Chosen Solution
My 2009 iMac 27” CPU fan runs on high at times and then normal with minimal load. Mac Fan Control shows zero rpm when fan on high and then 940 rpm when not on high. I’d like to find a replacement ambient temperature sensor but can only find one for 2011. Can I use this version or is there another option?
I ended up installing a new CPU fan and ambient sensor since I had it apart and that fixed the issue. Thanks for all your help.
