Hi Just done a complete clean install of OSX on my iMac. It is now running Snow Leopard. Reinstalled smcFancontrol v2.2.2. smc is showing a temp in the Menu bar that my iMac iss running at -127 degress C and the fan spped is 999 even after I have added my setting and applied them. Infact it just is not working at all, I have set the fan speeds and applied my settings, but everything in SMC just remains the same. Any ideas as to how I can get this working correctly. I did install fan control but did the uninstall process so that should not be an issue. Thanks.