I have a new furnace and central AC and the duct work was recently cleaned. when i use my AC a musty smell comes out. My basement is a little musty and i use a dehumidifier, but i think the smell is coming from basement. will cutting a vent in the basement return turn over the musty air and eliminate the smell.
More than likely not.
Opening a window on one side and putting a fan to blow air out the other would do more. That would be better than smelling dungeon for weeks.