Question about Dyson DC25 All Floors Bagless Upright Vacuum

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My DC25 Animal is making a howling, whistling noise. Primarily when turning off (winding down to shut off)

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  • Joseph Belmont
    Joseph Belmont Mar 21, 2015

    My "howling" disappeared completely when I replaced both air filters with new ones; exact replacements are available on Amazon.

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6 Answers

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If it started after you cleaned the filters, it is because when you smack the filter that is in the ball like they tell you to, it pushes the gasket in so air can sneak past it. take it back out and pull the rubber gasket away from the filter so there is about 1/16-1/8" away all the way around, then put it back in. it will seal it and stop.

Posted on Sep 13, 2012

  • Amy N Sjoholm
    Amy N Sjoholm Sep 11, 2015

    What an easy fix! Thank you so much!

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The noise is caused by the air blowing out of the motor leaking out between the rubber gasket of the filter and the motor housing. Smearing a very thin film of silicone grease on the rubber gasket should stop the noise completely.

My DC25 Animal is making a howling, whistling - c2dec2d4-2074-4dec-9fd3-5bf8d226b66b.jpg

Posted on Mar 31, 2014

  • Dickie Fix
    Dickie Fix Jun 02, 2014

    Another way of stopping the noise is to take a length of nylon cord or string about 16 inches (40cms) long and 1/8 to 3/16 inch (3 to 4mm) in diameter and insert it in the 'v' on the inner surface of the black rubber seal on the filter (it's hard to describe, but when holding the filter, it's easy to see where it goes). It only takes a minute and requires no tools, just your fingers. Fitting this cord raises the outer part of the seal just a bit to form a better air seal and prevent air being sucked in past the seal - it's this that causes the whining noise. This works well for me in my Dyson and is much better than the lubrication fix I posted above which solved the problem only for a couple of weeks.

  • Dickie Fix
    Dickie Fix Jun 02, 2014

    I've retrospectively added a photo of the filter with the last 3 inches of the nylon cord still to be fed into the seal.. Hope this helps to visualise things.

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The dc25 model tends to allow air to bypass the HEPA filter. The air makes a whistling sound. Remove the filter cover and try moving the filter around a little a see if it changes the sound. Sometimes it can be adjusted to stop the noise.

Posted on Jan 17, 2015

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MINE WAS THE SEAL IN THE TOP PART OF THE DUST BIN PART NUMBER 911077-01 FOR THE DC25 ANIMAL. I HAD TO USE A STAR SCREW DRIVER TO TAKE OUT 6 SCREWS AND THE FOAM GASKET BROKE THROUGH. nOW IT IS QUITE AS A MOUSE

Posted on Jan 16, 2015

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Bottom line is the air cant pass thru the flter any more They are not permant filters they need be changed If they where permant Dyson would not sell them

Dyson DC25 Post Filter oem 916188 05 envirocare f978

Posted on Jan 24, 2015

  • emer usa
    emer usa Oct 25, 2016

    Do not attempt to seal these filters they need to be changed air cannot pass thru anymore and is pushing out thru the seals on the side. Filters need to have air go thru them to filter. If you leave them the motor will run hot and burn out Dyson DC25 Post Filter oem 916188 05 envirocare f978

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It is the filter in the ball, the nylon mesh vibrates as the suction decreases. The mesh should be stuck to the inner filter but does loosen over time. Cured mine with a couple of thin lines of contact adhesive.

Posted on Jan 10, 2014

  • Justin Saechee
    Justin Saechee Jun 28, 2014

    Where exactly do you apply the contact adhesive?

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Posted on Jan 02, 2017

  • 183 Answers

SOURCE: whistling noise on dc25 Animal

there may be a small cut in the tube or there is something stuck restricting the suction check all hoses

Posted on Jul 28, 2010

  • 1 Answer

SOURCE: WHEN I TURN OFF DYSON

I am experiencing the same problem with dyson 25 when the motor is shutting down - i hear a strange noise ....

Posted on Jan 24, 2011

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1 Answer

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Hi there,

I'm sorry to hear you're having difficulties with your DC25. I'd encourage you to get in touch with us directly, as I'm confident we can resolve this issue for you. Please call our Helpline free on 0800 298 0298 (UK), or 1-866-693-9766 (US) so we can provide assistance.

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if it started after you cleaned the filters, it is because when you smack the filter that is in the ball like they tell you to, it pushes the rubber gasket in so air can sneak past it. take it back out and pull the rubber gasket away from the filter so there is about 1/16-1/8" away all the way around, then put it back in. it will seal it and stop.

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