Reviewed by Marcus Hale · Last reviewed August 17, 2026
Written by
Elliot Mercer Appliance Repair Content EditorReviewed by
Marcus Hale Appliance Repair Content SpecialistPublished August 17, 2026Technically reviewed August 17, 2026
Content status:
Verified
Error codeE03
ApplianceTumble Dryer
Quick answer
Sump/base full or float-switch water detection
Model compatibility: LG reuses codes across series and model years, so E03 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
Plain language
What this error means
Sump/base full or float-switch water detection
Signs
Symptoms you may notice
The tumble dryer displays E03 and temperatures seem off
E03 appears intermittently during operation
The tumble dryer behaves inconsistently with E03 shown
Why it happens
Possible causes
A temperature sensor reading out of range
A wiring or connection issue to the sensor
A control interpreting the reading as an error
Before you book
Safe checks you can make
These are simple, non-hazardous checks only. If anything is unclear, stop and request repair service.
Confirm nothing is blocking internal vents or airflow
Note the actual behavior or temperatures if measurable
Perform a manufacturer-approved restart
Record the full model number before contacting a technician
Important safety warning. Do not open internal panels, access high-voltage wiring, or bypass any safety device. If you see smoke, sparks, a burning smell, or water near electrical parts, switch the appliance off at the outlet if it is safe to do so and call a professional.
Please avoid
What not to attempt
Do not open internal panels or access high-voltage components
Do not bypass door locks, safety switches or interlocks
Do not keep running the appliance if there is water near electrical parts, a burning smell or sparks
Get help
When to request repair service
If E03 persists after the safe checks above, or you are unsure at any point, book a diagnosis. A technician can confirm what E03 means on your specific model and resolve the underlying cause safely.
Seeing this code on your LG appliance?
Book a specialist visit for a clear estimate and approval before any repair. Independent service — not an official LG service center.
A single power reset can be useful when the owner manual allows it, because it shows whether the event was temporary. A reset does **not** repair a recurring sump/base full or float-switch water detection condition.
No. The code identifies a detected condition or subsystem. Wiring, connectors, installation conditions, related sensors/actuators, and the control board can produce the same diagnostic result.
If the product cannot complete its normal function, leaks, overheats, trips electrical protection, or the code involves gas/refrigeration/high-voltage safety, stop operation. For a minor user-correctable condition, retest only after the documented cause has been corrected.
Have the full LG model number, serial number, exact code **E03**, any aliases shown by the display, and a short description of when the error appears. That information helps match the correct service table. ## Related LG Dryer error codes - [nE](/error-codes/lg-dryer-ne-error-code/) - [tE1](/error-codes/lg-dryer-te1-error-code/) - [E13](/error-codes/lg-dryer-e13-error-code/) - [nF](/error-codes/lg-dryer-nf-error-code/) ## Source and scope Primary technical reference: https://www.lg.com/us/support/help-library/lg-dryer-error-code-list--20152310891742 This page summarizes LG diagnostic information for repair-oriented troubleshooting. It is not affiliated with or endorsed by LG Electronics. Model-specific LG documentation takes precedence when definitions differ.
