Michael Thompson Key Takeaways
- A clogged filter or food trap is the most common cause of LG dishwasher drainage issues
- Check the drain hose for kinks — it should loop up to the countertop height before going down to the disposal
- Error code OE specifically indicates a drainage problem on LG dishwashers
- Clean the dishwasher filter every 2–4 weeks to prevent drainage problems
The Bottom Line
Most LG dishwasher drainage issues are caused by clogged filters or kinked drain hoses — both easy DIY fixes. If the drain pump has failed, expect a repair cost of From $150.
LG dishwasher not draining — here is what every homeowner should know.
LG washer not draining — here's what you need to know.
Standing water at the bottom of your LG dishwasher after a cycle is a clear sign of a drainage problem. Error code OE on the display confirms it. Most drainage issues have simple solutions you can handle yourself in under an hour.
Clean the Filter and Food Trap
The #1 cause of LG dishwasher drainage problems is a clogged filter. LG dishwashers have a cylindrical filter assembly at the bottom of the tub. Twist it counterclockwise and pull up to remove. Rinse under running water with a soft brush to remove food debris, grease, and mineral buildup. LG recommends cleaning this filter every 2–4 weeks depending on usage. Also check the sump area beneath the filter for broken glass or debris that may block the drain pump intake.
Inspect the Drain Hose
The drain hose connects your dishwasher to the garbage disposal or sink drain. Pull the dishwasher out slightly and check the hose for kinks, pinches, or clogs. The hose should create a high loop — rising to the height of the countertop before descending to the disposal connection. This high loop prevents backflow from the sink into the dishwasher. If the hose is damaged or collapsed, replace it with a universal dishwasher drain hose (From $10).
Check the Garbage Disposal Connection
If your dishwasher drains through a garbage disposal, make sure the disposal's knockout plug has been removed. This is a common issue after a new disposal installation — the installer may forget to punch out the dishwasher inlet. Also run the disposal before starting a dishwasher cycle to clear any food debris that could block the drain path.
Test the Drain Pump
If the filter is clean and the hose is clear, the drain pump itself may have failed. You can sometimes hear the pump trying to run — a humming without actual draining suggests a seized impeller. Drain pump replacements on LG dishwashers typically cost From $150 including parts and labor. The pump is accessible from beneath the unit and is a manageable repair for experienced DIYers.
Run a Maintenance Cycle
After clearing any blockage, run an empty cycle with a dishwasher cleaner or two cups of white vinegar placed in a bowl on the top rack. This helps dissolve grease and mineral deposits throughout the drain path. Running this maintenance cycle monthly prevents future drainage problems and keeps your LG dishwasher performing efficiently.