I made the mistake of performing a hard shutdown 5+ times while the node was running. Temp reading was working normally after first few boots.
Now, dashboard under Miner reads:
"There is a problem fetching system stats (Internal error)."
I lost internet and was managing my unit remotely, also had no other option but to power it off the old fashioned way.
Ended up with the same issue as you, asked about it extensively on here but never got a solution.
Magically without explanation it all started working again about 2 months later.... so who knows, but I don't think its bricked.
Mine still mined and function properly, just lost all the system stats in the dashboard.