How to override the fast fan caused by an Incompatible Drive

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May 29, 2019 - 07:55:22

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Introduction

Sometimes replacement hard drives aren't compatible with the iMac temperature sensors, so the fan will go into overdrive.

By removing the control board from your old hard drive, you can trick the iMac into thinking a new hard drive is compatible, keeping it from turning the fan on all the time.

What you need

Step 1 How to override the fast fan caused by an Incompatible Drive

How to override the fast fan caused by an Incompatible Drive, How to override the fast fan caused by an Incompatible Drive: step 1, image 1 of 3

How to override the fast fan caused by an Incompatible Drive, How to override the fast fan caused by an Incompatible Drive: step 1, image 2 of 3

How to override the fast fan caused by an Incompatible Drive, How to override the fast fan caused by an Incompatible Drive: step 1, image 3 of 3

Pretty simple guide here . UNSCREW the logic board PCB from the ORIGINAL hard drive from the iMac 2009/2010/2011+ Hard dive for step 1:

Step 2

How to override the fast fan caused by an Incompatible Drive: step 2, image 3 of 3

Step 2: is simple. Simply put clear tape or anti static tape on the logic board PCB of the original hard from the iMac . Making sure it wont touch anything, as safety.
MAKE SURE YOU PLUG IN only the temperature sensor cable FROM the iMac to the hard drive Logic board we have taped to the iMacs back housing, this is *crucial. This will make the iMac control the fan speed as normal. :)