F8
Melitta Brew Group Sensor / Encoder Fault

Display shows F8 and the machine cannot detect or move the brew group correctly.

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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 brew group position sensor, Broken sensor wiring, Misaligned sensor magnet or flag, Control board sensor input failure

How to Fix / Troubleshooting

Safety first: Disconnect from mains before opening the service door or covers.

Steps:

  • Remove and reinstall brew group: Take out the brew unit, clean it, and reinstall carefully to ensure proper alignment.
  • Inspect sensor area: Locate the brew group position sensor (microswitch or Hall sensor) near the drive mechanism. Check for coffee residue or moisture contamination and clean gently with a dry cloth.
  • Check wiring: Ensure the sensor cable is not pinched or disconnected from the control board.

If the sensor is physically damaged or tests faulty with a multimeter, replace it. If wiring and sensor are good, the control board may need replacement by a technician.

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Repair Difficulty

Hard 4/5

Required Part

Brew Group Position Sensor
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