Hi there, it's Jack at Dyson.
DC33 is suitable for cleaning hard and carpeted floors. It includes a brush control system which allows you to shut the brush bar off when cleaning hard floor surfaces. It's worth checking that the brush control is set correctly - it's possible it may have been inadvertently set to 'Hard floors'. For the brush bar to rotate, it must be set to 'Carpets':
It's also important to note that the brush bar will not rotate when the vacuum is standing upright, so make sure you recline it into the normal vacuuming position before testing it.
If this doesn't resolve the issue, please turn off and unplug the machine, then check that there are no obstructions in the cleaner head which could be jamming the brush bar. Remove any threads or hair around the brush bar, as these can affect the performance.
If you'd like further advice from our experts after you've given this a try, please call us on 0800 298 0298 (UK), 1-866-693-9766 (US), 1-877-397-6622 (CA) or 1800 239 766 (AU). We can take you through some diagnostic checks to determine what may be causing the issue. If a repair or replacement part is needed, we can also confirm if this is covered under warranty.