It smells like the belt is burning. What is wrong?

How to avoid your belt burning.

It is likely the belt isn’t turning freely on the brush roll. Flip out the belt lifter handle and turn it clockwise until the green arrows line up. This will release the belt from the hook in order to turn freely on the brush roll. Make sure to check the brush roll for tangled hairs or debris that may be preventing it from turning.

Buy Replacement Kirby Vacuum Belts