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 latch assembly might be defective. Inspect the door latch for damage. If the door latch is damaged, 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.