A:Answer Hello, thank you for your inquiry. We are sorry for the inconvenience, this could be troubleshooted by removing the charcoal filter from the tank, filling it halfway and pulling up and down repeatedly to push water into the machine. Try this with the machine being turned off, repeat the same process up to 5 times if needed and the error persists, feel free to contact our chat specialists at www.braunhousehold.com for more assistance.