How to reset fan on imac?

1. Choose Apple menu > Shut Down and wait for your Mac to shut down.
2. Press Shift-Control-Option on the left side of the built-in keyboard, then press the power button at the same time.
3. Release all keys.
4. Press the power button again to turn on your Mac.

Additionally, how do you reset a fan?

1. Locate the fan’s wall switch or circuit breaker.
2. Flip the switch/breaker off and wait about 5 seconds.
3. Flip the switch/breaker on and wait for 5 more seconds.
4. Repeat this off/on process 3 more times (for a total of 4 times).
5. The reset is complete when the fan’s LED indicator turns green.

Likewise, why is the fan on my Mac not working? Think your fan might be broken? The first thing you should do is launch Apple Diagnostics, one of the hidden startup options on your Mac. Turn your computer off, then hold the “D” key while turning it on. … If the hardware report says everything is fine with your fan, your issue is probably a software one.

Considering this, how do you reset SMC?

1. Shut down the computer.
2. Disconnect the MagSafe power adapter from the computer, if it’s connected.
3. Remove the battery.
4. Press and hold the power button for 5 seconds.
5. Release the power button.
6. Reconnect the battery and MagSafe power adapter.

Also the question is, why is my IMAC fan so loud all of a sudden? Your Mac fan may kickstart when you’re running intensive tasks or resource-heavy apps that make your Mac overheat. With MacBooks in particular, fan noise can sound as though your Mac wants to take off. By the way, in case of overheating, your Mac usually slows down.

Why has my fan stopped working?

Check Your Circuit Breaker If your cord is plugged in but nothing happens when you turn on your fan, check to see that you have electricity running to the outlet. … If you notice that a breaker has been tripped, flip it back on and then try turning on your fan again. If it works, you should be all set.