F12
Dyson Internal power distribution or low‑voltage rail fault

Robot displays F12 and may stop mid‑clean with no obvious mechanical issue.

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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

Faulty DC‑DC converter on main board, Intermittent battery connection, Shorted peripheral (motor or sensor), Corroded internal connector

How to Fix / Troubleshooting

Safety first: Turn the robot OFF and remove it from the dock. Do not attempt board‑level repairs unless qualified.

  • Check battery seating: If the battery is user‑removable, ensure it is fully seated and the connector is firmly plugged in.
  • Inspect for damage: Look for signs of liquid ingress, burn marks, or a burnt smell from the vents. If present, stop using the robot.
  • Isolate peripherals (advanced): A technician can disconnect brush, wheel, and fan motors one by one to identify a shorted component causing F12.

In most cases, F12 indicates a main PCB failure and the entire control board should be replaced by an authorized service center.

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Repair Difficulty

Professional Required 5/5

Required Part

Main control board
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