C143 error, appliance refuses to start motor even with empty bowl

Safety first: Unplug the unit before any inspection. Do not attempt to bypass safety systems.

• 1. Basic reset: Remove the bowl, unplug the appliance for 5 minutes, then reconnect and power on. Sometimes transient faults clear after a full power cycle.
• 2. Check for mechanical blockage: Ensure the mixing knife rotates freely by hand (with the bowl removed and cool). A seized knife can cause abnormal tachometer readings.
• 3. Test without load: Insert the empty bowl, close the lid correctly, and try a low-speed setting. If C143 appears immediately, the issue is likely electronic rather than mechanical.
• 4. Do not disassemble motor: The tachometer sensor is integrated with the motor and requires specialized tools and calibration. User repair is not recommended.
• 5. Contact service: Provide the error code and circumstances to Vorwerk support. A technician will typically test the motor assembly, motor harness, and main control board and replace the defective component.