Alien- Cold and Heat

Cruz kept the temperature near freezing in those containment rooms. Although the Xenomorphs were seemingly impervious to extremes, he was hoping that if needed, they could reverse the temperature with superheated fire to shock their systems. Sustained fire would kill them, and repeated shocks to their exoskeletons might make them more docile.
At least, that was Cruz’s hypothesis.
…

The Xenomorph in Containment Room Five had already shown overt aggression. Cruz was having none of it. He spent an hour burning it with flame and freezing it with ice, until finally the hideous beast retreated to a corner and cowered beneath its four clawed hands. One set was pointed weirdly outward. Hoenikker had been afraid that Cruz might be borrowing trouble, but the results were undeniable.

Infiltrator, Chapters 29 and 31