[s-cars] Climate Control - Damn the Snowflake

[Vincent Frégeac]

For the HVAC codes, the channel 1 is the most informative. Look here
http://www.12v.org/maintenance/index.php?section=tr&ss=hvac&ch=ccodes&v=1
for the codes.

And a relatively low pressure will just make the A/C less efficient, then if
the pressure is low enough it will activate the low pressure switch that
will turn off A/C. So there's no compressor running on air only.


Vincent

-----Message d'origine-----
De : s-car-list-bounces at audifans.com
[mailto:s-car-list-bounces at audifans.com] De la part de
manuelsanchez at starpower.net
Envoyé : 20 juin 2007 21:34
À : Fred Munro; djdawson2 at aol.com; rit_bellis at hotmail.com;
s-car-list at audifans.com
Objet : Re: [s-cars] Climate Control - Damn the Snowflake

Fred,

Your description is almost exactly what happens to me, at speed snowflake
on, get stuck in a traffic jam, smowflake turns off, jsut when you need it
the most.

So:

Step 1  spray water thru the radiator and condensor from the engine bay

Step 2 Check Belt for tightness

Step 3 Check Fan Clutch

Step 4 Check the sensor that compares engine speed and compressor speed
(where is this beauty by the way, is it part of the compressor or a separate
part, and how much does one cost)?

Step 5 Find VagCom or try Climate Control Codes via CC head (anyone know
which code would be the culprit/what channel)

That sound about right?

Just out of curiosity, what would low refrigerant do, just blow warm air
even though the compressor runs all the time?

Thanks a million.

-manny

---- Original message ----
>Date: Wed, 20 Jun 2007 18:51:21 -0400
>From: "Fred Munro" <munrof at sympatico.ca>  
>Subject: RE: [s-cars] Climate Control - Damn the Snowflake  
>To: <djdawson2 at aol.com>, <rit_bellis at hotmail.com>,
<manuelsanchez at starpower.net>, <s-car-list at audifans.com>
>
>Yup, I'll back Dave's explanation. I've noticed the same thing myself.
Start up the car after it sat outside on a stinkin' hot day, AC engages,
then snowflake goes out and AC disengages before the car is out of the
parking lot. Get out on the street and get some airflow through the
condenser, snowflake comes on and all is fine. Only happens occasionally on
very hot days.
>
>Fred Munro
>'97 S6
>
>
>-----Original Message-----
>From: s-car-list-bounces at audifans.com
>[mailto:s-car-list-bounces at audifans.com]On Behalf Of djdawson2 at aol.com
>Sent: June 20, 2007 5:27 PM
>To: rit_bellis at hotmail.com; manuelsanchez at starpower.net;
>s-car-list at audifans.com
>Subject: Re: [s-cars] Climate Control - Damn the Snowflake
>
>
>Again... higher temps equal higher pressures.  If your A/C is cutting out
only at higher outside temps, my bet is that you're not pushing enough air
accross the condensor.  This could be for several reasons... fan clutch...
electric fan... or a condensor plugged with debris.
>
>
>-----Original Message-----
>From: Rit Bellis <rit_bellis at hotmail.com>
>To: djdawson2 at aol.com; manuelsanchez at starpower.net; s-car-list at audifans.com
>Sent: Wed, 20 Jun 2007 2:19 pm
>Subject: RE: [s-cars] Climate Control - Damn the Snowflake
>
>
>
>I too am interested in the answer to the snowflake question.  My 93 s4 quit
>ooling when it hit 84 degrees or higher all last summer. Then, the car
>elf-healed over the winter.  (only change being a missing belly pan.) this
>ummer (audi gods and thor permitting) the snowfake has kept right on
>orking as the temps hit 95 degrees and higher.  I have long suspected the
>per limit temp sensor, but is there another possible culprit?  Thanks!
>-----Original Message-----
>rom: s-car-list-bounces at audifans.com
>mailto:s-car-list-bounces at audifans.com] On Behalf Of djdawson2 at aol.com
>ent: Wednesday, June 20, 2007 12:59 PM
>o: manuelsanchez at starpower.net; s-car-list at audifans.com
>ubject: Re: [s-cars] Climate Control - Damn the Snowflake
>
>igh pressure, low pressure, and freezing are three I know off the top of my
>ead.  If the A/C works fine under less than extreme conditions, I would
>onder if high pressure is the problem.  I would then look into the fan
>lutch and electric fan operation... these are what keep high pressures from
>eveloping.
>
>----Original Message-----
>rom: manuelsanchez at starpower.net
>o: s-car-list at audifans.com
>ent: Wed, 20 Jun 2007 12:47 pm
>ubject: [s-cars] Climate Control - Damn the Snowflake
>
>Fellow S-heads,
>ll this climate control talk has prompted me to ask the following: What
>auses the Snowflake to turn off by itself: 1. Low Refrigerant (some fail
>afe mode to spare the compressor some unsightly 
>ath)
>. Failing Climate Control Head
>. Other
>he tho must be obeyed is annoyed with me, as my car seems to suffer from
>he 
>owflake and compressor shutting off when it's Africa hot outside. I, and
>ifey, thank you. -Manny 5.5 UrS6 Avant (Flakey Snowflake)
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