Motor runs intermittently

faulty trigger
worn brushes on motor
6 volt battery not charging properly

If the motor is running intermittently you might want to check out the brushes for wear and bad contact against the commutator.

Claire, if filter is clean and problem persist, return for exchange.

Hi there, it's Jack at Dyson.

If your DC35's motorised cleaner head seems to work intermittently or cuts out when moved, this suggests that there could be a loose connection somewhere. We're keen to help you check for this, and our experts can talk you through some simple diagnostic checks to pinpoint the cause of the issue. If a replacement part is needed, we can also confirm whether or not your DC35 is still covered under its Dyson warranty.

When you have your DC35 fully charged and easily to hand, please give the Dyson Customer Helpline a call on 0800 298 0298 (UK), 1-866-693-9766 (US), 1-877-397-6622 (CA) or 1800 239 766 (AU).

We'll look forward to speaking with you.

The bag is part of the filtration design of the machine. Using it will not only make your primary cartridge filter last longer, but make the vacuum suck more efficiently & make your vacuum as a whole last longer.
You can bypass the switch to check if the motor is okay.
More often than not an intermittent operation of a machine is actually due to a break in the power lead. This is not always apparent externally though. You may need to get this checked by a qualified / certified person.

Hi Bill, it's Jack at Dyson.

I'm sorry to hear you're having difficulty with your DC24. The issue with the motor running intermittently sounds very unusual. We'd like to take you through some further troubleshooting checks to determine what's causing this.

I'd encourage you to give our customer Helpline a call on 0800 298 0298 (UK), or 1-866-693-9766 (US). If your machine does happen to need a repair, our experts will also be able to confirm if this is covered by our 5-year guarantee.

We'll look forward to hearing from you.

Best wishes,

Jack
Dyson Online Customer Support
www.dyson.com

before replacing the motor, check the switch itself,, it could be bad or shorting ,, also,, if it seems intermittent it could simply be the motor brushes are worn, both of those are much cheaper than the motor, as with many fixes, sometimes its cheaper to replace the whole thing that repair it,, especially with vacuums

The motor running slower was the motor starting to burn out. The "almost start" is the brushes making intermittent contact with the armature in the motor.
Your machine needs a new motor Pam.

If you know how to open it's inducton motor and know to replace bushing and bearings, then turn it up-side down and dis-assemble your equipment, replace the bushing and bearings,
if not just bring it to a repair shop then they will be the one who will replace it

There's a thermal cut-off when the unit has overheated. Mine does this quite often and I remedy it by emptying the canister and making sure the filter is clean, especially of lint and things that prevent good air flow.