The most common cause of no power is the machine overheating and cutting out. In this case once the vacuum cleaner loses power leave it for at least half an hour and then try turning it back on again. If it comes back on again after an hour then clean your filters and check for blockages.Click to see full answer. Also, is there a reset button on a Dyson vacuum?Dyson vacuums do not have a reset button you can push to solve all the problems, but there are a couple of things you can do. Usually, disassembling the vacuum is a must to get to the source of the issue.Secondly, does a Dyson vacuum have a fuse? Dyson vacuums contain a pre-filter that, during use, accumulates fine dust that prevents air flow into the suction motor. If it fails, the motor contains a non-resettable thermal fuse that ‘could’ be repaired with a $0.50 replacement part, but dyson service centers will simply replace the motor in that case. how do you troubleshoot a Dyson vacuum? Machine is Losing Suction. Check the Base for Blockages. Check the Brushbar for Blockages. Power Failure. Check for Overheating. Unplug. Brushbar is not Rotating. Remove the Red ‘C’ Clip. Remove and Clear the Soleplate. Vacuum Stand Does Not Hold Vacuum Upright. Turn Power Off. Vacuum Will Not Turn On. Check the Circuit. How do I reset my Dyson cordless vacuum?Locate the brush bar’s on-off switch, commonly located on the handle just above the vacuum’s body or in a slot on the side of its head. Press the button once to reset the brush bar, then flip the vacuum back upright, plug it in and power it on.