Quick answer
Power off fully, follow battery guidance, wear gloves, and inspect for packed grass, string, sticks, damaged blades, or resistance.
Illustrative troubleshooting image; not a manufacturer product photo.
Fix it in this order
- Shut down safely.
- Wear cut-resistant gloves.
- Remove loose obstruction.
- Inspect blade fit and movement.
- Check permitted disc movement.
- Look for impact damage.
- Run a short dry test.
What usually causes this?
Packed grass, wrapped string, trapped objects, bent blades, bearing resistance, damaged wiring, or a control fault may trigger E3.
How to verify the fix
The disc should move normally and a supervised test should run without unusual noise or E3.
Do not skip this check: repeat the affected action under supervision before restoring schedules.
Frequently asked questions
Should I reset it first?
No. Record the exact message and inspect the likely physical or connection cause first.
Should I replace a part immediately?
Only after official checks isolate that component.
When should I stop?
Stop for damaged wiring, unusual heat, swelling, burning odor, water inside electrical parts, or repeated hardware faults.
When to contact support
Contact Worx support if the message returns after the official checks. Send the model, serial number, firmware version, photos, and a short video.
Source and scope
Primary reference: Worx official support.
RobotMower.help is independent and is not affiliated with or endorsed by Worx. Product behavior can vary by model and firmware.