Fan of my MacBook Air is Running at High Speed and Making Noise I have this noise problem recently. Everything was good a few weeks ago.
Reset NVRAM &amp; Reset SMC

If that doesn't help you might want to open up your MacBook (or get it opened up by a technician) to check for dust or other clogging. An Apple Certified Service Provider will also have the ability to do a hardware test, the fan itself could be the problem as well.