The part(s) or condition(s) listed below for the symptom Washer door or lid won't lock are ordered from most likely to least likely to occur. Check or test each item, starting with the items at the top of the page.
The door lock secures the washer door shut during operation. Once the washer door is closed, the washer can begin operating. If the door lock is defective, the washer door will not latch properly. The door lock can fail either mechanically or electrically. Inspect the door lock for damage. If the door lock is damaged or does not latch properly, replace it. To determine if the door lock has failed electrically, use a multimeter to test each of the door lock switches for continuity. If one of the switches does not have continuity, replace the switch.
The door lock assembly might be defective. Inspect the door lock for damage. If the door lock is damaged, replace it.
The door latch assembly might be defective. Inspect the door latch for damage. If the door latch is damaged, replace it.
Inspect the door strike assembly for damage. If the door strike is broken, replace it. The door strike is not repairable—if it is broken, you must replace it.
The main control board may be defective. However, this is rarely the case. Before replacing the main control board, first check all of the components of the lock mechanism. If none of these parts are defective, consider replacing the main control board.