It’s pretty noisy when going full blast. I thought it only happened when you had it on max or recirc.

Its 96F here but car is cool and I’ve turned the front flow down a lot. AC is set at 68. Shouldn’t the back loud fan be off? Recirc is off.

 

See if it is set on auto.
You can also see of you can set your auto setting to balanced instead of full blast. Seems to be less noisy when I set it like that.
What is the rear fan speed set at? I found the kids sometimes turn it way up and then it is pretty noisy when I get in to drive.