Chosen Solution
Hi again just ran a hardware test on my 27" Imac and came up with 4MOT/4/40000003:HDD-1244 does anybody know what it refers to. thankyou Mark
Been listening to that run away fan for a long time now ;-) Loud, isn’t it! Here’s what you need to fix the problem: OWC In-line Digital Thermal Sensor for iMac 2009-2010 Hard Drive Upgrade https://eshop.macsales.com/item/OWC/DIDI… Apple used priority heat sensors on this series of machines.
