General motor error; drum may not turn or turns erratically; E20 displayed
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.
Possible Causes
How to Fix / Troubleshooting
Safety first: Unplug the appliance. Motor and inverter testing involves hazardous voltages; proceed only if qualified.
Step-by-step checks:
- 1. Inspect motor and wiring:
- Remove rear panel and check motor connector for burns or looseness.
- Inspect harness from motor to inverter/power module.
- 2. Basic motor tests:
- For BLDC motors, measure winding resistances; they should be similar between phases.
- For universal motors, check continuity and insulation.
- 3. Inverter module:
- Look for visible damage (burn marks, bulging components).
- Replace inverter or main control if confirmed faulty.
When to call a technician: Motor and inverter faults should generally be handled by an authorized Siemens technician.
Repair Difficulty
Required Part
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