Rinse and empty light comes on. Dis...

My Kenmore Dishwasher Model 665.15712 has the touch control panel shown on the top of page 12 in Manual 3384533. Below the "air Dry" button, a "red light" and the words "Rinse and Empty" comes on when I try to start the dishwasher. I have pushed the "cancel and Drain" button but the button does nothing. When I try to start the dishwasher using "sani-wash" or any of the other normal ways to start the dishwasher, the "Rinse and empty" light comes on and after some 30 seconds the panel kicks off.