As subject. I had a carful of passengers yesterday and the windows fogged
up. Haven't noticed this before and wondered if the AC is faulty. If the
weather was warmer I could put the AC onto "LO" and feel the cold air coming
through, but with the temperature under 5 degrees C it doesn't seem to make
any difference if the "Econ" button is on or off.

Any advice much appreciated.

 

"Paul" <newsgroups1_5@hotmail.com> wrote in message
news:u_cmb.746$lp6.459@newsfep1-gui.server.ntli.net...
> through, but with the temperature under 5 degrees C it doesn't seem to
make
> any difference if the "Econ" button is on or off.
>
That is actually quite likely, because in quite many cars compressor engages
only above 3-5 degC.

- Juha -

 

"Paul" <newsgroups1_5@hotmail.com> wrote in message
news:u_cmb.746$lp6.459@newsfep1-gui.server.ntli.net...
> As subject. I had a carful of passengers yesterday and the windows fogged
> up. Haven't noticed this before and wondered if the AC is faulty. If the
> weather was warmer I could put the AC onto "LO" and feel the cold air
coming
> through, but with the temperature under 5 degrees C it doesn't seem to
make
> any difference if the "Econ" button is on or off.

In the A3 at least, the aircon is disabled if the outside temperature is
below 4 deg C.

 

Thanks - that must be what it is. (Car is an A6 BTW - sorry should have
said). I use AC for dehumidifying rather than cooling in cold weather
though. It's a bit of a pain to be disabled.


"Graham" <me@privacy.net> wrote in message
news:bnbnos$vdhkm$1@ID-158414.news.uni-berlin.de...
>
> "Paul" <newsgroups1_5@hotmail.com> wrote in message
> news:u_cmb.746$lp6.459@newsfep1-gui.server.ntli.net...
> > As subject. I had a carful of passengers yesterday and the windows
fogged
> > up. Haven't noticed this before and wondered if the AC is faulty. If the
> > weather was warmer I could put the AC onto "LO" and feel the cold air
> coming
> > through, but with the temperature under 5 degrees C it doesn't seem to
> make
> > any difference if the "Econ" button is on or off.
>
> In the A3 at least, the aircon is disabled if the outside temperature is
> below 4 deg C.
>
>

 

> > In the A3 at least, the aircon is disabled if the outside temperature is
> > below 4 deg C.
> Thanks - that must be what it is. (Car is an A6 BTW - sorry should have
> said). I use AC for dehumidifying rather than cooling in cold weather
> though. It's a bit of a pain to be disabled.

It is, but from my limited knowledge, I believe its to prevent damage to the
system if it was to try to force it to work when it could be frozen up. The
demist function still works a treat in cold weather though. Couldn't do
without it!!

 

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Graham wrote:
> "Paul" <newsgroups1_5@hotmail.com> wrote in message
> news:u_cmb.746$lp6.459@newsfep1-gui.server.ntli.net...
>> As subject. I had a carful of passengers yesterday and the windows
>> fogged up. Haven't noticed this before and wondered if the AC is
>> faulty. If the weather was warmer I could put the AC onto "LO" and
>> feel the cold air coming through, but with the temperature under 5
>> degrees C it doesn't seem to make any difference if the "Econ"
>> button is on or off.
>
> In the A3 at least, the aircon is disabled if the outside temperature
> is below 4 deg C.

Really!? In every American car I've ever owned the A/C compressor kicks in
whenever "Defog" is selected on the vent control, regardless of whether the
temperature is 80F or -20F. The purpose, obviously, is to remove moisture
from the air to help clear the windshield. I've never had a problem with
fogging windows in my Audis (the only non-American cars I've ever owned),
but then again nobody every wants to ride in them but me. (Come to think of
it, nobody ever wants to ride with me no matter *what* I'm driving. My
mother-in-law jokes about wearing a blindfold whenever I drive her
anywhere.)

- Greg

--
1976 Cadillac Fleetwood 9-passenger sedan
(for sale: http://www.dataspire.com/caddy)
1989 Audi 200TQ sedan
2000 Oldsmobile Intrigue
2001 Chevy Astro AWD (wife's)




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I have the same problem with an A6 - windows always mist up when the demist
function is used!! If you solve the problem please let us know.
Thanks
Chris