No, it means the system is not detecting temperature, something for which my simple code does not (yet) have the ability to report. Did you modify the code to query a different sensor? At my house I have two HP systems, for example, and each uses a different sensor. One of them has a "Chassis Thermal Index" where the other one has a "System Ambient Temperature". At the moment I don't have access to any systems other than HP business class machines (my workplace junks the some of nicest old