Dishwasher will start a washing cycle if I leave the door closed and latched; will also restart a wash cycle if I leave it in "Clean" status after a wash cycle.

Have tried resetting using "options" buttons in 1-2-1-2 sequence. No help; lights cycle thru a test sequence, but problem remains.
Wash cycle works correctly if I make sure not to latch the door until I'm ready for it to wash.

Need a repair manual or advice on what to check.