fan runs constantly

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Level 1

4 points

fan runs constantly

I have a 27" late 2019 model iMac running 11.2.3 macOS Big Sur. I purchased it last April and had no issues with it until 2 months ago. At first I thought my old external HD was going out so I replaced it, later I realized it was my computer. In over 9 months the fan has never kicked on no mater how many things I was running. Now it runs even with everything shut down and no programs open. also have noticed a slow down and an inability to be able to rub Final Cut, have to use iMovie to do anything. Have called apple support several times only to be told this is normal for the fan to run, if its normal why did it wait 9 months to start! I am extremely frustrated and no longer enjoy using my computer, I am wishing I would not have spent the money and kept my old 2009 unit which worked better than this one is now.

Posted on Apr 12, 2021 12:18 PM

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Answer 1

Top-ranking reply

Limnos

Level 10

418,681 points

Apr 12, 2021 12:22 PM in response to papabrett

Reset the System Management Controller (SMC) on your Mac - https://support.apple.com/HT201295 - Learn when and how to reset the System Management Controller (SMC) on an Intel-based Mac.

Is your house dusty?

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Answer 2

Limnos

Level 10

418,681 points

Apr 12, 2021 3:07 PM in response to papabrett

Run this analyzer and post the results here:

Etrecheck - http://www.etrecheck.com/

See http://www.etrecheck.com/faq for information about the basic version which is free and how to upgrade this to a power user version.

Using Etrecheck - https://discussions.apple.com/docs/DOC-6174

Extra tips about settings to have it check all parts of your computer, and how to post long reports to the Apple Support Communities window: https://discussions.apple.com/thread/250599211?answerId=251149996022#251149996022

You coul also leave Activity Monitor running and see if there's any kind of runaway app.

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Answer 3

HWTech

Level 9

60,428 points

Apr 12, 2021 2:03 PM in response to papabrett

Run the Apple Diagnostics. If a temperature sensor is bad, then it will cause the fans to run at high speed in order to protect the Mac from overheating.

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