Originally posted by applemacdude
This computer is based on the 'PowerPC 7450' processor. The CPU manufacturer has disabled the Thermal Assist Unit on this chip, so it is not possible to report temperature information.
A feature check executed by the Mach kernel additionally confirms that this processor is not capable of returning temperature values.
A scan of your hardware indicates that there seems to be no alternative temperature sensor available that can communicate with the operating system.
Unfortunately, your hardware does not support temperature monitoring so this application cannot be used.