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The easiest one is that the brush has hair and fluff wrapped around its bearing. This happened to me and was causing a burning rubber smell. Turn it over and remove the base plate. Lift the belt by putting a piece of cord under it and slide the brush out. Remove one end of the brush and slide the spindle out. Clean all the hair out and reassemble.
The internal drive belt is worn, or the nylon bush that it runs on.
The clutch is worn out.
The last two are not as easy to fix as the main drive belt is enclosed in the centre of the clutch. There are videos though that show you the process. Have a read and a watch, but try my first tip first.
Brush bar not rotating - Dyson
www.dyson.co.uk/.../brush-bar-not-rotatingBrush bar not rotating. ... to ensure vacuums containing Dyson Cinetic™ science maintain constant suction. ... tested at the cleaner head.
DC40 is a powerful mid-size Dyson upright vacuums, and we wouldn't expect you to have any concerns about performance on hard flooring or carpet. As long as the machine is used and maintained as described in the User guide we would not anticipate a change in performance, and we're on hand to help if Dyson owners need assistance.
It's important to note that for effective pickup, the cleaner head needs to form a close seal with the floor surface. Simply placing a hand under the cleaner head does not give an accurate idea of suction as you're not creating a seal, as you would be when you place your hand right across the end of the wand or hose. If you turn on and recline the vacuum, turn off the brush bar then lower the cleaner head onto something like a sheet of newspaper, you should see the newspaper held tightly against the soleplate by the vacuum's powerful suction.
We're keen to discuss this with you, and to help ensure your DC40 is working as well as it should be. Please email your full contact details to my colleagues at askdysonUS@dyson.com, and one of our experts will be in touch as soon as possible to provide further assistance.
If your DC39's brush bar won't rotate, but you're confident your vacuum has strong suction, we'd be keen to take you through some further troubleshooting checks when you have your machine to hand. If we can determine that there's an issue with the Triggerhead floor tool itself, we can confirm if we can replace this for you under the free Dyson parts and labour guarantee.
When you have a moment, please give us a call on 0800 298 0298 (UK), 1-866-693-9766 (US), 1-877-397-6622 (CA) or 1800 239 766 (AU) so we can provide further assistance.
Sorry to hear you're having difficulties with your DC14. Please note, the brushbar will never rotate when the cleaner is standing in the upright position, or if you have the brush control set to 'Hard floors'.
However, if you find the brushbar won't rotate when you've reclined the cleaner into the vacuuming position, and have the brush control set to 'Carpets', it's probably best if you get in touch with us directly. One of our experts will be happy to run through some troubleshooting over the phone with you, and recommend the best course of action. You can call us free on 08002980298 (UK), or 1866MYDYSON (US).
The advice we'd recommend would depend on the model of Dyson cleaner you own, which you haven't specified in your question. As a general rule, on most Dyson upright models, the brushbar is designed not to run when the cleaner is standing in the upright postion. However, the suction motor will continue to run, to allow you to use the hose, wand and dusting tools.
If you're concerned about your cleaner, it's probably best if you get in touch with us directly, so one of our experts can run through some troubleshooting over the phone with you, and recommend the best course of action. You can call us free on 08002980298 (UK), or 1866MYDYSON (US). We'll look forward to hearing from you.
Sounds like you have two separate problems here. If the brush bar does not rotate, probably the belt is broken. This is easily replaced, but you need to be precise about which model you've got so you get the right belt.
Loss of suction is due either to a blockage or, quite often, to a split in the short length of clear plastic hose that leads back from the brush bar enclosure. Repair is possible but replacement is better.
If you need more help, post here again.