Vacuum blows out dust/pet hair etc. when in use

\015 Vacuum blows out instead of sucking up- we’ve cleaned the brush, tank, etc. We have a dog that sheds so a lot of pet hair goes in but even though we’ve unclogged everything it’s still not working. When vacuum is pulled back it leaves all the dirt etc. behind and when pushed forward all of it is left or more comes out the sides.\015 – Hoover U5753-900 WindTunnel Bagless Upright Vacuum