This product worked fine for 13 months and then everything that could go wrong, went wrong in one morning.  First we had a "door" warning but door was fine and had worked minutes before, then a "PF" warning came up.  We unplugged the unit and got the same warnings but now the cancel and start buttons did not work.  Tried to open the door but the button broke and door is now inoperable except for the light being on and the turntable going counterclockwise......  Had to unplug it to make it stop turning.  Expensive product to only last one year!