Question about Dyson DC08 Cylinder Bagless Canister Cyclonic Vacuum

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Dyson DC08 Poor suction Even after filters are cleaned,no pipe blockage,no splits Thanks Anne

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  • berg01 Nov 24, 2008

    Exactly - got to buy another vacuum cleaner if no solution.
    I have cleaned all Filters, checked the pipes and the hose - everythng is OK.
    I also tried without the dust container to clos the hole to the motor by hand and found high vacuum - but when using the full system there is almost nothing at the end of the nozzle.


  • Anonymous May 02, 2009

    same problem as above, it seems the head is not working properly. the brushes are not turning and no suction.

  • Anonymous Mar 28, 2014

    I have cleaned the filters and charged it

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I managed to take the cyclone apart. here is some help with what i did I hope this helps. You will need a philips and torx screw drivers. Especially torx with T - handles and thin shaft makes the task much faster and easier.
1. first undo the screws holding the top handle.
2. lift that part of the handle and pull towards the other end of the handle at the same time. Care this is a tricky manoeuvre but the other end is just sloted in. sometimes may be glued so some force may be needed. see photo 1
Dyson DC08 - 59cbdbc.jpg
3 Once the handle is off. there will be screw under the end that you pulled off. undo that screw. see photo



4. Now turn the cyclone upside down. Pull the cone off. this is only a push fit and should pull off

5. Now you should be able to see the three torx screws holes as indicated in the photo.38c6322.jpg

6 The removal of these torx will enable this section to be pulled off exposing one more layer with three further torx screws to be removed as indicated in the next photo7a60cdc.jpg
7 Once the final torx screws are removed, turn the cyclone upright and the top bit which held the handle should come off exposing the complex combe structure. see photo 92fa764.jpg
8 Then you should be able to lift the combe structure as well see phoDyson DC08 - 349cdfc.jpg="http://i.fixya.net/uploads/images/349cdfc.jpg" alt="349cdfc.jpg" class="h_mi" />

9. and final photo of all the part that Dyson DC08 - d6aa9d9.jpgpart d6aa9d9.jpg

10. Thoroughly was all the parts with water and make ABSOLUTLY sure that the part are dry before putting it altogather again. Your vacuum will be as good as new. mine was. good luck and happy cleaning.

Posted on Apr 11, 2009

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I found this on e-Bay. Pattern (non-Dyson replica) pre-motor filters are only a couple of quid so worth a try!

"A common problem found with the DC08 and DC11 cylinder cleaners is a notable loss of suction that seems to remain despite cleaning the filters. If you have such a machine and have noticed that the performance has dwindled, you might also detect a dull 'pop' approx 1 - 2 seconds after the appliance is started. This is the internal by-pass valve operating which is there to protect the motor from becoming starved of air. Instead of using just the suction air from the vacuum hose, the air is now coming into the machine from around the body. The problem lies within the pre-motor filter yellow casing which, unlike the older Dyson models, has a double low micron membrane which has a tendancy to clog once the micro-dust gets inside. This is great news until you actually want to wash the dirt out. The pores, once clogged are so efficient that even water cannot pass through them. A simple test is to first of all, fill the yellow filter with water (with the blue sponge removed) and hold it up. If the filter is clear, the water will run away, if not, the water will either slowly drip away, or may not even drain away at all. If you also hold the filter up to the light, you will see daylight through it if it is clear, and the extent of the blockage if not. There are only really two things that you can do. Either scrub away with an old toothbrush until you can get the water to run free through the filter, or replace it. Dyson DC08 pre-motor filter."

Posted on Apr 09, 2010

  • patricias919 Sep 04, 2010

    I took your advice but also got my husband to blow out the hepa filter with his compressor, without dismantling it.
    I can hardly believe the diference, the brushes spin easily again and it hangs on to the carpet and cleans like it should, thank you

  • jkankaanpaa Dec 19, 2010

    Thank you so much Johnboy, I had the suction loss problem too and I thought I had washed both of the pre-motor filters, since according to Dyson instructions you can like rinse them off and then you'll be fine again. Bah! The blue sponge maybe, but the other one enclosed in the plastic housing... after reading your tips I realised it was completely clogged with dust, no daylight showing through, and I went at it with a brush. With serious scrubbing I finally managed to get some of the dirt off, and after it had dried I put it back on. The performance was considerably better so it seems that was the root of the problem indeed. There's no way I'm going to get it all clean so I've already ordered a spare. The whole scrub/wash thing is quite poorly documented, and I think there are people at Dyson who deserve a stiff telling-off for this.

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There is a HEPA post-motor filter that Dyson claims is a lifetime filter that never needs cleaning or replacing. Their literature does not show how to access it but it is pretty easy by prying off the plastic cover which is hidden under the primary filter compartment.

However it will plug with fine dust that gets through or around the primary filter. The HEPA filter cannot be washed like the primary filter. If it is plugged you may have to buy a replacement. I was able to tear off the membrane that covers the pleated HEPA filter and that removed most of the dust plugging the machine. It works fine now but I will probably have to buy a new filter if it plugs again.

I am surprised no one has filed false advertising charges against Dyson. Their literature and even the printing on the vacuum boldly state that this is a lifetime filter and never needs cleaning. However they have the filter for sale if you call their 800 number and if you do a google search for " Dyson HEPA filter" you will find a lot of suppliers that sell replacements for this filter. Obviously there is a significant market for replacements clearly proving this filter does not provide a lifetime of service. When I called Dyson they said that they do not guarantee their "lifetime" filter will provide a lifetime of service.



Posted on Jun 16, 2009

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Also try taking out filters and see if sucks without them My dyson animal only works with the prefilter removed I put a new one in a no suction at all so worth a try

Posted on Jul 27, 2009

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The Cyclone is blocked - go to http://tinyurl.com/bgajnl and follow the instructions - you'll need patience and some "torx" screwdrivers, but afterwards your Dyson will be good as new. It's worth it.

Posted on Feb 02, 2009

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So much for never losing suction, huh?? Try the reset button.

Posted on Feb 29, 2008

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Thank you so much to solution number two guy. We did it and now I have a cleaner that works again after two years of moaning and changing filters. I hate to think how many Dysons broke to get to those helpful pictures. and to find the invisible screws. The holes at the top of the cyclone were plugged with thick hard dust.

Guess they are not up to country houses with log fires and messy boys. At least we can now fix the problem if it clogs up again. I'm getting a Henry next time.

Thanks again

Posted on Apr 05, 2010

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