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eeking33 Author

Level 1

11 points

iMac fan runs continiously

What is causing my iMac fan to run constantly

iMac 27″, macOS 12.0

Posted on Jan 7, 2022 12:59 PM

Top-ranking reply

den.thed

Level 10

83,230 points

Posted on Jan 7, 2022 3:05 PM

By default the Fan(s) "depending on the model" always run when the iMac is on.

If the Fan(s) are running full blast, then try resetting the SMC.

https://support.apple.com/en-us/HT201295

If the SMC reset does not help and the iMac has been repaired or you have done some type of DIY hardware upgrade? Then there is a pretty good chance that a temperature sensor is either disconnected or has been damaged.

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iMac fan runs continiously

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