Hello, this is Ava with Think Crucial
Your Shark model has a thermostat reset feature. If motor should overheat, the thermostat shuts off the power. The link below is the User's Manual for your Shark Vacuum which includes resetting your unit.
Shark NV22 Owner Manual Maintenance
You can purchase a wide variety of high quality Shark replacement parts 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=Shark
I hope this was helpful.
Ava B.
Think Crucial Customer Care
http://www.thinkcrucial.com/
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