Aha. I tested this with new ones as well, and they still get the "Cannot be used..." as soon as they take "Damage". Is it possible that the text shows up all the time? Even though it's fine for being used in the Fluid reactor?
I'm trying to make a fluid reactor and have been following tutorials from the wiki.
However when I add components in my reactor such as heat vents I get "Cannot be used in fluid reactor, please cool down in EU reactor". Has something changed since the wiki tutorial was written? I've tried searching but havnt found anything on this as of yet.
I'm using industrialcraft-2-2.8.30-ex112 on 1.12.2