[s-cars] AC Question

[Douglas Fifield]

I have been running without the primary fan (w viscous clutch) for
about 3 years now.  I have a replacement in the "rossoto" bin, but
have been waiting until I have to pull the front end off for some
other job to replace it.

The secondary fan does not come on.  I have checked the fuses in the
driver's kick panel and they are OK.  I removed the driver's headlight
and checked both green connectors.  They looked OK and I put them back
together with a little dialectic grease.

I pulled the relay in the plenum tray, cleaned the contacts and put it
back with dialectic grease. The fan still does not come on.

It is at the shop now where they are checking the refrigerant levels.
I will let you know more when I have more.

D.

On Thu, Aug 11, 2011 at 9:44 AM, Andrew B <andrew.sb at gmail.com> wrote:
> Did you check the on-board CC code diagnostics?  Best place to start.
>
> My bet is a high-pressure cutoff.  My guess on the solution is a bad viscous
> fan if the electric fan is working (it should turn on when you turn the AC
> on at idle).  If the electric fan isn't working, check the relay first, that
> has a fuse that was blown on my car.  If the fan is working check the fan
> clutch by driving around the block till the engine is warm, parking the car,
> shutting it off and spinning the fan.  It should be difficult to move, not
> easy/free spinning.
>
> I fought with the AC for a while on mine before figuring these things out.
> It's probably also what led to the cylinder head popping before I bought it.
>
> On Mon, Aug 8, 2011 at 12:07 PM, Douglas Fifield <douglas.fifield at gmail.com>
> wrote:
>>
>> Hedz,
>>
>> Patient is a 95.5 S6A with a little over 150K on the clock.  The
>> compressor began cycling on and off during a recent high temperature
>> road trip.  First noticed this when coming to a stop in a small town.
>> At highway speeds the compressor light came back on and the AC blew
>> cold.
>>
>> This cutting out behavior persisted and increased in frequency.  Now
>> it will not come on at all.
>>
>> Searched the archives and found similar complaints that were diagnosed
>> (but not proven) to be one or more of the following:  insufficient air
>> being pulled past the condenser due to an inoperative secondary fan,
>> low coolant, seized compressor and serp. belt wear.
>>
>> On my car, the secondary fan did not come on with the AC set at LO (no
>> compressor either).  I have been running without a primary fan for
>> about two years now with no discernible problems.
>>
>> I plan on having the AC checked for coolant.  Can anyone suggest where
>> to look for tracking down the non-operative secondary fan?
>>
>> I know zip about the AC system so any help is appreciated.
>>
>> Thanks,
>>
>> D.
>>
>> --
>> Douglas in MN
>> 95.5 Audi S//6 Avant
>> 08 Prius Touring (50 mpg reg)
>> 73 BMW R60/5 mit Toaster Tank
>> 82 BMW R100RT mit Russkie Sidecar
>> ABC# 11822
>> _______________________________________________
>> S-CAR-List mailing list
>> http://audifans.com/mailman/listinfo/s-car-list
>> http://www.audifans.com/kb/List_information
>
>



-- 
Douglas in MN
95.5 Audi S//6 Avant
08 Prius Touring (50 mpg reg)
73 BMW R60/5 mit Toaster Tank
82 BMW R100RT mit Russkie Sidecar
ABC# 11822