E12
Makita
Chassis Deformation / Safety Interlock Fault
Robot mower shows E12 and stops, often after hitting a hard obstacle
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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
Bent chassis frame affecting safety switches, Dislodged safety interlock switch, Cracked housing around sensor mounts, Severe impact damage
How to Fix / Troubleshooting
Safety: Turn OFF the mower and inspect the exterior carefully.
- Check for visible damage: Look for cracks, warping, or misalignment of the top cover, front bumper, and side panels.
- Test cover switches: Open and close any service covers or hatches to ensure their safety switches click and engage properly.
- Realign housing: If the top cover is mis-seated, remove and reinstall it so that all clips and screws are correctly engaged.
- Internal inspection: If comfortable, open the housing and check that safety interlock switches are still firmly mounted and actuated by the covers.
- Reset: After reassembly, power ON and clear E12.
Significant chassis deformation or broken safety switch mounts usually require replacement of the housing or switch assemblies by a Makita service center.
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Repair Difficulty
Hard
4/5
Required Part
Safety Interlock Switch
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