Only the start button on my whirlpool dishwasher won't work

SOURCE: Whirlpool dishwasher, flashing start button

you have a door suitch proble may sure the door is totaly close try that good luck

SOURCE: The Whirlpool Dishwasher GU 2400 won't staart

Sometimes I have to push the cancel button on my Kitchenaid and start over and push the selection buttons again. and then push start. Don't know if this will help.

SOURCE: Whirlpool dishwasher model Gu2548XTPS7, clean light flashes 7 times and won't start.

the flashing light is an error code,you either have a bad heater or the board is bad,once you reset it after like 6 or 7 wash loads it will start over again,if you remove the bottom kick panel,you'll find the tech sheet there,look up light flashes 7 times and it will tell you how to check the heater from the board to see if the heater or board is bad