Why won't the beltless brush on vacuum agitate

SOURCE: Kenmore progressive upright, beltless vacuum, the

They usually have belts for that kind of thing at walmart!

SOURCE: The brushes have stopped spinning. This is a

the brush spins on a bearing, you might want to get to the bearing and make to it has not cracked or broken.

SOURCE: Kenmore Model 116 upright beltless vacuum, agitator will not turn

I had the same problem. The agitator stopped turning after I sucked up a foreign object (my wife's watch) and it got jammed in the intake. After removal of the watch the agitator did not spin when turning on the machine, and the reset button never deployed (it remained buried in its housing and would not depress with a paper clip). The agitator was not bound and I could manually move it in both directions with ease. Faced with prospect of paying $125 or more for a repair, a good sharp kick to the chassis from the top promptly fixed the problem. I have found that kicking malfunctioning electronics often works.

SOURCE: I have a model 116.35922 beltless drive vacuum.

I just had the same problem. The roller will not turn if the unit is overheated. I discovered that my bag was too full. I changed the bag then the roller started turning again. I don't know if this is true cause and effect, but it couldn't hurt to try.

SOURCE: brush on progressive beltless vacuum

Before you replace any parts, I recommend that you unplug the vacuum cleaner and remove the lower plate as shown in the first image below. Check for a build-up of hair or lint on the agitator end cap assembly that could be causing excessive friction. This could prevent the agitator from spinning properly and would overheat the motor. In this situation, the motor overload and thermal protector could be working properly and simply opening to shut off the motor when it overheats. You can use the procedure for removing the agitator/motor assembly if necessary to thoroughly check and clean the end cap. Check for any damage to the end cap or motor supports. If you find damaged components, they will need to be replaced.You can view a parts list diagram for this vacuum cleaner at partselect.com Use your full model number (116.35922500) to access the diagram and listing for your vacuum cleaner.
If you find no problems, I recommend that you reassemble the unit and test it. When the motor cuts off, check it to determine if it is apparently hot. If it is, then you will likely need to replace the motor (part 81922670).
If the motor is not hot, then you could have a failed thermal protector (part 8192229) that is opening prematurely. You could also have a failed motor overload (part KC76KCJNZ000). A technician would normally check the continuity through these components to determine which one has failed in this situation. I provided a wiring diagram in the second image below in case you need to check these components. I also provided a wire routing diagram. It is extremely important that all wiring is routed properly to prevent the pinching and shorting of wires. It is unlikely that you will need to check these components but the information is there if you need it.