One day my Keurig worked fine, the next it wouldn’t pump water. The lights worked and I could hear the pump, but no water was coming out. Turns out some coffee grounds had worked their way into the water line. I was able to clear them by using a soda straw. I filled the tank half full of water. I placed the soda straw against the rubber gasket under the “hood” where the water comes out of the machine. I alternately blew and sucked the water through the machine until the blockage cleared.