Display shows E3 and the coffee maker shuts off shortly after starting a brew cycle.

Safety first: Unplug the coffee maker and allow it to cool before handling the base or internal tubing.

External cleaning:

• Remove the water reservoir (if detachable) and rinse thoroughly. Check the outlet at the bottom for debris or coffee grounds.
• Use a small brush or toothpick to gently clear the reservoir outlet and the inlet port on the coffee maker body.

Descale the internal water path:

• Fill the reservoir with a 1:1 mixture of white vinegar and water.
• Start a brew cycle and allow about half the solution to run through, then pause or turn off the unit for 20–30 minutes to soak.
• Resume the cycle to complete the descale. Then run 2–3 full reservoirs of clean water to rinse.

Internal checks (for advanced users):

• Remove the bottom cover to access the aluminum heating tube and silicone water hoses.
• Inspect hoses for kinks or blockages. Detach hoses one at a time (note their positions) and blow through them to confirm they are clear.
• On models with a flow sensor (small plastic wheel or sensor in-line with the water tube), check for mineral buildup or stuck impeller. Clean gently with warm water and a soft brush.

When to replace:

• If the flow sensor impeller is seized or the sensor is cracked, replace the flow sensor assembly specific to your Black+Decker model.
• If the aluminum heating tube is heavily scaled internally and cannot be cleared by descaling, replace the heating element / boiler assembly.

Note: Some basic models do not have a flow sensor; in those units, persistent E3 after descaling usually indicates a failing control board.