Vacuum has very weak suction even though the motor sounds normal.

Safety first: Turn off the vacuum and remove the battery.

• Inspect dust cup and cyclone: Empty the dust cup and remove the cyclone unit. Clean the mesh screen and internal cones with a soft brush.
• Clean pre-motor filter: Remove the pre-motor filter, tap off dust, and rinse if allowed by the manual. Let it dry completely before reinstalling.
• Check seals and gaskets: Examine the rubber gasket around the dust cup and cyclone. Ensure it is not twisted, torn, or missing. Reseat the dust cup firmly until it clicks.
• Check for leaks: Assemble the vacuum and run it while feeling around joints (dust cup, pipe connections) for air leaks. If a joint is loose or cracked, the related component should be replaced.