Machine stops mid-brew and lights flash; capsule area may be flooded with water

Safety first: Unplug the machine and allow it to cool. Hot water and sharp piercing needles are present.

Non-invasive steps:

• Run a full descaling cycle using Nespresso-approved descaler to clear scale from the thermoblock and internal tubing.
• After descaling, run several large-cup rinse cycles without a capsule to flush debris.

Cleaning the capsule area:

• Open the lever and remove any capsule.
• Inspect the capsule piercing plate and needles for coffee residue or foil fragments.
• Use a soft brush and a damp cloth to clean the piercing area. For stubborn clogs, use a wooden toothpick carefully to clear the holes (never use metal that can damage or enlarge the jets).

Advanced checks:

• Remove the top cover to access the brew head outlet and flow restrictor (small plastic or metal insert in the outlet line).
• Disconnect the outlet tube and check for blockages; flush with warm water.
• Inspect the overpressure valve near the pump; ensure it is not stuck closed by gently moving it (if serviceable) or replacing it if defective.

If the machine continues to show Error 3 after thorough descaling and cleaning, the internal tubing or thermoblock may be severely obstructed and require replacement.