If the brush is not rotating, please remove the access plate and inspect the brush and brush belt. If the brush belt is broken or stretched, it will need to be replaced. You can order one online at http://www.bissell.com If something gets caught in the brush and prohibits it from turning, it may cause the brush belt to slip off. If the brush belt has slipped off but appears to be intact, you can replace it by looping it over the motor shaft. The BISSELL PowerGlide Platinum and PowerTrak vacuums use a Style 7 belt. Style 7 belts can be purchased at most large retailers and can also be ordered from BISSELL Consumer Services either online at http://www.bissell.com or by calling 1-800-237-7691, Monday - Friday, 8 a.m. to 10 p.m. or Saturday, 9 a.m. to 8 p.m. ET.