Brush bar only works for about a second

Hey, this is Leland with Crucial Vacuum,

If the brush bar is not working properly there may be several reasons.

Firstly, the motor may be the problem. If you hear any noises while the machine is running, you should contact the original manufacturer for trouble shootingsolutions.

Secondly, your vacuum may be in need of new parts. By changing either the brushroll or belts, you should be able to increase the quality of the suction.
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You can purchase replacement parts for the DC25 direct from Crucial Vacuum with freeshipping and an exclusive 10%coupon for Fixya.com readers, use code: FIXYA10
http://www.crucialvacuum.com/catalogsearch/result/?q=dc25

I hope this was helpful! If you would like further assistance, please feel free to give us a call at 877.750.9239. We have helpful and friendlycustomercare representatives on the line ready to assist you.

Are you sure that you have not set irt for hard floors, or that the nob for setting to hard floors is fully on or off for hard floors.