2008 Ford Taurus. The front defroster doesn't seem to blow and air when i turn it on, what might cause this?

2008 Ford Taurus.
The front defroster doesn't seem to blow and air when i turn it on, what might cause this?

Added (1). the windows fog up pretty bad and turning A/C on doenst seem to help at all.

The fan is blowing/running but not going where you want it to go? There are a couple of 'blend doors' inside the duct works inside the dash that direct the air per the setting of the dashboard controls. Some of these doors are engine vacuum powered & some are electrical. Sounds like one or more of these blend doors are not working. You'll have to let a pro crawl around under the dashboard & see what he can find.