Dyson roller bar locks when vacuuming

SOURCE: Dyson DC 17 Asthma allergy Vacuum

I had a similar issue. I called Dyson. Hey why not, the number is right on the from of the machine. SO IS the beater bar on/off button, right next to the big red on/off switch. It does have a safety off when something jams the bar from rotating so the motor doesn't burn out. I also removed my sock and on restarting the thing, the beater bar would motor was not turning on. I thought the reset would be inside but no, it is right outside in plain view, which I didn't see either. It is a grey button opposite the big red on/off switch. Boy did I feel dumb after that phone call!

SOURCE: motorized brush bar not turning on Dyson Vacuum

Apparent common failure is that either the thin yellow and or blue motor drive wires that run from the LH side of the vacuum where the "control board" is located down into the hinge / ball area become stretched and then fray and eventually break. Happened to my Dyson twice. First repaired under warranty, second took about 20 minutes. You need a Torx screwdriver to remove the LH panel ( 4 screws) and also an access panel (2 screws) at the side of the ball which permits access to the blue / yellow wire connectors. I replaced with a new wire and connectors having fed the wires through the access hole making sure sure enough wire was available for the movement of the handle. Also ensure that when the covers are replaced they do not trap any wires underneath.

SOURCE: Dyson DC17 - the vacuum shuts off automatically

I had the same issue. Got on the phone with Dyson. THe vacuum has a safety feature where if the motor gets too hot it cuts off. You have to leave it for 45 minutes or so and then it will work again. There is an underlying issue though. My problem was the black gasket thats in the debris bin shifted, probably from when emptying i pushed it on something. The black gasket should actually hang off the bottom like a skirt and the 2 groves should fit in on the groves of the gray mechanism. This seal is what provides 100% suction. Because of this..my vaccumm has been accumulating pet hair by the belt which i hear alot of people talking about and especially in the filter area. This is because I broke the seal by not having the gasket in place properly and it wasnt sucking 100%. They are sending me a complete new cyclone unit which has the debris catcher as well as she said its probably so caked up with debris it will never work again 100%. no questions asked they are sending it to me free of charge.

So if you remove the clear cyclinder debris catch thing all you will have is the purple cyclone on top and on the bottom is the black rubber gasket....if that shifted and is no longer hanging off...call dyson cause your vacuum is probably caked up...it will never work properly...they will send you a new part