Re Diplomat ADP 8332?

Re Diplomat ADP 8332
I have no instruction book for this machine which I acquired second hand. It has been working fine but it is hit and miss as to how it starts and I can't figure out what it is I have done previously to make it go! To the far right there is a red light and I don't know how to switch it off - I think this relates to why I now cannot get the machine going. It doesn't help that I can't get my fingers on the buttons once the fully integrated door is closed as they are located at the narrow top edge. This means that I have to set the machine to work once the door is closed. I hear the motor start but no water coming in and then a few minutes later the motor stops again
Lesley