High-end Bosch residential dishwashers frequently experience specific door latch and interlock issues over time, including mechanical wear on the plastic latch hook, failure of the integrated microswitch to signal the control board that the door is closed, and latch misalignment caused by shifting cabinetry during installation. When the microswitch fails, the dishwasher will refuse to power on or start a cycle. You can troubleshoot door latch faults safely by disconnecting power and inspecting the assembly. You can verify that your corrective action is successful when replacing a broken plastic latch mechanism or securing misaligned mounting screws restores electrical continuity to the microswitch, allowing the dishwasher to start normally.
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