When I close the dishwasher door and press the normal cycle on my Whirlpool Quiet Partner III, the LED display shows "--". If I hit start/resume, the display goes blank. If I press it again, the drain pump starts on a 2 minute cycle. Not sure what I should do. Tried to the the reset and it just went into a short rinse cycle once all of the LEDs turned off. Has anyone had experience with a similar problem?

Thanks