Got 2 x dysons pulsating on and off (especially on max) - cleaned out bins thoroughly and washed filter etc - still pulsating…
Then found out the 'wash filter' is a joke - what you actually need to do is pop the top off the filter to pull / tap out the dust / hair inside before washing!
Some people have also commented this fixes their dysons from smelling bad due to wet dirt etc stuck inside the filter which doesnt get cleaned out with the normal rinse under a tap maintenance task
Here is a vid - https://www.youtube.com/watch?v=ZXioUi_-NPw&feature=youtu.be
Hope it helps someone else
RTFM :)