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

[Thomas R Green]

The sooner the better.  If there is indeed a "hard slip" occurring  
even sporadically
It means the belt is really bad or the compressor is headed for  
failure.  It could be
making metal already;  something you really don't want.  You want to  
write down
the code and then clear it to determine if the event still happens.   
If it is just the belt,
that could be bad also since belt pieces can fly everywhere.

Tom


> -----Original Message-----
> Date: Wed, 30 Jun 2010 09:45:27 -0400
> From: Andrew B <andrew.sb at gmail.com>
> Subject: Re: [s-cars] A/C Cycling on/off...
> To: djdawson2 at aol.com
> Cc: s-car-list at audifans.com
> Message-ID:
> 	<AANLkTil5WryjLfPL4uLqZGO2UXBpqgSzIGIsvdLp7enM at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
>
> 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,
>>
>>
>> the A/C kept cutting out.  This has happened before, again in heavy
>>
>>
>> traffic, and on a hot day.  Later, after the traffic finally
>>
>>
>> dissipated, the A/C nor Recirc buttons/icons would stay lit, no  
>> matter
>>
>>
>> whether I stopped and shut the car off or not.
>>
>>
>>
>>
>>
>> When I got to my destination, I left the car until the next day, when
>>
>>
>> I started it up and the A/C worked fine.  A quick drive that evening
>>
>>
>> with the AC on was fine.  Finally, on the trip back to boston (with  
>> no
>>
>>
>> traffic and slightly ~5* cooler temps) the AC worked the whole way
>>
>>
>> home with no incident.
>>
>>
>>
>>
>>
>> Also, late in both drives, my CC cluster became hard to operate.
>>
>>
>> Buttons near the top would not function, but lower ones worked OK.
>>
>>
>> This doesn't seem completely related to the traffic problem, as I
>>
>>
>> could press the snowflake button, but it turned right off.
>>
>>
>>
>>
>>
>> Any ideas?  There didn't appear to be any overheating issues as the
>>
>>
>> idiot light did not come on and the temperature never climbed off the
>>
>>
>> fat line, although is did creep to the hot side of it.  Could my CC
>>
>>
>> head be overheating?  Compressor clutch?  There doesn't seem to be  
>> any
>>
>>
>> additional noise although the car does drive somewhat more sluggish
>>
>>
>> with the AC on.
>>
>>
>>
>>
>>
>> Would love to find a solution for this...the one place I want AC the
>>
>>
>> most is where it habitually cuts out...
>>
>>
>>
>>
>>
>> -Andrew