The display shows E4 and the brush bar will not spin; suction from the main body is normal.

Safety first: Turn off the vacuum and remove the battery. Never work on the brush bar while the unit is powered.

• Step 1 – Remove the brush bar: Unlock the brush bar access (usually a side cap or bottom plate). Slide the brush bar out of the floorhead.
• Step 2 – Clear debris: Use scissors to carefully cut away hair, threads, and fibers from the brush and especially from the ends near the bearings.
• Step 3 – Check bearings: Spin each end of the brush bar by hand. If it feels rough, stiff, or seized, the bearings are worn. Replace the Tower brush bar or the complete motorized floorhead if the bar is not sold separately.
• Step 4 – Inspect for obstructions: Look inside the floorhead housing for lodged objects (coins, stones, toys). Remove anything blocking the brush chamber.
• Step 5 – Test the brush motor: Refit the brush bar, reinstall the battery, and briefly power on. If the brush still does not rotate and E4 returns, the internal brush motor or PCB is likely faulty.
• Step 6 – Replace floorhead: Replace the complete Tower motorized floorhead assembly if the motor is burnt or non-functional.