Cub Cadet Intermittent Power Loss

Robot mower starts but shuts off randomly during mowing with no 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 battery connector, Cracked solder joints on main PCB, Failing main power switch, Internal wiring harness intermittent

How to Fix / Troubleshooting

Safety first: Turn OFF the mower and disconnect the battery before opening the housing.

  • Wiggle test (visual): Inspect the battery connector and main power switch. Look for signs of arcing or looseness.
  • Secure connectors: Reseat all major power connectors (battery, motor harnesses) until they click firmly.
  • Check for vibration damage: Look for wires rubbing against sharp edges or being pinched by covers.
  • Test on flat area: After reassembly, run the mower on a flat, smooth area and observe if shutdowns still occur.

Persistent random shutdowns often require main PCB replacement or professional re‑soldering of cracked joints.

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Repair Difficulty

Hard 4/5

Required Part

Main Power Switch
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