Machine displays 'Fill water tank' even though the tank is full.

Safety first: Unplug before inspecting sensors.

• Check float: Remove the tank and verify that the internal float moves freely. Descale the tank if it is stuck.
• Clean sensor area: Wipe the clear window or sensor area on the machine where the tank sits.
• Use original tank: Ensure you are using a genuine SMEG water tank.
• If still not detected: The internal sensor may be faulty and require replacement.