Why does my vacuum cleaner smell of burning when I switch it on?

A burning smell can mean the motor is under strain, a belt or brush is jammed, or dust has built up where it should not. Switch it off at once, unplug it and do not use it again until the cause is clear. If you see smoke or the cord, plug or housing looks damaged, stop using the product immediately.

1. Check the dust container or bag and empty it if needed. Expected result: the cleaner should no longer work as hard to move air.
2. Inspect the filter, hose, tube and brush head for blockages or wrapped debris. Remove anything you can safely reach. Expected result: airflow should become freer and the smell may reduce.
3. Confirm that the brush turns freely and is not jammed by hair or fibres. Expected result: the floor head should move without resistance.
4. Leave the appliance unplugged and allow it to cool completely before testing again. Expected result: a brief warm smell from heat buildup should disappear once cooled.
5. If the smell returns quickly, or if there is any smoke, crackling or visible damage, stop using the product and contact the retailer or store where it was purchased.

Never ignore a burning smell, even if the cleaner still appears to run. That symptom can point to a serious electrical or mechanical fault and is not suitable for continued use. Generic troubleshooting.