Can't select any programmes on my Bosch Exxcel 1400 s express?

Hi
I have tried to use my machine this morning and the display on the machine is showing 1400 and a flashing key! I have checked all the seals on the door and the door shuts fine and cannot be pulled open. Have emptied all the traps and filter on the machine but can not figure out how to solve the problem can anyone help??