When a Whirlpool front-load residential washing machine door fails to lock and displays an error code indicating a door lock fault, follow a structured troubleshooting guide. First, inspect the door latch assembly and strike pin to ensure they align properly and are not physically damaged or clogged with lint. Second, perform a hard power reset by unplugging the machine from the wall outlet for two full minutes to clear electronic control board freezes. Third, check the wiring harness connecting the door lock assembly to the main control board for loose connections. You can troubleshoot lock mechanisms safely using a multimeter. You can verify that your corrective action is successful when resetting the control board or replacing a faulty door lock switch assembly allows the door to lock tightly and start the cycle.
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