Does anyone know what it means by Grille Position A and Grille Position B? There doesn't seem to be a good explanation. The "A" table looks like what I'd consider normal behavior, open the shutters at lower speeds and close at higher speeds. But the "B" tables don't make a lot of sense. I also notice that with the factory settings running the A/C at idle in the summer heat, the shutters are fully closed but the radiator fans are running. I know it can draw air through the radiator via other parts of the front grille but it seems counter-intuitive to keep the shutters closed in Park/idle with the A/C running. The vehicle is a 2018 Ford Explorer, so it wouldn't surprise me if Ford messed up the factory programming.