Keurig B50 Coffee Maker "fl light blinks" Questions

light: permanently on (one or more events): signals the machine is out of coffee, that the water tank is empty, or the drip tray is full. on and slowly fl ashing (one or more events): signals that the

...light will blink, I can take a small rubber handle and tap where the plastic button is and it will start pumping again. It will work for a day or so and will stop again. What is the problem. Thanks ...