You gotta prop a chair against it.

We've had this front-loader washing machine for about nine years. But now you gotta prop something heavy against the door or it won't go. Good thing there just happens to be a big, padded chair down there, in the middle of the room, doing nothing. If you push it against the door and press it in, you can trick the washing machine into thinking the door is actually shut, which it actually is. And was, even before this work-around.