Is this a blinking red light that shines on the floor? Mine shines the red light on the floor - blinking when interrupted or door open and steady red when running. It only appears when you’ve started a cycle and maybe opened the door. You have to press “start” and then shut the door. The light should remain red but not blinking.
if it needs Jet Dry it gives you a mysterious code on the display. I google the code (for example “h1 error code Bosch dishwasher”) and that should tell you what the code means.