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In June 2017 Apple updated its 13" MacBook Air with a newer Broadwell Intel Core i5 processor, resulting in slightly increased performance and battery life.

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Fan running constantly after display replacement

Hi. I replaced the display on my MacBook Air last night using Ifixit’s kit. All went well. The new display works great, and everything else is functioning normally. However, the fan runs constantly even without intense usage. The computer is not even hot either. I’m worried I may have done something wrong during the replacement. Any ideas on how I can identify the exact problem? Thanks.

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UPDATE 5/15/20

I adjusted the fan settings in TG Pro to “Auto Boost”. This overrides the OS control of the fan, and sets the fan speed based on the temperature of the computer. I attached a screenshot below. As you can see, everything looks good. However, it says the fan is at 0 RPM, but it is still running full blast! Any help would be appreciated. Thanks.

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Answer this question I have this problem too

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Does your iSight camera work?

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Juan - I was hoping it was a simple problem.

OK, time to pull out the big guns!

Install this app: TG Pro you'll want the full version to get the diagnostics. Post a snapshot of the apps main window (you'll need to resize it so all of the sensors and fans are visible and post it here for us to see (as well as the diagnostics window too) Adding images to an existing question

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Thanks @danj. I finally installed the app and added the image above. Let me know your thoughts.

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OK I think I see the problem! Your fan has a tachometer within it which for some reason has failed or the circuitry on your logic board which controls the fan motors speed has a problem.

You could try replacing the fan (hoping) but I have a strong feeling your issue is within the logic board. You’ll need to find someone who has the deeper skills to diagnose what in the circuit failed.

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Juan Rodriguez will be eternally grateful.
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