Cpu-temp thermal_zone switching

Configuration
1

I having some issues with cpu-temp measuring. I migrated to a NUC5I5MYHE not long ago and used this for cpu-temp:

command: “cat /sys/class/thermal/thermal_zone2/temp”

Then I installed a 7265 NIC and it started switching. Sometimes its thermal_zone2 and sometimes it’s thermal_zone3 - this seems random after reboots. What’s going on, and how do I find non-changing cpu-temp “address”?

Thanks!