My Dyson cuts out after about five to eight minutes of working, if left for a while to cool down I can restart it. I assume that it has a thermal protection cutout.

Brian Purdie, November 2007

Our Dyson DC07 has Same Problem.
I have removed Intake Washable Filter & Output Hepa Filter & Dust Collection Assembly & Motor runs longer, but Runs Very Hot & Eventially Still Trips Out on Thermal Protection Switch.
This tells me that the Filters & Collection Assembly would contribute to Faster OverHeating, but are NOT the Primary Cause of the Motor OverHeating.
I'm ready to Remove the Entire Motor Assembly, but that looks Formidable.
Any More Suggestions, Please..
Leo & Joyce in Mississippi

Leo & Joyce, November 2007

Hi.

It can be a faulty thermal cut out but it is more probable to be blocked filters or blockages in vortex.
Try this site for help, http://dysonmanuals.inc.io/

Chris, November 2007