Bricktop X PWR
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- MG4 XPOWER
My wild guess: it wants to sample the outside air temperature, to compare with bonnet air temperature, to see if opening the grill will make it hotter or colder. Hence its position in the air stream.
Edit: Slightly confirmed by the story of the flaps opening and closing with the hot air blast.
And there it is!
Why didn't I think of that?
Ex mechanic and everything! ???
Thanks for all the help? Chaps ??