DeLonghi · ESAM4200 Espresso Machine
This light indicates that the water tank is either empty, not inserted correctly, or has accumulated lime scale or dirt.
Click steps to track your progress.
Fill the water tank with fresh water.
Insert the water tank fully into its compartment until it clicks into place.
If the tank is dirty or has scale, remove it, rinse it thoroughly, and if necessary, descale it following the machine's descaling instructions.
Ensure the tank's filter (if present) is clean and unobstructed.