There is a thermal breaker on the motor that shuts the motor off if it gets up to a certain temperature. I don't know that I've ever seen one fail before, so my presumption is that there still is a clog somewhere.

I agree with the reviewer who called Dyson out about the Animal 2 having too much suction for normal carpets. I have hardwood floors and LARGE area rugs. My carpets are not shag, nor are they considered "deep pile." However, the vacuum is almost impossible to push. On a previous Dyson I was advised to either drill holes to allow more air into the height leveler or to add washers to increase the distance between the brush roller/suction tube and the carpet. Both would let more air in, reducing the suction. I also noticed that one person posted the suggestion that one remove the rubber portion of the height adjustment bar altogether. Tomorrow I will be on the phone with Dyson. It is ridiculous to spend this much on a vacuum cleaner that doesn't work.I read reviews but several people said that they worked fine on shag and deep pile carpeting. Tomorrow I will be on the phone with Dyson. It is ridiculous to spend this much on a vacuum cleaner that doesn't work.