MacBook Pro 16" fan noise issue.

Reset  SMC:   How to reset the SMC of your Mac - Apple Support   Choose the appropriate method.

Quote:

Resetting the system management controller (SMC) can resolve certain issues related to power, battery, fans, and other features.

Startup in Safe mode. https://support.apple.com/en-gb/HT201262 Choose the appropriate method.

To leave Safe Mode, choose “Restart” at the bottom.

Quote:

     Safe mode prevents your Mac from loading certain software when it starts up, including login items, 

     system extensions not required by macOS,

     and fonts not installed by macOS. It  also does a basic check of your startup disk, 

     similar to using First Aid in Disk Utility. 

     And it deletes some system caches, including font caches and the kernel cache, 

     which will be created again automatically as needed.

vijayar wrote:

My MacBook Pro 16" one makes lot of fan noise, when I connected to the external monitor.

Tried multiple connectors but no luck.

Any solution will be appreciated.

Thanks,

Vijaykumar AR

One insight proposed early on for the 16"MBP is power plugged into the right hand side port,

external monitor plugged directly into left hand side port. Avoid a hub

Keep your Mac notebook within acceptable operating temperatures

https://support.apple.com/en-us/HT201640