F12
Miele
Motor Speed or Position Sensor Fault
Miele app shows F12 motor sensor error; disposal may not start or may shut down unexpectedly.
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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
Defective Hall-effect sensor on motor, Damaged sensor wiring harness, Faulty control PCB input, Excessive metal debris around sensor
How to Fix / Troubleshooting
Safety warning: Disconnect power at the breaker before removing any covers.
- Visual inspection: Remove the lower cover (if serviceable) to access the motor sensor area. Look for loose connectors or damaged wires.
- Clean area: Use a dry cloth to remove metal filings or debris that may interfere with sensor operation. Do not use water or solvents.
- Reconnect harness: Reseat the sensor connector on both the motor and control board ends, ensuring a firm connection.
- Test operation: Restore power and test the disposal. If F12 returns, the sensor or control board likely needs replacement by a Miele technician.
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Repair Difficulty
Hard
4/5
Required Part
Motor Speed Sensor
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