[s-cars] AC Question

[Andrew B]

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
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