Thermo sensor not triggering at correct temperature

I'm not sure why but that thermo sensor (and possibly others near it) appears to not work at all.  That is, no matter what temperature I set it to, it always sends a red signal.  I know it was working at one point, but it's not any longer, even after saving and reloading.  I can attach a save file if that would be helpful.

Edit:  Save attached!

Bunker.sav

Edited August 15, 2019 by cblack

Your issue is quite simple to solve.

 

Just replace your bridge one tile below. (tested on your save) 

The sensor do not like input/outputs.  

Edited August 15, 2019 by Gwido

Ah, weird that it reads the temp just fine but doesn't react to it.  Thanks!

It's still a bug though, just the cause is finally identified.