E20
Bosch
Motor Control / Inverter Fault
Washer-dryer displays E20 and may not start or may stop unexpectedly; often motor-related
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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 inverter module (on brushless motors), Shorted motor windings, Loose motor harness, Overcurrent protection triggered
How to Fix / Troubleshooting
Safety first: Unplug the appliance. Motor and inverter circuits carry dangerous voltages.
- 1. Visual inspection: Remove the rear panel and inspect the motor and any attached inverter module for burn marks, melted plastic, or a burnt smell.
- 2. Check harness: Ensure the motor wiring plug and any intermediate connectors are fully seated and undamaged.
- 3. Drum movement: Rotate the drum by hand to confirm there is no mechanical seizure that could overload the motor.
- 4. Professional testing: Inverter and brushless motor diagnostics require specialized tools and knowledge. Do not attempt to repair the inverter PCB yourself; instead, have a Bosch technician test and replace the motor or inverter module as needed.
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Repair Difficulty
Professional Required
5/5
Required Part
Motor Inverter Module
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