2000 Ford Mustang Q&A

2000 Ford Mustang Question: why does my A/C on blow through the defrost?

Why does my A/C only blow through my defrost no matter what setting its on? it blows hot and cold but only through t he defrost. -
Answer 1
there is a small vaccuum line under the hood back by the firewall in the center that may be off or broken. Roy -
Answer 2
maybey becuse the battery is low cuse my did thate 30 miutes latere just cahrge battery man -