Cordless vacuum runs but suction is very weak, and an E3 or similar suction fault indicator appears on the handle or battery display.

Safety first: Turn off the vacuum and remove the battery before disassembling the bin or filters.

• Empty the bin: Release the dust container and empty it fully. Wipe the inside with a dry cloth to remove fine dust buildup.
• Clean the pre-motor filter: Remove the foam or fabric filter located above or behind the bin. If the Bush manual allows, rinse it under lukewarm water until the water runs clear. Squeeze out excess water gently and allow it to air-dry for at least 24 hours before refitting.
• Inspect the cyclone: Remove the cyclone unit and check for compacted dust in the small cyclone holes. Tap gently to dislodge dust. Use a soft brush to clean the mesh screen.
• Check the wand and tools: Look through the metal or plastic extension tube and flexible hose (if fitted) for obstructions. Remove any blockages carefully.
• Check seals and gaskets: Inspect the rubber seals between the bin, cyclone, and main body. If a seal is torn or missing, unmetered air can reduce suction and confuse the suction sensor. Replace damaged seals if available as spare parts.
• Reset and test: Reassemble, reinstall the battery, and run the vacuum. If E3 persists with clear airflow and clean filters, the suction sensor or main PCB may be faulty and require replacement.