Air not blowing out center vents/buzzing noise from dash

Has anyone ever had air not blowing out of the center vents, but blowing out the side vents in the front? It also makes a loud buzzing noise from the dash that lasts about 10 seconds when I crank it up. I’ve seen online it could be a million things, but I’m wondering if anyone on here has had a similar problem that could pin point exactly what I need to look at. TIA!

 

Odds are it is your air blend servo motor under the dash. You can usually access them by removing the glove box.

 

The 10 second buzzing could just be your electronic brake booster, and not related to your vents, which as previously mentioned is almost 100% one of your hvac servos. There are two on the passenger side and if you have dual climate control another on the drivers side.

 

There are 4 actuators under the dash, 2 on the glove box side and 2 on the drivers side. The one that controls where the air goes is on the glove box side and is a pain in the @#$ to replace.