I frequently monitor the temps in both of my HR21s. (one big reason is that I took out the original hard drives and installed 1TB drives inside both) The temp has always been hovering between 117 and 119, after an hour or two of use. (the room temp is always maintained at 66 degrees, because I like it cold) Yesterday, I suddently noticed that one of the HR21 showed 77 degrees... up to 80 degrees..... after 3 hours of use. I tried it again today, still in the same range... Is the temp sensor inside that HR21 kaputt? Thanks!