[s-cars] A/C Cycling on/off...

[Andrew B]

Well, I checked my Aux fan this morning and it does indeed turn on
with the AC.  I have heard before that low refrigerant could cause the
problem, on QW, but it was more in passing than a "Here's your
answer".  I have heard the afterrun pump turn on before, but not
recently.  I'll keep an ear out for it in the future.

I also checked the codes, and the only thing I really found was a
"Belt slip, Hard, sporadic" that would indicate any compressor issue.
Maybe I'll try and get over to an AC shop for a check and refill...

On Tue, Jun 29, 2010 at 4:28 PM,  <djdawson2 at aol.com> wrote:
> Keeping the CC cluster out of the equation for now.... I would suggest that
> if your A/C is cutting out while in traffic or going slow, that your aux fan
> is probably failing to operate.  This means inadequate airflow, resulting in
> high system pressure, and eventually cut-out due to high pressure.
>
> I would check operation of you aux fan (with A/C on) as a starting point.
>
> Dave
>
>
>
> -----Original Message-----
> From: Andrew B <andrew.sb at gmail.com>
> To: s-car-list at audifans.com
> Sent: Tue, Jun 29, 2010 1:41 pm
> Subject: [s-cars] A/C Cycling on/off...
>
> The other day I was driving my 95.5 S6A from Boston to CT, and shortly
>
>
> into the drive I encountered some heavy traffic.  As I shuffled along,
>
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> the A/C kept cutting out.  This has happened before, again in heavy
>
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> traffic, and on a hot day.  Later, after the traffic finally
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> dissipated, the A/C nor Recirc buttons/icons would stay lit, no matter
>
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> whether I stopped and shut the car off or not.
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>
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> When I got to my destination, I left the car until the next day, when
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> I started it up and the A/C worked fine.  A quick drive that evening
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> with the AC on was fine.  Finally, on the trip back to boston (with no
>
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> traffic and slightly ~5* cooler temps) the AC worked the whole way
>
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> home with no incident.
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>
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> Also, late in both drives, my CC cluster became hard to operate.
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> Buttons near the top would not function, but lower ones worked OK.
>
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> This doesn't seem completely related to the traffic problem, as I
>
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> could press the snowflake button, but it turned right off.
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> Any ideas?  There didn't appear to be any overheating issues as the
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> idiot light did not come on and the temperature never climbed off the
>
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> fat line, although is did creep to the hot side of it.  Could my CC
>
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> head be overheating?  Compressor clutch?  There doesn't seem to be any
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> additional noise although the car does drive somewhat more sluggish
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> with the AC on.
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> Would love to find a solution for this...the one place I want AC the
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> most is where it habitually cuts out...
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>
> -Andrew
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>
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