Why is my nintendo switch overheating

How much have you been using your Nintendo switch? If you don't use it a lot.. I'm not 100% sure.. if you do use it a lot.. then limit your usage, because it might overheat.. I hope this helps at least a bit..

It sounds likely that the cooling fan is no longer functional. If that's the case, consider this guide (also available below) as reference for the installation of a replacement. There's the possibility of another component causing the loss of the fan's functionality, but that would require more thorough evaluation.