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

[Andrew B]

Also, how do I clear the codes?  Battery?

On Wed, Jun 30, 2010 at 6:21 PM, Andrew B <andrew.sb at gmail.com> wrote:
> Well, I checked the belt and it looks worn, but not cracked.  My
> receipt from the shop where I had work done includes a serp belt on
> the list (and I was charged for it) so I assume it was done (part of a
> complete head replacement).  It is tight without much play.
>
> I checked the codes again today, same sporadic blocks, same sporadic
> hard slip, and the 223 high pressure switch sporadic.  The new one was
> 22.5, high pressure 120x open.  The radiators do look clean and
> healthy, with no holes or bent fins or dents.  Some debris, but not
> much.  Nothing on the 52C graphics channel indicated anything.
>
> Also, when I checked the engine temp channel 51C, it read 5o.  The
> engine was not warm, but is that supposed to be in C or F or is
> something screwy there?
>
> -Andrew
>
> On Wed, Jun 30, 2010 at 4:55 PM, Thomas R Green <trgreen at comcast.net> wrote:
>> 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
>>
>>
>