I have a strange one.  We recently added a cisco 3850 stack of three switches.  I'm now getting temperature alerts from Observium.  But when I look at the switches, the temps they report all look fine.

When I look in the sensors section, I can see that the temp is currently 25c, the low is -15 and the warn is 31.  But yet Observium is saying there's a temp issue.  I know I can turn it off, but I'm curious why it's alerting me.