E42
Bosch
Door Lock Circuit Error
Washer-dryer shows E42 and door remains locked or cannot be locked
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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 door lock coil, Broken lock wiring, Control board lock driver failure, Incorrect door lock fitted
How to Fix / Troubleshooting
Safety first: Unplug the appliance. Use the emergency release to open the door if necessary.
- 1. Inspect door lock: Access the lock assembly and check for burn marks or melted plastic. Replace if damaged.
- 2. Test lock coil: Measure resistance across the lock coil. An open or shorted reading indicates a faulty lock.
- 3. Check harness: Trace the wiring from the lock to the control board, looking for breaks or pinched sections.
- 4. Replace lock with correct part: Ensure you use the exact Bosch part number specified for your model.
- 5. If E42 remains: The control board output may be defective and should be checked by a technician.
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Repair Difficulty
Medium
3/5
Required Part
Door Lock Assembly
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