The brush wouldn't work when the selector switch was in carpet mode. Took the power head apart and removed the motor. Everything o.k. in the power head. Checked and found that the neutural wire had pulled out of the connector, the connector was never crimped at the factory. What a day! Took 2 hours and a large pizza to get it done. Neutral wire was in the hose just below the handle. Reconnected the wire and crimped it, put everything back together. It works!!!!

It's an issue that the front roller isn't engaged. there's usually a belt connected to the roller on one side of it. That belt is connected to the same motor that develops the suction. You have to find that area and either pull the belt over the motor and/or the brush. Close it back up and turn it on again.

DC25s are not Hoovers, they are Dysons. And they are terrible vacuum cleaners. We see more DC25s for repair than all the other Dysons. Toss it and buy a Miele or Sebo.

Have you checked the electricity is getting to the motor? You can replace the motor if necessary.

The belt is stretched and needs replacement.(Belt # 38528036) . The brush is not turning against resistance.

therre are usually aprings that hold the brush in position or a spacer thaqt turns when you adjust the height. turn the vacuum over and remove the plate covering verything. make sure your unplugged first. it usually takes about 5-6 phillips head screws. look for loose ,broken or missing parts. make the the roller is taken out and is carefully cleaned of all hair etc esp that just at the edge of the roller where it meets the monting devices. the hair and debris often gets stuck there and once removed works much better. also make sure the belt is not stretched and is slipping on the brush. if it is replace it. good luck.carefully reassemle the parts you removed being very aware of what postiotn everything was in when you took it apart. make sure everything has proper clearance and then test your vacuum. if you find broken or missing parts replace them first ofcoarse.

Ok, I took it apart, cleared the clog out, and put it back together. It wouldn't switch to "carpet". Got no answer on my question. Took it apart again, only I went further. Took apart the bottom - brush out, all inside bottom parts out, cleaned all that part of vac. No clogs down there. Ran the carpet/bare floor switch back and forth several times while I had it apart. Put it all back together and it worked fine. Still didn't find a fuse or reset button...

You really need to take the sole plate back off and make sure the belt is running exactly where it's supposed to go and not looped over a piece of plastic or anything. More important is that you make sure the ends of the brush are seated properly and the bearings the brush is mounted to are clean and rotate freely. Look at each component and make sure they are assembled perfectly. Make sure a plastic ring or piece that goes on the end of the brush didn't get dropped under a piece of furniture and you forgot about it. If the problem keeps happening, take the brush and belt back out and carefully turn the machine on to see if it makes the sound. If it doesn't make the sound with the brush out, the problem is with the brush assembly. If it does make the sound, the clutch that turn the brush on and off is damaged and needs to be replaced. You can order a new clutch assembly and replace it without much trouble. They want you to think you can switch between floor and carpet settings all the time but it's really really stressful on that clutch to switch between settings with the motor running. Think about how powerful that motor is. Think about the poor unassuming brush assembly being jerked to life by that powerful motor running at full speed. I've seen that destroy a clutch in about two years. Anyway, it's much better for the life of your dyson to turn the motor off when you switch to carpet mode (when you turn the brushes on). You probably don't have to bother turning off the motor when turning the brushes off, or switching to bare floor mode, because it's not that stressful on the mechanism to just disengage the running motor.

Depending on the model you may have a single or two motor system. If it is not running well in carpet mode but still has suction check to see if the brush for the carpet head is turning. If not look for a red reset switch or spin the brush when the vac is shut off. It it spins freely the belt is either broken or badly stretched and needs replacement.

there is a belt in the nozzle that is driven by a small motor in turn will drive the roller when set to carpet. did you completely dis-assemble the nozzle? ie, to remove the roller and clean the endcaps? this would also show the belt. The gear on the motor wears very easily and could also be worn. I would change the nozzle or get a new Flair. new nozzles cost about $25-$30.

I’m happy to assist further over the phone at https://www.6ya.com/expert/robert_b96ba3f038cf317c

when you install the hose connector it trips a switch that switches the vac motor into high speed because the vac path is longer using the hose. check the belt after you remove the front. make sure the direction of rotation is in the direction of belt travel stamped in the impeller. try adjusting the head height