Jetson Nano 2gb SBC thermal zone 4 temperature issue

I have a Jetson Nano 2gb SBC and I want to make sure that it is operating normally before I start learning A.I.
I found that the thermal_zone_4 temperature is constantly running at 100 degrees. The heat sink gets really hot after a few hours.
Is that normal?
If not, what should I do?

Maybe you can check if that thermal zone is always 100 even right after you boot up the device…

If so, maybe you are asking the same question as

Thank you.