I would never have thought about this fact about electronics, though it seems obvious after the fact. How many sci-fi writers have made this blunder about their robot characters?
Though technically Helix doesn’t need air to survive, he just needs it to function. I’m sure he’s got some sort of thing that makes him shut down if his chips overheat. Then they’d cool (albeit a lot more slowly than normal) via radiant energy.
From the webcomic Freefall.