Senseo coffee maker beeps and shows error 2 or two flashing LEDs; machine will not start brewing.

Safety first: Unplug the machine before removing the water tank or accessing internal parts.

• Check water tank: Remove the tank, fill it to at least the MIN mark with fresh water, and reseat it firmly until it clicks into place.
• Inspect float: Look inside the tank for the small plastic float. It should move freely up and down. If stuck, rinse the tank with warm water and mild detergent, then flush thoroughly.
• Clean tank magnet area: Wipe the side of the tank where the float magnet sits and the corresponding area on the machine body to remove scale or debris.
• Descale inlet: Run a descaling cycle to clear limescale from the tank outlet and inlet valve. Follow Senseo’s descaling instructions.
• If still in error: The internal reed switch that senses the float magnet may be defective and requires replacement by a technician.