The 2 most common part(s) or condition(s) which cause the symptom Washer door or lid won't lock are listed below starting with the most likely. Check or test each item and watch any available videos.
RepairClinic Item # 1419926
If the door won't latch, the door lock assembly might be defective. These are normally made of plastic and cannot be repaired. If the door won't latch and the door lock is broken, replace it.