Hyundai
Intermittent Electronics / Firmware Fault
Robot lawnmower randomly restarts or freezes during operation without showing a specific error code.
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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
Loose main PCB connectors, Failing main control board, Electrical noise from damaged motor, Firmware bug requiring update
How to Fix / Troubleshooting
Safety first: Turn off the mower and remove it from the lawn before opening the housing.
- Reseat connectors: Carefully disconnect and reconnect the main harness connectors on the Hyundai main PCB, including battery, motors, sensors, and keypad.
- Inspect for damage: Look for burnt components, bulging capacitors, or corrosion on the PCB.
- Check motors: A failing motor can inject noise into the system. Listen for unusual motor sounds and replace suspect motors.
- Firmware update: If Hyundai provides firmware updates via USB or service tool, update to the latest version following official instructions.
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Repair Difficulty
Hard
4/5
Required Part
Main Control Board
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