C8
Thermomix
Motor Power Stage Fault
C8 error is displayed and the motor will not run, even though the display and buttons work.
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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
Shorted motor power transistors/IGBTs on main PCB, Open motor winding, Burnt motor connector, Overcurrent protection triggered due to internal short
How to Fix / Troubleshooting
Safety first: Immediately unplug the appliance. A motor power stage fault can present a fire risk if repeatedly powered.
- Do not repeatedly restart: Avoid repeatedly trying to start the motor; this can worsen damage to the power electronics.
- Smell and visual check: With the bottom cover removed (only if you are competent), inspect the motor and PCB for burnt components, melted plastic, or discoloration.
- Motor resistance check (advanced): With the unit unplugged, measure resistance across the motor windings. A winding that is open (infinite resistance) or shorted (near zero) indicates a failed motor.
- Service action: Replacement of the motor or main PCB is required in most C8 cases. This involves high-voltage circuitry and should be performed by an authorized Thermomix service center.
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Repair Difficulty
Professional Required
5/5
Required Part
Motor Assembly or Main Control Board
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