How to Enter Diagnostic Mode on a LG Dishwasher
LG dishwashers show two-letter codes on the display and transmit fault history via SmartDiagnosis on connected models.
Step-by-Step: LG Dishwasher Diagnostics
- 1
Read the active code (AE, OE, IE…) from the display.
- 2
For the AE leak code: pull the unit and inspect the base pan — the float sensor in the pan trips on any accumulated water.
- 3
SmartDiagnosis via ThinQ reads stored faults on connected models.
- 4
The tech sheet (in a plastic sleeve behind the kick plate) documents the service-mode button sequence for your control revision.
💡 Good to know: OE drain faults: check the drain hose loop height and the air gap before condemning the drain pump — installation issues cause the majority.
Found a Code? Look It Up
Once diagnostics shows you a stored code, find its meaning and fix guide in the full LG dishwasher code list. These are the highest-priority codes on this platform:
AE OE FE HE LE CE
Leakage detected — water found in base tray
⚠ High Severity Drain error — dishwasher not draining
⚠ High Severity Water overflow — overfill protection triggered
⚠ High Severity Heater failure — water not heating
⚠ High Severity Leakage detected — flood protection activated
⚠ High Severity Motor/pump over-current error
⚠ High Severity Frequently Asked Questions
How do I clear the AE code on an LG dishwasher? +
AE means the leak float in the base pan tripped. Tip/towel the pan dry, find the source of the water, then power-cycle. The code clears once the float drops.