The temperature was a problem on the older Raspberry Pi boards. The Raspberry Pi B+ and Raspberry Pi 2 both run a lot cooler and don’t have this problem.
The temperature of the newer boards hover around 40-50 C. The older boards were around 60-70 C but I have seen some raspberry pi just under 80C.
The Raspberry PI had an auto shut off protection of 85 C.
We don’t have the temperature information to display but we are now showing the piaware.log file on your personal ADSB stats page. Just click on the Log section to expand it. The log file is a lot more useful information to debug problems.
If you are interested you can check the temperature yourself by running