Keurig Descale Light Stays On. If you descale and the descale light is still on, hold down the 8oz and 10oz buttons at the same time, and hold for 5 seconds and the light will go off. If all lights on your keurig coffee maker (add water, heat and medium cup size buttons) are flashing, the issue likely is the charcoal filter in your tank.
In some cases, the machine stops working. Unless you’re certain that there are no further obstructions in the needle or anyplace else, you should descale your coffee maker. Some methods help remove the descaling light signal.