When a residential dishwasher door keeps popping open spontaneously during operation or right when you press start, the issue is typically caused by a worn-out plastic door catch, a broken or snapped door strike pin, a misaligned cabinet hinge, or a severe lint or food debris buildup caked around the door seal that prevents a flush closure. If the latch cannot maintain mechanical engagement, the internal water pressure and tumbling action force the door open. You can troubleshoot door mechanisms easily by inspecting the latch contact points. You can verify that your corrective action is successful when replacing a worn plastic door catch, installing a new strike pin, or cleaning debris out of the seal allows the door to stay firmly locked shut.
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