RoB: So I guess you can turn up a stove burner on Shabbos? Turn up the brightness on a light with a dimmer? All of the things you mentioned are exceptions because they only might cause more energy to be used. If something definitely causes it, it’s different.
yehudayona: I mentioned the kind with that mechanical switch, but many newer models don’t have that. Like I said, perhaps the Shabbos elevators have it, but it’s becoming rare otherwise.