The problem is the k cups. Too much coffee and they plug, too fine of grind and they plug. I bought a new machine and still had the same problems. Solution punch 4 or 5 holes in the kcup bottom and brew away. We started getting this problem from time to time, some k cups are worse than others, but the holes always fix it. And if your machine is old try some of the other tips first, because sometimes it is them.