Power usage is 100% transformed in heat. Try to add some efficiency modules.
this is the start of the game, there are no efficiency modules.
ok good to know its just how it works. Its a bit of a noob trap, and bit of a RTFM not seeing how much heat it outputs. From a gameplay perspective it seem off to make heat when it's waiting for X, but i can see now that its doing work even if it don't seem like it.
The reason is that if the machine only used energy while literally crafting, like most assemblers, then the reported energy usage and heat production would be much higher than the actual. Since when you run the machine, it only crafts one tick at a time, every few ticks.
(which is how it used to work, and it didnt feel good in gameplay, epecially since, more complex problems take longer to solve, and would end up using less energy and produce less heat which makes no sense)
The current functionality is a compromise; it's not without flaws, as you have experienced. But there isn't a better option. Since the game can't know when you're actually solving a problem, vs just having the machine ready. (not without massive exploits being possible, at least)
Hopefully, that explanation seems fair?