Fedora on iMac G5

[pouchee21]

I've installed F8 ppc on my iMac g5 Rev B, everything seems OK and I updated all the software until today.
But the fans remains at full speed, very loud, at this point with this noise it is very difficult use this computer to work.
The Kernel are with the options for this machine (windfarm_pm81)


The output for cat /var/log/messages is

Feb 3 19:34:18 Fedora kernel: windfarm: Overtemp condition detected !
Feb 3 19:34:19 Fedora kernel: windfarm: CPU frequency unclamped !
Feb 3 19:34:19 Fedora kernel: windfarm: Overtemp condition cleared !
Feb 3 19:34:23 Fedora kernel: windfarm: Clamping CPU frequency to minimum !
Feb 3 19:34:24 Fedora kernel: windfarm: Overtemp condition detected !
Feb 3 19:34:25 Fedora kernel: windfarm: CPU frequency unclamped !
Feb 3 19:34:25 Fedora kernel: windfarm: Overtemp condition cleared !
Feb 3 19:34:29 Fedora kernel: windfarm: Clamping CPU frequency to minimum !
Feb 3 19:34:30 Fedora kernel: windfarm: Overtemp condition detected !
Feb 3 19:34:31 Fedora kernel: windfarm: CPU frequency unclamped !
Feb 3 19:34:31 Fedora kernel: windfarm: Overtemp condition cleared !
Feb 3 19:34:36 Fedora kernel: windfarm: Clamping CPU frequency to minimum


Any help please!!!!!

Thanks