LG OE Error: Drain Timeout / Water Not Draining
Troubleshoot LG dishwasher OE code (drain failure).
Drain failure. The dishwasher control board detects that the wash tub did not completely empty within the allowable drain time limit (typically 3 to 4 minutes).
Probable Causes
Food particles (olive pits, fruit stickers, toothpicks) jamming the drain pump impeller blades.
Un-removed knockout plug on a newly installed garbage disposal inlet nipple.
Burned out or open drain pump motor field winding.
Diagnostic & Testing Steps
- •Chime sounds at end of cycle and OE error code flashes on front display.
- •Dirty, cloudy water remains standing above the stainless bottom filter plate.
- •Drain pump hums or vibrates but fails to push water into kitchen sink drain pipe.
Tools & Equipment Required
- ✓Digital Multimeter (Resistance Mode)Measure drain pump motor winding resistance (normal specification: 15 - 25 Ω).
- ✓Phillips #2 Screwdriver & 10mm SocketRemove lower service panel to access drain pump and check valve.
- ✓Needle-Nose PliersExtract trapped food bones or plastic wrap from pump impeller chamber.
- ✓Absorbent Sponge & TowelClean water from sump basin before unseating drain pump motor.
- ✓Inspection FlashlightCheck rubber check valve flap inside sump for hardening or grease warping.
Fast Reset Sequence: LG Electronic Hard Power Reset
Before unmounting panels or beginning diagnostic procedures, attempt this manufacturer reset to clear transient microcomputer lockouts:
- 1.Press Power to switch the machine off.
- 2.Unplug the unit from the electrical wall outlet.
- 3.While completely disconnected, press and hold Start/Pause for 5 seconds, followed by holding Power for 5 seconds.
- 4.Plug unit back in, select Drain/Spin mode, and verify that the control relay clicks properly.
- 1
Step 1: Inspect Kitchen Sink Garbage Disposal Drain Port
[ ] DoneDisconnect dishwasher drain hose from disposal nipple. Probe inlet hole with screwdriver to verify knockout plug was removed.
Verification:Path into garbage disposal grinding chamber is fully open and free of solidified grease. - 2
Step 2: Clean Sump Sieve and Drain Impeller
[ ] DoneRemove lower dishrack, rotate upper filter counterclockwise, lift mesh screen, and clean debris with brush.
Verification:Mesh filter screen is clear of scale and drain inlet port shows no foreign objects. - 3
Step 3: Test Drain Pump Motor Resistance
[ ] DoneRemove bottom front access panel, disconnect wire harness from drain pump, and measure ohms across terminals.
Verification:Reading measures 25–35 Ω on 200Ω scale. Open circuit (OL) or 0 Ω indicates pump motor failure.
Repair Solutions
Check garbage disposal inlet and knock out plastic plug if disposal was recently replaced.
Inspect and clean the 3-piece filter assembly in the base of the wash tub.
Measure resistance across drain pump motor terminals (healthy range: 25 to 35 Ω).
Frequently Asked Questions
Why does OE appear on my newly installed LG dishwasher?
Over 90% of new install OE codes are caused by plumbers forgetting to punch out the plastic knockout plug inside the garbage disposal drain barb.
How do I force an LG dishwasher to drain immediately?
Press and hold the Start/Cancel button for 3 seconds. The machine will cancel the active cycle and run the drain pump for 60 seconds.