F9

Miele Coffee Grinder Motor Fault

Display shows F9; grinder does not run or stops unexpectedly

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.

Possible Causes

Blocked grinder due to stones or hard beans, worn or jammed grinder burrs, failed grinder motor, defective grinder motor driver on control board

How to Fix / Troubleshooting

Safety first: Disconnect power before accessing the grinder. Do not insert fingers into the grinder chute.

User-level steps:

Empty the bean container and remove any foreign objects (stones, metal pieces).
Vacuum out loose coffee grounds from the grinder inlet and chute.
Adjust the grind setting to a slightly coarser setting and test again.

Technical inspection:

Remove the top cover to access the grinder assembly.
Check for coffee buildup around the burrs and clean carefully with a brush.
Attempt to rotate the grinder burrs manually (if accessible) to check for seizure.
Measure the grinder motor resistance and inspect wiring and connectors.

Resolution:

If the grinder is mechanically damaged or the motor is open/shorted, replace the complete grinder assembly or motor as per Miele's parts catalog.
If the motor is good but never receives power, the control board's grinder driver may be faulty and require professional repair.

Repair Difficulty

Hard 4/5

Required Part

Coffee Grinder Assembly

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