When a residential appliance door—such as a clothes dryer or dishwasher—fails to latch securely, it indicates that the mechanical interlock components are misaligned, broken, or blocked by physical debris. On a dryer, this prevents the safety microswitch from engaging, which stops the motor from running. On a dishwasher, an unlatched door prevents the cycle from initiating to avoid water leaks. You can troubleshoot door locking mechanics easily by inspecting the strike and catch. You can verify that your corrective action is successful when replacing a broken plastic door strike pin or cleaning out jammed debris allows the door to close firmly, click into place, and engage the internal safety switches properly.
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