[urq] RE : : A/C - fan always on?

[Louis-Alain Richard]

Eric's 1985 has a rebuilt AC system from an Audi dealer, (you can
imagine the bill...) and his fan cycles on/off. So if they did it right,
we can assume that is a normal behaviour.

Now, when he got the car, the AC was real noisy, from the compressor
area. First I thought that the compressor was dead, but it was blowing
cold air... When I looked under the car, I saw something that made me
wonder why they are billing 95$/hour. The new condenser (1300$) was
correctly bolted to the main radiator, but the lower rad grommet was not
tighten to its support, so the big bucks condenser was rubbing on the
compressor, explaining the metallic noise we were hearing... A couple
weeks later, and the condenser would be shot... Monkey lads even at Audi
?

So I decided to replace the 30$ (???) bushing, just to discover that it
was rusted in place... Then I broke the stud in the rad it while trying
to unwind it... I had to bring the rad to a shop that rethread the hole
in the bottom bracket. 60$ later and now the AC is quiet as the one on a
new car. And the fan cycles... 

Louis-Alain



> -----Message d'origine-----
> De : urq-bounces at audifans.com 
> [mailto:urq-bounces at audifans.com] De la part de Ed Kellock
> Envoye : 9 juin, 2006 11:23
> A : urq at audifans.com
> Objet : Re: [urq] : A/C - fan always on?
> 
> 
> My '85 urq does not run the rad fan automatically when the 
> a/c is switched on, but given the condition of it when I 
> acquired it, I wouldn't be surprised to find a melted relay 
> as mentioned by someone.
> 
> Ed
> 
> 
> On 6/9/06, Andrew Finney <afinn1 at gmail.com> wrote:
> >
> > I just sold an '85 4000Q with perfectly working AC and it 
> cycled the 
> > fan on and off too. If you look at the wiring diagrams for 
> the early 
> > AC (found in the Haynes manual) and compare it with the 
> diagrams for 
> > the later style AC system in the Bentley you'll see why it 
> cycles on 
> > and off. Doesn't mean having the fan on high all the time 
> isn't good 
> > for the overall cooling of the motor, which is taxed with 
> the AC on, 
> > but I'm almost positive that's not
> > how it works on the later cars. I'm sure that's how it 
> works for the older
> > cars.
> >
> > Andrew Finney
> > 1983 and 1985 UrQs

>