Display shows E10; machine may not detect water level correctly, refusing to brew even with a full tank.

Safety first: Disconnect power before inspecting the water tank area.

Step-by-step checks:

• Inspect water tank float: Look for a small plastic float or magnet inside the tank. Ensure it moves freely up and down. Clean any scale or debris.
• Check tank seating: Reinsert the tank firmly until it is fully seated. A partially inserted tank may not trigger the reed switch.
• Test without filter: Remove any AquaClean or Brita Intenza filter and test the machine. A misfitted filter can prevent the tank from seating correctly.
• Clean tank contacts (if present): On models with electrical contacts, wipe them with a dry cloth.

When to call a technician: If E10 remains, the internal reed switch or level sensor may be defective and requires replacement by a service center.