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Posted by Elmo P. Shagnasty on April 4, 2007, 7:06 am
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> > Does anyone know what the light sensor at the front corner of the
> > dashboard top is for?
> >
> > It is mentioned in the handbook in the section describing the air
> > conditioning, under "Tips" - basically "don't cover the sensor".
> >
> > I can't think why the a/c needs to know whether it's light or dark
> > outside.
>
> It's the solar gain sensor for the climate control system.
>
> The climate control system uses some form of fuzzy logic to decide the
> auto climate control settings.
>
> You'll probably feel warmer with the noonday sun beating down at you,
> than if it was overcast outside, even for the same outside
> temperature. The same sun that makes you feel warm will also be
> trying to warm up the interior (so in the summer with the AC on the AC
> would have to be on cooler or a faster fan speed than if it wasn't
> sunny).
It's also the auto headlight sensor, for cars so equipped.
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