AL-KO Intermittent Power or Electronics Fault

Robot mower occasionally reboots or restarts by itself 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

Loose battery connector, Intermittent short in wiring harness, Failing main PCB, Vibration causing poor contact at connectors

How to Fix / Troubleshooting

Safety first: Turn off the mower and remove it from the lawn before opening any covers.

  • Check battery plug: Open the battery compartment and ensure the connector is fully seated and locked.
  • Inspect wiring harness: Look for chafed or pinched wires, especially where the harness passes through moving parts or tight spaces.
  • Reseat PCB connectors: Carefully disconnect and reconnect the main multi-pin connectors on the main PCB to improve contact.
  • Vibration test: With the mower on a bench and powered (blades disabled), gently tap around the housing to see if reboots occur, indicating a loose connection.
  • PCB replacement: If reboots continue after securing all connections, the main PCB may be defective and should be replaced.
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Repair Difficulty

Hard 4/5

Required Part

Main Wiring Harness or Main Control PCB
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