The fan on my One Mix 3s Yoga was pretty loud out of the box. I made it quieter by installing the fan from an A1370 Apple MacBook Air 11".
I used 3M VHB 5962 tape to secure the fan, but you can also use Tesa 61395 or another non heat sensitive adhesive. You may like to add some thin rubber shims on top the fan to make sure pressing on the bottom case won't touch the fan hub.
For technical sharing only. Do not attempt this yourself by end user, for technician or other people who feel comfortable working with electronic devices only. Use of this information is as-is, and I will not be responsible for support or if you damaged your device trying it.
