Vacuum emits a burning smell or hot plastic odor during operation

Safety first: Immediately switch off the vacuum and remove the battery. Do not continue using the unit until the cause is identified.

• Check for blockages: Inspect nozzle, tube, hose, and filters for clogs. Clean or replace filters as needed.
• Inspect vents: Clean all air intake and exhaust vents around the motor housing with a soft brush.
• Smell source: With the battery removed, smell near the motor vents. A strong burnt electrical smell suggests motor damage.
• Test briefly: After cleaning and cooling, reinstall the battery and run the vacuum for 10–20 seconds. If the smell returns quickly or you hear grinding, stop using it.
• Replace motor unit: A motor that has overheated enough to smell burnt is usually near end of life. Replace the motor assembly or have the unit serviced by Bosch.