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Disable Hard drive sensor (iMac) after HD swap

86K views 12 replies 8 participants last post by  phaneos 
#1 ·
I replaced my internal drive with a SSD and the hard drive fan is currently running at 5000rpm due to the fact that she's not getting the correct information from the HD sensor.

Is there's a way that I can disable the sensor OR set a manual value for the fan speed?

Thank you
 
#2 ·
What most people do in that case is short the sensor cable with a pin and tape it up. It's not ideal but I can speak from experience that it does work.

You might also be able to purchase a heat sensor like they use on the optical drive and replace the hard drive one with that but you'd have to make sure you got the right part number etc.

Option C would be to install a fan control app that would limit the speed for the fan.

Google will return you a ton of threads on this topic
 
#6 ·
I just grabbed one of these, as I'm replacing the HDD in my iMac as well - https://www.applecomponents.com/items/0000004398/cable-temp-sensor-optical/?pn=1

Replaces the cable that used to read your drives built-in temp sensor with an external temp sensor (like the 2008 models had)... Apparently it works like a charm - according to several forum posts. At $20 it's not a huge gamble one way or the other.
 
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