Cordless vacuum shows E12 and the dust bin full indicator stays on even when the bin is empty

Safety first: Remove the battery and dust bin before cleaning sensor areas.

• Clean bin and sensor: Empty the dust bin completely. Look for a small window or sensor opening near the bin or cyclone. Gently clean with a dry cloth or soft brush to remove fine dust.
• Check bin seating: Reinstall the dust bin, ensuring it clicks firmly into place. A misaligned bin can prevent the sensor from reading correctly.
• Inspect wiring (advanced): If accessible, trace the sensor wires from the bin area to the main PCB. Ensure connectors are secure and wires are not pinched.
• Test operation: With the bin properly installed and clean, power on the vacuum. If E12 persists, the sensor itself may be defective and require replacement.