Beater bar has been rattling when running the vacuum. Stopped working all together today while vacuuming.

Start be cleaning the beater bar.

Up to my experience in my Panasonic vacuum cleaner, if the beater bar is not working this could be because the 'Carpet/Floor' selector switch is in the 'OFF' or 'FLOOR' position. In both of these positions the beater bar will not rotate. Move the selector switch to the 'CARPET' position. When in this position the beater bar will rotate once the foot pedal is pressed.

If the selector switch is in the 'CARPET' position and the beater bar is still not rotating it could be that there is something entangled in the beater bar, or the belt is worn or broken.

To check this first unplug the vacuum cleaner

Inspect the beater bar and belts to ensure that there is nothing entangled in the beater bar and that the belts are intact and are not excessively worn. If the belts are excessively worn they may slip resulting in the beater bar not rotating.

The vacuum cleaners often have an overload protection system inside the nozzle, which stops the nozzle motor when the beater bar jams to prevent belt breakage. After clearing any lint build up or jamming you may need to reset the overload protection, by pressing the reset button on the top of the floor nozzle.

Not sure how I can help, as it seems you know what the problem is! Fit a new brush bar! On some Dyson models (not sure if the DC17 is one of them) you have to fit a new sole plate at the same time - they are supplied together as a kit. Good luck.

The belt doesn't have to be broken to make the vacuum not work correctly. If the belt is stretched the vacuum won't operate the way it is supposed to. You can get replacement Dyson Belts here:

Dyson Replacement Belts

Hi, You can take care of both things at once. Here's how:
Unplug and flip your vacuum over, beater bar side up. Remove the cover base plate that surrounds your beater bar. It's held on with either clips or screws, and usually "hinges" toward the front of the vacuum to release when the clips/screws are undone. Remove the base plate. The beater bar sits in sockets where it fits into the vacuum. Pay particular attention to how it comes out as you remove the beater bar, so it will be much easier to put it back together. If your belt is good, it will want to come off with the beater bar, but will remain attached to the motor. If necessary, slip the belt off of the beater bar. Behind the beater bar, you'll see a cavity. This is where the vacuum pulls the dirt from the beater bar. Look up into the cavity; stuff almost always hangs up in there. Remove any debris that you can find. While you have your beater bar out, look at the ends, where it fits into the sockets. Hair and other material catches on the beater bar and winds around it. If it is in and around the sockets, it causes the vacuum to have to work harder to clean. Remove any debris that you find on either end. Get your new belt and place it on the motor shaft. Slip the beater bar into the belt, and install the beater bar and sockets back into the vacuum frame. It takes patience so don't worry if it takes a few tries to get it right. Once in, test your work by revolving the beater bar a bit with your hand. You should be able to feel the tension of the belt as it turns the bar and the motor shaft. Take one more look at the sockets, just to be sure that they are in the proper place, and that the beater bar is level in the frame. Reinstall the base plate. This should have you finished at this end.
Best regards, --W/D-- please feel free to rate this solution! Thanx!

The All Floors model has a protective belt clutch system and the rattling sound means the clutch has slipped. This would have to be repaired officially by a Dyson repairer.

All beater and rotating brush bars are fairly easy to get to with a couple of screw on the bottom of your wan. They are driven by a belt and these belts come off, break, or the bar itself is stuck with rug material. Unplug your vacumn and get our screwdriver. It;s easy to figure out once inside the wan.

hi welcome to fixya you need to replace belt if belt is ok than you burnt out the motor please check belt first as it is cheaper thank you for useing fixya please rate

Does the power head motor stop, or does the brush roll stop. If it is the brush roll stopping, replace the belt and/or the brush roll. If it is the motor, you may need to clean out around the motor, it may not be getting enough air to cool causing it to overheat and stopping. That the brush roll plate off, take out the screw, and the top will come off, then you can check to see if cleaning is the answer, if not, the motor may be bad.

Belt jumped off beater bar and jammed it! Disconnect belt, does imotor run. If yes, reconnect belt turning beater bar by hand to see if it is smooth. Carefully, reassemble and run it!