I borrowed a bissell 9500. It was filthy with the previous user's debris, including long and short black hairs, black goo from the swamps of hell, cat hair and dirt. I cleaned the whole machine (as mentioned in the online user's manual), pre-spotted my carpets, filled the appropriate fluid containers, and confidently turned power on to the 9500. The BRUSHES DIDN'T WORK ! After checking all belts, and other things mentioned in other solutions here on Fixya, I decided to check the trigger setup on the handle part of the cleaner. I unscrewed all the screws from the top of the handle down to the attachment holder ( there were seven screws). After that, I gently pried open the top portion of the handle in order to see down to the trigger. I gently pulled the trigger and, at the same time, repositioned it and the spring attached to it. Then, I put the screws back in, attached the power cord, turned on the power, released the handle's upright lock. When I did that, the brushes turned like they are supposed to. At that point, I felt like I'd awoken from a nightmare and, at the same time, been blessed by an unseen cosmic power. The rest is history. My carpets and upholstery are now as clean as when they were new. I hope this helps one or more of you out there with the "dead brushes" problem.
A solution submitted by:
Pierre Kunde[email protected]