Hello, I pick up my Flint 2 and almost just burn of it, go to luci to check temperature and se 80°c 
CPU is only 2% of load.
It's normal for this router to be so hot?
My old Flint is only 55°c in iddle 
In my room is 22°c. And I stick large pads to up router for more ventilation from under, router is in my desk with normal ventilation.
If the foot pads have been added and it is still so hot, confirm the system load is low, check by top?
However, 80℃ is also within a controllable range during the operation of the router, since the CPU performance of Flint 2 itself is very strong, the corresponding power consumption is relatively large, and there is a large piece of heat dissipation patch inside.
As long as the device does not experience down/freeze, crash, etc., it is acceptable.
Also, are you installed third-party firmware? Because the GL firmware does not seem to have a temperature display. But what you said is that your Luci will display the temperature.
Yes, it's been hot with pads, and the load in the web interface and in htop is low, under 2%. I powered it off, waited until it cooled down — it was really very hot. Then I powered it back on and monitored the temperature. For the first 10–20 minutes, it was only 25°C and slowly increased by 0.3–0.4°C every 1–2 minutes. After 2 hours, it reached 46°C and stabilized. It's my bad that I didn't take screenshots of the temperature and load issues.
I don't understand what exactly caused this extreme overheating.
I use GL.iNet official firmware 4.7.0 (OpenWrt 21.02-SNAPSHOT r15812+1082-46b6ee7ffc).
I added some third-party community packages like qbittorrent, torserv and other:
For CPU monitoring
screens for now
Related topic - I have been trying to get the luci-app-statistics graphs to show thermals as in this forum thread and while I got the cpu load and wireless graphs, I am struggling with the cpu temp graph.
I have installed the following plugins as mentioned in that thread:
luci-app-statistics
collectd
mod-sensors
But in the Luci Statistics Setup page there were no sensors listed to select. Then I did some more Googling and installed collectd-mod-thermal, which although also does not list any sensors to select in the setup, does display a new Thermal tab with a graph titled 'Temperature of Therm Zone 0'. I am not certain if this reflect the cpu temperature or perhaps some other sensor inside the case.
In any event, I cannot replicate the graphs of the various sensors as shown in my example link above. Also, if I go into the terminal CLI and check for sensors, it says none found:
root@GL-MT6000:~# sensors
No sensors found!
Make sure you loaded all the kernel drivers you need.
Try sensors-detect to find out which these are.
root@GL-MT6000:~# sensors-detect
No i2c device files found.
What am I doing wrong? How do I show the same temp graphs from the example link?
Thanks!
What is the power setting on wifi frequencies? My prior Asus would get warm on 100%. I think I read where you can go over 100% in Flint 2 even. I take my phone with a wifi scanner and walk around to see how far I really need it to go.
hmm you right, when temp is 80°C Wifi 5(6) is on max. I ask gpt about this temp issue and they said that can be a wifi power, so i turn in to medium, but temp is any way don't going down, so i reboot and forget about it. 
Now with medium - Wifi 5 and high - 2.4 i have 49.6°C
I just try install it, its works, except temp monitor don't show or i don't understand how setup it. Clear you browser cache, in my ff its dont show until i clear it.
I cleared my browser cache but still only get the 'thermal_zone0' sensor - not sure if that is cpu?
Also checked - both my 2.4 and 5GHz WiFi radios are set to MAX and current temp avg is 50.2'C
EDIT - my Flint 2 is mounted in a small closet space with door closed, so not really the best air circulation. 50.2'C in this environment seems pretty reasonable to me if displayed reading is correct for cpu. Judging by touch, that feels about right - warm but not hot.
1 Like
Yes zone0 is CPU, it's only one enable sensors in flint2. In Flint I have 2 or 3 sensors.
Also the are very good service if you like graphics, it's calls "Netdata" theare many of stats in there, but it's not installed from official repo, there is some package on GitHub. But now it's only for owrt 23-24, and don't have some dependanse in owrt 21, so it's little bit hard to install on glinet owrt 21, and can't be installed in Luci gui.
Just like web service only on port 19999.
And it's eat more resources memory and cpu.
1 Like
Flint 2 really needs reboots to fully trust changes.
For now, wifi 5 on high and 2.4 is on max. I did reboot.
Temperature is up from 46 to 50°.
Up wifi 5 again to max is little bit scary 
Hello,
This operation temperature around 51℃, it is normal for high-performance routers, there is no need to worry.
Our testing routers are 70℃ without fan for a long time.
1 Like
Do you need high power?
@bruce 80°C is normal when the WiFi 5GHz is on max?
Seem wasn't expected.
The default setting of 5GHz TX Power is the max, my Flint 2 is about 55℃.
*Depending on the ambient temperature.
Although this temperature curve is not corresponding for max but high of TX power, it is still within the expected range.
If WiFi usage is relatively high, like transmission load is large, the temperature will rise.
If always over 80℃, try to move the router to a ventilated place.
1 Like
My temperature is 57-58, constantly. However, I have 3 disks connected, 2 SSD and 1 HDD, via USB hub with external power. My IP camera records video ≈170mb to HDD every 10 minutes.
TX power is Max.
Is this temperature normal?
Yes, it's normal.
But just keep in mind that your router is a router and not a NAS