Display shows ADD WATER or a water droplet icon and brewing will not start.

Safety first: Unplug the coffee maker before removing the reservoir or accessing internal parts.

Basic checks:

• Remove the water reservoir and fill it to at least the minimum brew level indicated.
• Ensure the reservoir is seated fully and correctly; misalignment can prevent the level sensor from reading properly.
• Check for debris at the reservoir outlet and the inlet port on the machine. Clean with warm water and a soft brush.

Float / sensor inspection (if equipped):

• Look inside the reservoir for a float (small plastic piece that moves up and down). Make sure it moves freely and is not stuck by scale or residue.
• Clean the float and its guide with vinegar and water if it is sluggish.

Internal level switch (advanced):

• Some Black+Decker models use a magnetic reed switch or electronic level sensor inside the body.
• Remove the side or bottom panel to access the sensor. Check wiring connections and look for corrosion.
• Test the reed switch with a magnet and multimeter; it should open/close as the magnet (float) moves.

When to replace:

• If the float is waterlogged or cracked, replace the water reservoir assembly.
• If the reed switch or electronic sensor does not respond, replace the water level sensor or control PCB as specified for your model.