Just stopped working

Inspect the filter.Open the secondary filter on the base of the vacuum to ensure that dirt and debris have not collected on the filter, as this will limit motor performance. Remove the filter from the dust compartment and rinse with water to clean. Allow it to dry completely and return to the dust compartment.--------
Also check if dust bag is got over full and that is causing the problem.Open the dust compartment, take the old dust bag out of the bag holder and discard. Open the end of a new dust bag and attach to the dust bag holder. Close the dust compartment and tighten the dust cover.Also check properly that dust compartment is not got loose. Open cleaning attachment and check the hoses and nozzles on the frequently to ensure that they are free of dirt, obstruction or hair.Also inspect the brushes, if there is already dirt got stuck in the brushes and that is causing the problem.Clean the brushed.---------- This will help, to confirm where the problem is and to resolve the dirt /debris issue.----- Thanks.Helpmech.

The cutting out is, in a way, a good thing. Most vaccuum cleaners have a thremal cutout, so if the cleaner overheats it cuts out until a safe temperature is reached to save the motor from damage.

The question here is why is the motor overheating. There are only 2 possibilities:

1: The motor its self is failing and windings in the motor are burning out, causing the overheat. If this is happening, then the overheat will probably be accompanied by much louder noise from the motor that you are used to and possibly the smell of burning emectrical equipment. If this is happening then you should stop using the cleaner right away. Generally the cost of a replacement motor (Unless the appliance is under warranty of course) is more than the residual value of the vaccuum cleaner.

2: The motor is overheating because it is being overstrained. Possible causes for this are:
Dust filters on the machine are clogged (Bagless machines typically have at least 2 filters, one on the exit airflow from the motor and another somewhere around the top of the cylinder. In a Dyson for instance, there is a foam filter in a clip open housing directly above the dust container.

Clean, wash or replace the filters as per the manufacturer's instructions.
If it has a bag, then the pores of the bag may be blocked - swap out the bag.
If it is an upright with a brush, ensure that the brush is turning freely
Ensure that all pipes are free from obstructions, pay particular attention on upright cleaners, to the pipe that leads from the beater brush housing to the waste dust collection

Most likely your brush needs to be removed and cleaned. Clean all debris that might be in the bristles of the brush. You will see a holder for the brush on each end that holds it into the frame of the vacuum. The two holders should turn freely. If they do not, spray a bit of WD40 between the brush and the holders and rotate the holders around the brush. Doing this will clear up the most common occurring cause of the problem you are facing. One other important item is the belt that drives the brush. Make sure it has not broken or stretched. If it has, replace it while cleaning the brush.
Good luck and feel free to contact me if you find this does not solve your problem.
Paul

Most likely your brush needs to be removed and cleaned or the belt is broken for the beater brush. Clean all debris that might be in the bristles of the brush. You will see a holder for the brush on each end that holds it into the frame of the vacuum. The two holders should turn freely. If they do not, spray a bit of WD40 between the brush and the holders and rotate the holders around the brush. Also replace the belt if necessary. Doing this will clear up the most common occurring cause of the problem you are facing.
Good luck and feel free to contact me if you find this does not solve your problem.
Paul

Most likely your brush needs to be removed and cleaned. Clean all debris that might be in the bristles of the brush. You will see a holder for the brush on each end that holds it into the frame of the vacuum. The two holders should turn freely. If they do not, spray a bit of WD40 between the brush and the holders and rotate the holders around the brush. Doing this will clear up the most common occurring cause of the problem you are facing. One other important item is the belt that drives the brush. Make sure it has not broken or stretched. If it has, replace it while cleaning the brush.
Good luck and feel free to contact me if you find this does not solve your problem.
Paul

Most likely your brush needs to be removed and cleaned. Clean all debris that might be in the bristles of the brush. You will see a holder for the brush on each end that holds it into the frame of the vacuum. The two holders should turn freely. If they do not, spray a bit of WD40 between the brush and the holders and rotate the holders around the brush. Doing this will clear up the most common occurring cause of the problem you are facing.
Good luck and feel free to contact me if you find this does not solve your problem.
Paul

Return if still under warranty/ Could be motor...

most vacuums have a heat resister in when they overheat they cut out, this is normally because they are full up, got a blockage or the filters need cleaning, suggestions are, clean filters, empty and check for blockage.

the motor as a cut out switch ,if the motor housing is full of dust , the motor will get hot and the switch will activate ,

Try this page: -

http://www.fixya.com/support/t192124-overheating_dyson_dc07

Regards Gualo