The display shows "FL," and suction is significantly reduced; the vacuum may pulse on and off.

Safety first: Turn OFF the vacuum and remove the battery before cleaning the dust container.

• Empty dust bin: Detach and empty the dust container completely.
• Clean sensor area: Locate the dust level sensor window or optical sensor (if your Sencor model has one) inside the bin or cyclone area. Wipe gently with a dry, soft cloth.
• Clean cyclone: Remove the cyclone assembly and tap out dust. Use a soft brush to clear the cyclone holes.
• Reassemble: Refit all components securely and test. If "FL" still appears with an empty bin, the sensor may be faulty and require replacement.