Washer-dryer shows E16 and may stop during spin; drum speed seems uncontrolled or erratic.

Safety first: Disconnect power before accessing the motor.

• Access motor: Remove the rear panel to expose the drive motor.
• Inspect tachometer: At the rear of the motor, check the tachometer assembly. Ensure the magnet is secure on the shaft and the coil is not cracked or loose.
• Check wiring: Inspect the tachometer wires and connector for damage or corrosion. Reseat the connector.
• Test tachometer coil: Use a multimeter to measure resistance across the tachometer terminals. Replace the tachometer or motor if readings are out of specification.
• Professional diagnosis: If the tachometer and wiring are good, the speed control circuit on the PCB may be defective and should be checked by a technician.