E4
McCulloch
Tilt Sensor Activated / Excessive Incline
Robot mower shows E4 and stops immediately when trying to start or during operation.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Mower parked on steep slope, Tilt sensor out of calibration, Tilt sensor module failure, Loose tilt sensor mounting
How to Fix / Troubleshooting
Safety first: Switch OFF the main power and move the mower to flat, stable ground before inspection.
- Check terrain: Ensure the charging station and starting area are on level ground. Relocate the charging station if it is on a slope that exceeds the mower's specification.
- Inspect for obstruction: Verify the mower is not riding up on roots, stones, or edging that cause it to tilt excessively.
- Locate tilt sensor: Inside the mower, the tilt sensor is usually a small module fixed to the chassis. Confirm it is firmly attached and not loose.
- Check wiring: Inspect the tilt sensor harness for damage and ensure the connector is fully seated on the main PCB.
- Reset: With the mower on level ground, turn the main switch OFF for 30 seconds, then ON again. If E4 continues on level ground, the tilt sensor module likely needs replacement.
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Repair Difficulty
Medium
3/5
Required Part
Tilt Sensor Module
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