My dc27 has lost suction in the upright position when using the tools. Also a change in the way it sounds when switched on. Noise is coming from the air escaping at bottom where it clips back together after it has been emptied. Seems really noisy now. Never sounded like that before. Did notice a slight burning smell a couple of times before this happened

SOURCE: Dyson Dc-17 Animal Doesn't ****

I had the same problem and today I finally called Dyson. They were very helpful. I disconnected the hose from the handle using the red release button. If you hold the handle up to the light and can't see light on the other side, there is a blockage. A wire coat hanger worked great to dislodge our blockage and it's working perfectly again!

SOURCE: Dc 14 no suction/noise

Hi,

The sound you can hear is the clutch slipping the machine is designed to do this if the brush roller is jammed or foriegn object obstructing brush roller.

Remove the sole plate by turning the 3 plastic screws to unlock pull off sole plate now look for anything that is stopping brush from easily turning. If nothing obviouse but roller hard to turn by hand remove the brush roller & check the bearings at either end of the roller if they are siezed up A new roller will sort this out.

If brush roller is turning freely then your problem will be warn out clutch this will need replacing.

Its A lot to explain so try this site it has clutch removing manual for Dc14. http://dysonmanuals.llc.nu/

SOURCE: Dyson won't go back into upright position to engage suction

The dyson.com website had a solution for this particular problem. Just press in a button in the area around the right wheel while lifting the rear of the vacuum up. This allows the base to roll forward enough to go back into the upright position. I did this and it worked. All fixed.

SOURCE: loss of suction when using

u can remove the flexi pipe by pressing the inset button,it may be bit stiff if it had not being removed before.may be something is stuck at the bottom,also remove u bend where most of the stuff get stuck. i just posted how i fixed the suction and over heating problem. pl read it. good luck

SOURCE: Slight burning smell when dc07 is in use

Sounds like your belt can either be rubbing against something or its stretched out. Either way you should check into getting the belt changed.