I too had a problem with the door latch. I replaced the entire unit with a new one and it continued to fail to latch. I then scrubbed the connectors on the main circuit board in and out several times, and it began to work normally. I suspect that the control voltage thru the button is low enough that if the contacts get a little dirty the brain won't see a signal. I had the same kind of problem recently with a Kitchen Aid dishwasher. (Cleaning the connector to the front film bottons fixed that too!)