Originally Posted by kerry

My electric drip coffeemaker had stopped functioning. It was producing steam and not much hot water. I figured this could only happen if it wasn't getting enough water. But the reservoir was full. After disassembly I discovered a vinyl hose connecting the reservoir with the heating element. Inside the vinyl hose were two little rubber valves which I assume are there to stop the hot water from going back into the reservoir, forcing it to expand up the outlet. Inside one of those rubber valves was a relatively large piece of unground cofffee bean, hindering the flow of water into the heating element.
Back to good coffee in the morning.