neff dishwasher won't start?

Possibly the decor door of the machine, if it stands higher than the height of the door, is contacting the kitchen cabinet before the door has fully shut. The door switch mechanism is operated by a magnet aligning with a reed switch if the door does not shut fully they don't align. You could prove this by removing the decor door (the 2 screws top left and right and the 2 middle screws left and right) if it works ok with the decor door off call the installer back to refit it correctly. When door off try "reset" before starting.

Kenjo
June 2014