MERCURY SABLE VENT NO AIR

One Morning After I Start The Car, I Put On The Ac, And I Realized That No Air Was Blowing Out Of The Front Vents, But Ac From The Floor...

Just Recently My Vents Dont Work. I Can Hear The Fan Blowing But The Vents Wont Open. The Air Is Coming Thu The Defrost Area And Mabe A...