Just installed the XB6 that arrived in the mail from Comcast a couple of days ago. Took the old one to the store halfway across town and through traffic to return it. Now back home, I realize this thing hums without end. Do I need to have it swapped? Do I have to take it clear back across town to do so at my own fuel expense? This is kind of ridiculous.
@zoeysma77 FWIW, just be aware that it does have a built-in cooling fan. We've seen many posts here indicating that some run louder than do others. YMMV.