Question about Dyson Vacuums
If the screeching noise is happening at all times, it is most likely a motor failure; which unfortunately can only be resolved by complete replacement of the motor.
If it's a loud ratchety-screeching type sound, and is only occurring when the brush is set to carpet, it is most likely due to an obstruction of the brushroll or a problem with the clutch. Ensure that the brushroll can spin free, look for anything physically blocking it. Check the bearing ends on the brushroll, they can melt and cause the brushroll to not spin effectively. If neither of those two things resolves the problem, the clutch most likely needs replacement.
Posted on Jul 31, 2008
I have had this problem on two dysons and have solved it by replacing the so called lifetime pre-filter. The problem is not the washable blue sponge but the material gauze filter in the plastic surround.
To see if this is your problem try removing the whole filter (i.e. the filter with the blue sponge inside - you need to remove both bits not just the sponge).
If you do a quick vacuum test for a few minutes then see what effect this has on the suction.
If you need a new part try somewhere like here (you'll need to chose for the right model) : http://www.espares.co.uk/part/dyson/dc07/p/1086/716/6/420625/875479/lifetime-pre-motor-dyson-.html
As I say this has fixed both of mine.
Posted on Nov 11, 2008
I would make sure it is the motor first by isolating the sounds to just the motor. Take off the dirt cup, both filters, and belt, then run it and see if the sound is still there. If it is, you need a new motor. If it isn't, you need to look for a clog, or bad roller bearing.
To take the motor out first undo the wiring running down the backside of the unit inside of the switch housing. Then take the four screws out that hold the outer motor housing on, and the rest pops apart. Once you get inside, the gaskets make it a really tight fit, so you might have to hit the motor shaft with a rubber mallet to get it out and use penetrating oil on the bottom gasket to get the new motor to slide back in.
I guess there is no easy explanation. Let me know how it goes.
Posted on Dec 01, 2008
Hi its Darran at Dyson.
From your description of the problem, it sounds as though the wand/hose is blocked. To check this, remove the wand/hose assembly from the machine, switch it on and test the suction from the top of the wand with your hand. If the suction is poor, remove the wand from the hose and test the suction from the top of the hose. If its good here, then you know that the wand handle is blocked.
For the full diagnostics, check out the Support section on our website at www.dyson.com or call our Helpline on 1866MYDYSON.
Dyson Customer Service
Posted on Apr 20, 2010
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