I live in a doublewide mobile home and my heat is not working right. My husband said that it was working fine yesterday but now it is not. I turn it on and it is blowing some kind of hot air in the back of the home where the unit is but not out the vents. I took the filters out and cleaned them and still nothing. I was hoping someone could help with this because I really can't afford to call a professional!

Sounds like either the blower isn't working right, or the ductwork has come apart, or perhaps inner duct insulation has come loose. If you can verify that the blower runs, you may try spying through the vents/ducts from indoors with a flashlight & mirror, to see if you can spot anything that looks unusual.