Hi Edsbow,
Congratulations on the new Edge and welcome to the Heartland Owners Forum.
I'm not sure what you mean by air blowing "straight out and not down." If your vents have angled slats, the air will typically be directed at an angle. Is that what you mean?
As for the awning, if it works for a while and then blows a fuse, it could be something like a staple that pierced the wiring. Or it could be a problem with the awning motor. Or it might be the awning motor.
It might be possible for the dealer to test for a motor problem by disconnecting the power near the motor and running a similar 12V device for diagnostic purposes.
Or since the dealer has already had 3 tries (and presumably thought it was working), you might call Heartland Customer Service at 877-262-8032 / 574-262-8030. Have your VIN # ready. Perhaps they'll approve replacing the awning motor or entire awning assembly.