@Mykle1 said in Rpi3 freezes after a few houres:

Have you tried running only the default modules to see if the problem still occurs? If it does not, add them one by one, or in pairs, until you experience a problem so you can isolate the issue.

This is what I did recently. It wasn’t the pi freezing but the browser on the pi, I am running the mirror on a server. It turned out to be a pi-hole module for me.