Coffee Machine Repair and Maintenance – Why Coffee Machines Break and How to Prevent It Automatic coffee machines are very convenient — press one button and get espresso, cappuccino or latte. But inside, a coffee machine is a complex device with a pump, boiler, valves, grinder, brew unit and electronic control board. Like any equipment, coffee machines require maintenance and sometimes repair. In this article, we will explain why coffee machines break, the most common problems, and how to extend the life of your coffee machine. The Most Common Coffee Machine Problems Coffee machine not pumping water This is one of the most common issues. Usually caused by: Scale buildup inside the system Faulty pump Blocked valve Air in the system Internal leak If the machine is noisy but no water comes out, the pump is usually working but the system is blocked. Coffee machine leaking water If you see water under the machine, possible reasons: Broken hose Worn seals Cracked boiler Broken valve Br...