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My fan is making constant, loud buzzing noises. What can be done to fix it?
MacBook Air, OS X El Capitan (10.11), 2012
Reset SMC. https://support.apple.com/en-us/HT201295
Choose the method for: “On Mac notebooks with non-removable battery”
If this does not help, contact Apple.
Genius Bar reservation:
http://www.apple.com/retail/geniusbar/
Best.
That is an AHT error code indicating that the exhaust fan is malfunctioning. Bring the MBA for service.
Ciao.
4MOT/4/40000002: Exhaust-0
