I have a NUC8i3BEH. I have fan spinning all the time at a high rpm regardless of cpu temp,
I think it started since I upgraded the bios to 0087.
Could you please send me 0085.bio file so that i can downgrade and see if it help?
The fan is dustfree btw.
This issue was fixed in BIOS 85. You actually shouldn't need to downgrade to BIOS 85 (and you can't if you have already installed BIOS 87). Try reinstalling BIOS 87, but this time do so using the BIOS Recovery process. BIOS Recovery is available from the Power Button Menu. See Intel NUC BIOS Update and Recovery Instructions for more information on the process.
If the problem continues to occur, try resetting the BIOS configuration to defaults (using the F9 key in Visual BIOS) and then check again.
Hope this helps,