Under FC2 I get "unknown service lm_sensors". Is this a difference between FC2 and FC3? How may I read the sensors and get information?
FC2 lacks the initscript. The initscript is mentioned in the README in /usr/share/doc, though. I'd bet you'd find a closed bugzilla showing it fixed for FC3. (I checked my FC2 system today looking for this and found I was missing it.)