Bill,
As always, thanks for your thoughts. The air that is exiting the
defroster
and the heater are definitely warm to hot. They can fully warm the
vehicle
if I drive ~25-30 minutes with an outside air temp of -6F. I will have to
take a look a the blend door when the weather gets warmer. Is there
supposed to always be "some" leakage to the wind****eld defroster vents
even
when on the heater setting? All I can figure is that nothing at all gets
directed there and the extreme cold, coupled with the vehicle speed is
chilling the wind****eld. If I heat the passenger compartment using the
heater setting, then the moisture from my breath is being absorbed into
the
warmed air and then condensing on the cold wind****eld and side windows.
Only when the setting is moved to defrost and after the wind****eld and
side
windows warm sufficiently does the condensation stop and I get regular
visibility.
If anyone has any other thoughts, let me know!
Bob
"Bill Putney" <bptn@[EMAIL PROTECTED]
> wrote in message
news:61cc6bF1t0q30U1@[EMAIL PROTECTED]
> Bob - You seem to have just about covered most of the bases. One thing
> you danced around a couple of times but without really stating
explicitly
> is if the air that is coming out of the correct vents is actually warm
or
> not. Since you appear to have eliminated that moisture is leaking into
> the ducting from the heater core and confirmed that the a.c. is working
in
> defrost mode, I am going to assume that the problem is that the air is
not
> getting warm.
>
> Three possible causes that I can think of, and I have read on the LH car
> forums of all three of these occurring:
> (1) The heater core is clogged, so, even though your engine is cooling
> fine, the coolant is not circulating thru the heater core.
> (2) Your coolant may be low or have an air pocket (actually they are one
> and the same) - leaving you enough coolant to cool the engine fine, but,
> again, leaving the heater core without circulating warm coolant.
> (3) The blend door is not operating correctly. That door is a vane that
> determine what pro****tion of the air forced by the fan is going thru the
> heater core fins vs. going around (bypassing) the heater core.
>
> That's my best shot. Obviously the best scenario would be no. (2) or
> (3) - and they are both definitely possible. Like I said, I have read
> many posts by people on the LH car forums where any one of the three has
> happened.
>
> If the air coming out of the ducting is in fact warm, then, with your
> having covered the other bases, I'm at a loss as the things I came up
with
> only address the air coming out of the ducts not being warm.
>
> Bill Putney
> (To reply by e-mail, replace the last letter of the alphabet in my
address
> with the letter 'x')
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