Cordless vacuum shows F3 and suction is reduced or unit pulses on and off

Safety first: Remove the battery and empty the dust bin before clearing blockages.

Steps:

• Empty and clean bin: Remove the dust container, empty it, and tap the cyclone shroud to remove fine dust. Use a soft brush to clean the mesh.
• Check wand and hose: Detach the wand and any hose. Look through them against the light. Use a broom handle or flexible rod to gently push out any clogs.
• Inspect floorhead: Remove the brush bar and check the neck and internal channels for blockages (e.g., tissue, pet hair clumps). Remove all debris.
• Clean filters: Clean pre-motor and post-motor filters as per the manual. Ensure they are completely dry before refitting.

After clearing: Reassemble and test. If F3 still appears with clear airflow, the pressure sensor or PCB may be faulty and require service.