Chosen Solution
I just upgraded the drive on my 2009 iMac to a 500GB SSD using the iFixit kit. Everything is good but the hard drive fan now runs at full speed all the time which I gather is a common problem after SSD upgrades. I am temporarily managing it by overriding system fan control using TG Pro to keep the fan speed down but doesn’t seem like a good, long-term solution. I re-used the adhesive temp sensor from the old drive (now sticking to the metal case of the new SSD) and TG Pro reads ~40°C (@ 1600RPM). So, if the sensor is reporting that the drive is at a reasonable temp, why does the computer think it needs to run the fan so fast? Is there a solution to this that lets the computer properly regulate fan speed without being overridden or is there some hardware flaw I need to address? thanks,
OWC In-line Digital Thermal Sensor for iMac Late 2009 - Mid 2010 Hard Drive Upgrade Required for any drive installed into the main drive bay.Eliminate fan noise and maintain correct system fan control when upgrading your late 2009 - mid 2010 iMac.The only iMac HDD upgrade option on the market certified to pass the Apple Hardware Test.Fixes firmware incompatibility issues with third party hard drives.https://eshop.macsales.com/item/OWC/DIDI…
