No air box on this one it has a k&n type filter, i guess you meant inside the box where the filter would be? No warning lights come on and no overheating temp stays bob on the middle.
Sorry I don't mean anything like that. I've probably got the wrong name. I mean the network of stuff behind your dash used to direct the air about. Heater Matrix perhaps?
Anyway, on my corrado there was a flap operated by the heater controls and as it had slipped or been set up wrong, I couldnt stop the cold air from flowing.