Clear trapped debris (coins, hair clips, lint balls, pet hair). Reach your index finger into the pump housing cavity and spin the impeller. It should turn smoothly with a springy magnetic click resistance, but must not bind or lock up.
- Reinstall the filter, turn firmly clockwise to lock, close the access door, and plug in the washer.
Step 2: Multimeter Resistance Test on LG Drain Pump (10.5–14.5 Ω)
If the filter was completely clean but the pump motor emits an angry buzzing sound or fails to rotate, the motor windings may have failed.
| LG Drain Pump Test Terminals | Expected OEM Reading | Diagnostic Interpretation |
|---|---|---|
| Terminal Pin 1 to Terminal Pin 2 (120V AC Pump) | 10.5 Ω to 14.5 Ω | PASS: Motor coil winding is intact. Check wiring harness continuity to the main control board. |
| Either Terminal to Pump Metal Frame (Ground) | Infinite (O.L.) | PASS: No electrical breakdown to ground detected. |
| Open Circuit (O.L. or infinite) | Infinite / Over 100k Ω | FAIL: Internal thermal protection fuse has blown open. Replace pump motor. |
| Short Circuit (Below 4.0 Ω) | 0.0 Ω to 4.0 Ω | FAIL: Shorted motor winding. Will cause PCB triac fault. Replace pump motor. |
OEM Replacement Part Information
LG Washer Drain Pump Motor Assembly
OEM Part Number: 4681EA2001T (Replaces AGM73269501, 4681EA1007G, AP5328388, PS3579318)
Compatibility: Fits LG WM0642HW, WM2050CW, WM2277HW, WM3400CW, WM3900HBA, WM4000HBA, and Kenmore Elite 796-series.
Installation Time: 30 minutes using a Phillips screwdriver and pliers.
Connected Diagnostic Procedures & Next Steps
Drain water retention is the primary trigger for locked drum alarms on LG Direct Drive systems. Cross-reference these essential sister articles:
Frequently Asked Questions
Why did OE appear after running a load of heavy blankets?
Heavy water-logged items like comforters can compress against the bottom tub outlet opening or shedding fleece fibers can suddenly blanket the coin trap mesh filter, choking the intake of the pump.
How do I unlock the LG door when OE is displayed?
Drain the water via the black emergency rubber tube next to the coin filter. Once the water level in the drum drops completely, wait 60 seconds and the door latch will click and unlock.
