AC Safety Problems

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mcbrue - 25 Oct 2006 04:31 GMT

Driving in a rain storm - coolish outside. Heater goes on - sometime, I
hope!!!!! Hmmmm ... maybe if I just turn the temp setting up and the
vents down. DRAT ! Cool air out the vents and warm air out the floor
vent. Well maybe if I just turn the ac off ... well finaly it starts to
fee a little bit warm. OOPS !!!! Look at that! Have to manualy turn on
the front and the rear defrosters - new experience for me with these
luxury vehicles which normaly seem to take care of that sort of thing
by themselves. Oh well ... the LS430 is supposed to be reliable.

Now the next day on the road again - no rain - warmer outside - auto
thingy on. Getting warm gradualy and getting sleepy cause of the stuffy
cabin. But with the air on - OOPS !!!!! Air is off from last night
!!!!! Well fortunately the micro nap didn't kill us.

Sure am glad that I have such a safe vehicle - lots of engineering, but
engineering for show, not go.

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Ray O - 25 Oct 2006 04:48 GMT

> Driving in a rain storm - coolish outside. Heater goes on - sometime, I
> hope!!!!! Hmmmm ... maybe if I just turn the temp setting up and the
[quoted text clipped - 12 lines]
> Sure am glad that I have such a safe vehicle - lots of engineering, but
> engineering for show, not go.

You should leave the AC on during the rain to dehumidify the air blowing on
the windshield. I leave the AC engaged all year and let the system engage
the compressor as needed.

If you are cool, just turn up the temp and/or use the setting that splits
between the floor and front defroster.

The system is automatic, but not so automatic that it knows that there is a
need to defog the front or rear windows so yes, the driver has to think to
push the appropriate button on the dash.

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Ray O
(correct punctuation to reply)

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mcbrue - 26 Oct 2006 02:58 GMT

Well the whole point of owning a Luxury car is that you don't have to
think! And I never .... er ... nevermind!

I thought the compressor should do it all by itself, but what I realy
freaked on was the split between warm air down and cool air out through
the dash vents! Is there maybe some sort of sensor switch or something
that could be out to lunch or maybe out for a glass of warm sake?

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Ray O - 26 Oct 2006 04:55 GMT

> Well the whole point of owning a Luxury car is that you don't have to
> think! And I never .... er ... nevermind!
[quoted text clipped - 3 lines]
> the dash vents! Is there maybe some sort of sensor switch or something
> that could be out to lunch or maybe out for a glass of warm sake?

There is an interior temperature sensor for each temperature zone, e.g.,
driver and passenger, but AFAIK, there is no separate sensor for up and
down. There is also a temperature sensor for exterior ambient temp,
evaporator/heater core housing, and coolant temp and a solar sensor.

The compressor will automatically come on if the ambient temp is above 32
degrees Fahrenheit and if air is directed out of the defogger vents, but it
should be blended with warm air. I don't have an answer to your question
about why there is a temperature differential between the floor and dash
vents, I would ask the dealer on your next service visit.

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Ray O
(correct punctuation to reply)

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