E21
Liebherr
Motor Tachometer / Speed Feedback Fault
Washer-dryer shows E21; motor attempts to start but stops immediately.
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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 tachometer sensor on motor, Loose tachometer wiring, Demagnetized tachometer ring, Motor control PCB fault
How to Fix / Troubleshooting
Safety first: Disconnect power before accessing the motor.
- Inspect tachometer: Remove the rear panel and access the motor. Check the tachometer sensor and magnet ring at the rear of the motor for damage or looseness.
- Check wiring: Ensure the tachometer wires and connector are secure and not broken.
- Measure tachometer resistance: Use a multimeter to check the coil resistance. Replace the tachometer or motor if open-circuit.
- Control board: If tachometer and wiring are good, the motor control section of the main PCB may be defective and should be replaced by a technician.
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Repair Difficulty
Hard
4/5
Required Part
Motor Tachometer Sensor
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