Because it was still under warranty, I took it back to Best Buy (Geek Squad) and they shipped it back to Klipsch and got it fixed w/o any cost to me. If I remember, TH2 is located on the topside of the main power board on the lower-center area.
I got a blown thermal fuse (TH2) on my SUB-10. I just need the spec/rating or part# so I can buy it from a Radio Shack or Fry's or any electronics store. Thanks.