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Today my iMac18.1 w/32GB memory i5 2.3GHz running Monterey 12.6 latest patch started suddenly to run CPU Fan at full blast ~3700RPMs when left in screen saver for a while like 15-20minutes even though all temperatures are low.
Fan Control doesn't seems to be able to handle this even CrystalIdea clams it should be supported/working on my iMac + macOS versions :/
Any hints appreciated, TIA!
iMac
Click on the Custom button.
Select "Constant RPM value" to manually control the fan speed.
or
Select "Sensor-based value" for fan control that is based on a sensor and temperature range
Select the sensor that you want to use. (the CPU PECI generally runs the warmest)
Then set the Start and Maximum Temperatures and click OK
Sorry I use Light windows and Fahrenheit.
MacFanControl works fine for me on several different Mac’s that are running macOS 12.6 Monterey.
If you are using the Sensor Based Control and recently updated macOS and/or MacFanControl., Then I suggest revisiting the Sensor Based Control panel and resetting the Start ramping up (low) and the Maximum (high) settings.
Tip try setting the Start at 30 to 35C and the Max up around 90 to 95C.
Thanks but I'm new to FanControl, not using Sensor Based, it seems I can't make FanControl control the fan at all, not really seeing anything in system log that reveals issues ImHO, seen thes kind of log events when attempting to set a fixed fan speed and when returning to auto:
default 10:31:41.044137+0200 runningboardd Invalidating assertion 165-124-825 (target:[app<application.com.crystalidea.macsfancontrol.1184485.1184491(501)>:626]) from originator [daemon<com.apple.coreservices.launchservicesd>:124]
default 10:31:41.158575+0200 runningboardd Calculated state for app<application.com.crystalidea.macsfancontrol.1184485.1184491(501)>: running-active (role: UserInteractive)
default 10:31:41.158580+0200 runningboardd [app<application.com.crystalidea.macsfancontrol.1184485.1184491(501)>:626] Ignoring jetsam update because this process is not memory-managed
default 10:31:41.158854+0200 runningboardd [app<application.com.crystalidea.macsfancontrol.1184485.1184491(501)>:626] Ignoring suspend because this process is not lifecycle managed
default 10:31:41.158902+0200 runningboardd [app<application.com.crystalidea.macsfancontrol.1184485.1184491(501)>:626] Set darwin role to: UserInteractive
default 10:31:41.159071+0200 runningboardd [app<application.com.crystalidea.macsfancontrol.1184485.1184491(501)>:626] Ignoring GPU update because this process is not GPU managed
Also tried SMC and NVRAM reset, nothing makes the fan stop except leaving it unplugging it for several hours.
Found that disabling the power saver for every starting will stop the fan ever kicking in at max speed.
If you are using the Sensor-based control, then the fan speed will only increase when the temperature goes above the lower set point.
For MFC support, see > https://crystalidea.com/macs-fan-control/support
If MFC is not working, then perhaps you need to uninstall and reinstall it.
That much I understand :) but thanks will attempt to reinstall, weirdly MFC works flawless on my MBP M1 also running Monterey 12.6... maybe RC might be that I have prior installed an old App from AppStore named: Monity by Lukasz Kulis to track CPU temperaturs... Dunno
Turned out the Fan plug wasn't properly seated on the motherboard ;)
Now I can control the Fan with MFC, thanks for all replies!
No problem I can see through light windows :)
That much I can figure out, only FanControl doesn't make my Fan go at all, ie. it's not controlling anything :/
Monterey 12.6 on iMac18.1 Fan at full blast suddenly from screen saver
