KitchenAid 12" Convection Bake Digital Countertop Oven

I got mine and was super excited.
It’s broken and the "convection fan rubs on the body, so it sounds like a kid riding a bike with cards in his spokes.

Sending it back. I will get a non-refurb.

What is the maximum clearance from the bottom of the heating elements on the top, down to the top of the rack in the lowest position?

https://www.kitchenaid.com/shop/-[KCO273SS]-405180/KCO273SS/

KitchenAid doesn’t give that info.

I went through the first 10 of 27 pages of Q&A on Amazon and found only this info:

Don’t know, but large enough to bake a 5 LB. stuffed turkey breast.

External: 18 inches wide by 11 1/2 inches tall.
Internal: 12 inches deep by almost 13 inches wide.