Vacuum shuts down with “Err 4”; unit may feel hot to the touch, especially near the motor vents.

Safety first: Turn the vacuum OFF, remove it from the charger, and allow it to cool for at least 30 minutes before further inspection.

• Let it cool: Place the vacuum in a cool, dry area away from direct sunlight until the housing no longer feels warm.
• Clean all filters: Remove pre‑motor and HEPA filters. Tap gently to remove dust. If washable, rinse under lukewarm water until clear, then air‑dry completely (24 hours) before reinstalling.
• Check airflow paths: Inspect the wand, hose, and nozzle for blockages. Even partial clogs can cause overheating. Remove any debris.
• Inspect vents: Use a soft brush to clean the motor exhaust vents on the body. Do not poke deep into the vents with hard objects.
• Use lower power modes: After cleaning, run the vacuum on a lower power setting for a few minutes and monitor for heat buildup.
• Service motor if overheating persists: If Err 4 recurs quickly even with clean filters and clear airflow, the motor’s internal thermal sensor or windings may be failing and the motor assembly should be replaced.