Hello, this is Ava with Think Crucial.

Most Bissell vacuums have Thermal Motor Protection which is a built in safety system that stops the machine if it begins to overheat. This usually happens because the filter needs washing or your machine is blocked. If your machine turns off on its own, unplug it and leave it for at least an hour to cool down. Remember to check the filter and look for blockages before re-starting. When the motor cools for approximately 30 minutes, the thermal protector automatically resets and cleaning may continue. If the cleaner will not turn on or the thermal protector continues to activate, your cleaner may need servicing.note: the thermal protector controls the main vacuum motor only, not the brush motor. If the thermal protector activates, the brush will continue to operate normally; however, there will be no suction.

You can purchase a wide variety of high quality Bissell replacement parts for your Bissell vacuum direct from Think Crucial with free shipping and an exclusive 10% coupon for Fixya.com readers, use code: FIXYA10

https://www.thinkcrucial.com/collections/vendors?q=Bissell

I hope this was helpful.

Ava B.
Think Crucial Customer Care
http://www.thinkcrucial.com/