Reset code for Kenmore Ultra Wash 280-2. Start button flashing. Lock button on. Holding down heated dry doesn't unlock it.

See if this repair manual helps: https://dl.dropbox.com/u/8010163/Ken...Dishwasher.pdf
You need to check out the dishwasher to find out why it will not run. It could be the high water float stuck, for example, or a stopped up filter or drain.