Constant running fan after replaced hard drive with solid state drive.

Can and how is this corrected?

iMac 27″, macOS 10.13

Posted on Apr 20, 2023 11:26 AM

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den.thed

Level 10

97,998 points

Posted on Apr 20, 2023 11:53 AM

What year model is the iMac?

see > Identify your iMac model - Apple Support

The iMac's HDD has/had a built-in thermal sensor that the SMC uses to control the HDD fan speed. When you replace the HDD, you also need to replace the SATA cable with the one that has a built-in digital thermal sensor.

2009 -2010 see > https://eshop.macsales.com/item/OWC/KITIM09HE250/?

2011 see > https://eshop.macsales.com/item/OWC/DIYIMACHDD11/

2012 and later see > https://eshop.macsales.com/item/OWC/DIDIMACHDD12/

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den.thed

Level 10

97,998 points

Apr 20, 2023 11:53 AM in response to Paradiddle01

What year model is the iMac?

see > Identify your iMac model - Apple Support

2009 -2010 see > https://eshop.macsales.com/item/OWC/KITIM09HE250/?

2011 see > https://eshop.macsales.com/item/OWC/DIYIMACHDD11/

2012 and later see > https://eshop.macsales.com/item/OWC/DIDIMACHDD12/

Mal-S

Level 5

5,098 points

Apr 20, 2023 11:52 AM in response to Paradiddle01

Try resetting the SMC up to four times in a row.

Reset the SMC of your Mac - Apple Support

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Constant running fan after replaced hard drive with solid state drive.