NAC
Intermittent Power Loss
Robot lawnmower occasionally shuts down in the middle of the lawn with no error message on the display.
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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, Faulty main power switch, Cracked solder joint on main board power input, Vibration‑sensitive wiring harness
How to Fix / Troubleshooting
Safety first: Turn OFF the mower and remove the battery before inspecting internal wiring.
- Check battery fit: Ensure the NAC battery pack is firmly seated and latched in its compartment.
- Inspect main switch: Operate the main power switch several times and feel for any looseness. Replace if it feels sloppy or intermittent.
- Wiggle test (advanced): With the mower powered ON and stationary, gently tap or wiggle the housing near the battery and main board. If the display flickers, locate and secure the loose connection.
- Reseat connectors: Open the housing and reseat all main power connectors between the battery, switch, and main PCB.
Warning: Do not bypass the main switch. If you cannot locate the intermittent fault, consult a NAC service technician.
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Repair Difficulty
Medium
3/5
Required Part
Main Power Switch
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