Intro: A burning smell from a vacuum is usually caused by blockages or belt issues.
1. Check the brush bar
Hair tangles cause friction.
2. Clear the hose
Blockages make the motor strain.
3. Clean the filters
Dirty filters overheat the motor.
4. Check the belt
A slipping belt smells like burning rubber.
5. When to stop using it
If the smell is electrical or the vacuum cuts out.
Summary: Most burning smells come from blockages or worn belts.