Hi, my dc07 cleaner has developed a very high pitch screech its not a constant sound but intermittent and last for a second or two and is very unpleasent, its a loud cleaner anyway but this noise is so loud when it happens it hurts your ears.Any ideas?

Sounds like the vacuum motor has a bad shaft bearing.

Hi there, it's Jack at Dyson.

The type of belt mechanism will depend on which model of DC07 you own. If you have a DC07 machine without the brush control feature, the user-replaceable belt is located within the cleaner head:
http://www.dyson.co.uk/support/dc07/dc07-standard/maintaining-your-dyson-machine/change-the-belt1/belt-fitting-preparation

However, if your DC07 includes the brush control feature (you should see the Carpet/Hard floor dial on the cleaner head), your machine will use a clutch mechanism with belts engineered to last for the lifetime of the machine in normal use.

If you have a DC07 with brush control and would like some help with it, please contact us directly by calling 0800 298 0298 (UK), 1-866-693-9766 (US), 1-877-397-6622 (CA) or 1800 239 766 (AU).

Hi,

Switch the machine off at the wall. Take plug out the socket.

Take a 2 pence peice and unscrew the 3 plastic screw on the bottom. In here you will probably find a build up of dirt etc. This dirt also gets into the fine tuning of the brushbar.

Take some WD40 and spray this on the moving partsm aking sure you het the edges, nooks and crannies.

It wont be a gasket problem - they don't tend to fail.
A high-pitched noise can be a number of different things. That is too vague to diagnose on here with the description you have given. Can you be more specific?

the high pitched whining is most likely the belt and it stops when you put the handle up because the roller bar is not engaged when you put up the handle.If it is the belt making that noise it will most likely break soon and you will need to put a new one on. Hope this helped...good luck

Most likely, there's something in the dirt tube. Ic could be something like a piece of paper or cellophane, vibrating from the air going over it. without hearing it, a high pitch noise could be different things.

Sounds like a bad motor. Could be either foot motor or main motor either way cost will be more than half of the unit.

Sounds like a bad motor bearing. If it is, then you would have to replace it. Could be the brush roll, did you check the ends to make sure they turn easily?

For the handle problem, detent lever part #2030052 and costs $4 to $5. A bearing in the motor is what is making it sound bad, part #2032211 and will cost around $60. You could try bissell.com or call them. They can at least let you know who has Bissell parts near you.

Sounds like you have a clog. Make sure the filters are clean, replace if it has been more then a year, check the inlet down by the brush roll, your clog maybe there.