What is the Kirby vacuum burning smell?

The burning smell from a Kirby vacuum often indicates that the motor is overheating, typically due to a blockage in the airflow, such as a clogged filter or hose. It can also be caused by a worn belt or debris caught in the brush roll. If you notice this smell, it's essential to stop using the vacuum immediately, check for obstructions, and ensure all components are functioning properly to prevent damage. Regular maintenance can help avoid these issues.