Quick summary
The most common cause is a clogged filter in the tub base. Clean it once the tub cools, then make sure the drain hose isn't kinked. If water remains, the drain pump needs testing.
A dishwasher drains several times per cycle. When water stays in the base or OE appears, it didn't drain fully. LG advises cleaning the filter every one to two weeks depending on use.
Unplug the appliance, close the water tap if there's a leak, and never open covers that need tools or expose wiring or circuits.
Possible causes
Clogged filters
Food scraps, small bones and broken glass collect in the filter and block flow.
Kinked drain hose
Especially after built-in installation.
Wrong hose height
LG recommends keeping the hose end raised (at least 30 cm above the floor in its guidance) to prevent backflow.
Blocked kitchen drain
Grease build-up in the sink drain affects dishwasher draining.
Weak drain pump
A lodged object or electrical fault.
Safe checks you can do
- Unplug and let the tub and water cool.
- Remove the lower rack, unlock the filter as your manual shows and rinse it with a soft brush.
- Carefully clear visible debris around the filter housing (watch for glass).
- Check the drain hose under the sink isn't kinked or crushed.
- Make sure the sink drain itself flows freely.
- Refit the filter securely and run a short program.
When to stop checking immediately
- Don't reach into the sump without seeing clearly—there may be glass.
- If OE returns after cleaning and correcting the hose.
Related components
- Filter assembly
- Wash & drain pumps
- Drain system
When do you need a technician?
The technician tests the drain pump, check valve, hose and sink connection, and the board, then runs a drain test.
Related error codes
FAQ
How often should I clean the LG dishwasher filter?
LG guidance suggests every one to two weeks depending on use.
Is a little water in the base normal?
A very small amount around the filter can be normal on some models, but water pooling above the filter is not.
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