The roller brush on my Roomba 4150 will not spin with the rubber brush

SOURCE: Brushes not spinning....

My status light came on, the vac beeped twice and stopped. I noticed my brushes weren't spinning. I took an eyeglass screwdriver and took off the center screw that holds on the brushes. I cleaned the shaft that the brushes spin on. replaced brushes and it works great! I just did this now and it is still running. my status light problem is fixed my roomba is 4 years old and I am on my 2nd battery. Seems to have fixed the problem. FYI it was wrapped with hair, dirt and it was greasy.

SOURCE: Roomba brushes won't spin

I had this problem with my Roomba Discovery. I ran across your question while searching for an answer. My main symptoms were, Roomba hesitated a lot, and the dust bin did not fill. I had plenty of hair wrapped around the brushes and against the filter.
I just finished taking my Roomba apart. I found the motor drive shaft had a LOT of hair wrapped around it and it had climkbed into my gearbox. I took that apart and cleaned all the hair out of the gearbox. My Roomba is back to normal now, filling the dust bin.

SOURCE: roomba keeps going around in circles

Dear Roomba Owner,

For solutions to your Roomba Vacuum Problems click on the following link @ http://homesupport.irobot.com/cgi-bin/irobot_homesupport.cfg/php/enduser/home.php?p_sid=gG54ERqj

jackiaria
This Will FixYa!
A Lot of iRobots' Home Vacuums Need a Software Upgrade!

SOURCE: brush roller on windtunnel won't spin

It sounds like you need to replace the actuator arm or the cable to it. Look for Hoover part 43143046 for a start. I've got a similar problem.

SOURCE: My eureka 5902 4D bagless uprights roller brush

The same thing happened to me about a year ago with this very model.
The issue on mine was a small, copper-colored metal wheel that attaches to the end of the brush roller. You'll need to remove the top cover (there are several screws).

Once it's off, you should see the belt, the beater brush, and the metal gear. The gear didn't fit correctly - so the motor just spins without moving the brush. I ended up going to the store and buying superglue that withstands high tempuratures, then gluing the gear to the motor's shaft... and hammering the thing into place before the glue 'set' too much. ...Not fun, but it's working and has been ever after. I can take photos of the thing if need be.