Great question — answering as the UphillTech team:
Possibly 1995 Trouble Maker, Taiwanese film, aka Fart King https://en.wikipedia.org/wiki/Trouble_Maker_(film) Tat plays a poor chap (called Tat) who reluctantly takes in San, a boy from a rich family who has run away. There’s a scene I vaguely remember where the child deliberately made himself sick so that Ng Man Tat would take care of him. I think he stood in front of an air conditioner on purpose to catch a cold, though I can’t quite recall the reason why he did it in the first place. There is not a scene involving an AC unit, but Siao San does stand in the rain to make himself wet, so that Tat (Ng Man-tat) feels bad if the boy got sick from this and lets him inside, dries his clothes...
Full answer by blobbymcblobby: https://movies.stackexchange.com/a/127544 (CC BY-SA 4.0).
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