LG · Washing Machine
LG Washing Machine OE Error Code
Water won't drain from the tub
What this error means
OE is LG's Outlet Error. The drain pump ran but water remained in the tub after the allowed drain window—about 5–7 minutes on most front-loaders, or up to 13 minutes on some top-load models. The washer stops before spin to avoid leaving a full tub.
How OE is detected
When OE appears on a LG washing machine, the control board has confirmed that water did not leave the machine within the programmed drain window. On LG WM3400CW, LG WM3900HWA, and similar variants, the drain pump runs for a fixed interval—often three to seven minutes on washers and dishwashers—while a pressure switch or turbidity sensor verifies the tub or sump is empty. If water remains, the cycle stops to prevent spin with a full tub or overflow on the next fill.
Most OE calls are resolved without parts: open the bottom-front service panel, drain the emergency hose into a shallow pan, then unscrew and clean the pump filter. Restricted drain paths mimic pump failure because the impeller spins against a blocked hose or filter. Document whether the pump hums audibly during the drain step; a humming pump with no water movement points to a clogged filter or kinked hose, while silence may indicate a failed pump motor or loose wiring at the harness.
After clearing blockages, run a short cycle and listen at the drain hose for steady water flow. If OE returns on the next load with a clean filter and straight hose, measure resistance at the pump motor connector per the service manual for your model before ordering a replacement pump assembly.
Common causes
- Pump filter clogged with lint, coins, or hair ties
- Drain hose kinked behind the washer or pushed too far into the standpipe
- Excess suds from non-HE detergent creating air pockets in the pump
- Frozen drain hose or standpipe in cold weather installations
Step-by-step fixes
- 1Open the bottom-front service panel, drain the emergency hose into a shallow pan, then unscrew and clean the pump filter
- 2Straighten the drain hose and keep 4–10 inches clearance from the wall so it cannot kink
- 3Disconnect the hose at the standpipe and confirm water flows freely during a Spin cycle test
- 4Run a Tub Clean cycle with reduced detergent if suds were visible before the error
When to call a technician
Call service if the pump hums during spin but water never moves—the drain pump motor or impeller likely failed.
Affected models
- LG WM3400CW
- LG WM3900HWA
- LG WT7800CW
Prevention & maintenance
- Clean drain filters and hose terminations monthly on high-use washing machines to prevent OE from lint and food debris buildup.
- Record when OE appears in the cycle and whether it clears after a 60-second power reset on your LG washing machine—that detail speeds diagnosis if you call service.
- Keep the model and serial number from the rating plate when ordering parts for OE; LG uses multiple revisions with different harness lengths and board firmware.
- Photograph wiring connector orientation before disconnecting any component while troubleshooting OE; reversed plugs on pumps and valves cause immediate repeat faults.