Vacuum runs but has very weak suction even with a fully charged battery.

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

• Empty and clean dust bin: Remove the bin and empty it. Wipe the interior with a dry cloth to remove fine dust.
• Clean cyclone assembly: Detach the cyclone (if removable) and tap it gently to dislodge packed dust. Use a soft brush to clean the cyclone cones and mesh.
• Check wand and floor head: Detach both ends of the wand and look through it. Remove any obstructions. Inspect the floor head inlet and suction channel for blockages.
• Clean or replace filters: Remove pre-filter and HEPA filter. Clean or replace as recommended by Tineco. Ensure they are completely dry before reinstalling.
• Inspect seals and gaskets: Check the rubber seals around the dust bin and cyclone. If cracked, flattened, or missing, replace them to restore suction.
• Reassemble and test: Reinstall all components firmly until they click. Test suction at the main body without attachments to compare performance.