LawnMaster Intermittent Power Loss

Robot mower occasionally shuts off completely in the middle of the lawn with no error code on restart.

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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, Damaged main power switch, Internal battery pack fault, Cracked solder joints on main control board power input

How to Fix / Troubleshooting

Safety first: Turn OFF the mower and remove the battery before inspecting internal connections.

  • Check battery plug: Ensure the LawnMaster battery connector clicks firmly into place and shows no signs of overheating.
  • Inspect main switch: Operate the main power switch several times and feel for looseness. Replace if it feels sloppy or intermittent.
  • Examine wiring: Look for loose or burnt wires at the main control board power terminals.
  • Gently tap test (advanced): With the mower powered on and safe (blades disabled), gently tap the housing near the main board. If it cuts out, suspect a bad solder joint or connector.

Persistent intermittent shutdowns usually require replacement of the main power switch, battery pack, or main control board after proper diagnosis.

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Repair Difficulty

Hard 4/5

Required Part

Main Power Switch
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