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No idea what firmware you are using, but if you use Marlin, check this video for example: [MEDIA]
But I guess you will find the right one for...
I have the same with my Revo Micro on Ender 5.
Here is a link to a video of the noisy fan
Just using the revo micro for a few moths now and it is great, except for the little fan. It is really noisy and sometimes I need to give it...