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

[Brandon Rogers]

It seems you are right Andrew- the 84/85 cars cycled the fan on and off.
What I don't like tho is that the even later cars -'91 200 20Vs, and now
the A4's etc etc went back to constant fan use - by turning on the
secondary elec fan, in addition to the primary clutched fan which
_always_ turns w/ the motor - so these later car _always_ have airflow
through the radiator...

I like that, personally.  Hence my thoguht for a manual fan switch...

Brandon

-----Original Message-----
From: urq-bounces at audifans.com [mailto:urq-bounces at audifans.com] On
Behalf Of Andrew Finney
Sent: Friday, June 09, 2006 8:49 AM
To: djdawson2 at aol.com
Cc: urq at audifans.com
Subject: Re: [urq] : A/C - fan always on?


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


On 6/8/06, djdawson2 at aol.com <djdawson2 at aol.com> wrote:
>
>   On my past '85, the fan came on all the time with the A/C on.  My 
> current '85 had the A/C pulled, so I can't comment on it.  We also 
> have an '86 Coupe GT in the family, and it comes on constantly with 
> the A/C switched on as well... FWIW.
>
> I would still suggest that if your fan isn't on all the time with the 
> A/C engaged, that you fix it so that it will.
>
> Dave
>
> -----Original Message-----
> From: Andrew Finney <afinn1 at gmail.com>
> To: urq at audifans.com
> Cc: djdawson2 at aol.com
> Sent: Thu, 8 Jun 2006 16:54:33 -0700
> Subject: : [urq] A/C - fan always on?
>
>  The pre'84 cars had the fan on at all times with the AC on. If yours 
> does not turn on, one of the relays is likely melted in the glove box.

> '84 and later cars had a pressure switch up near the radiator that 
> turned the fan on and off as necessary through various other circuits.

> If I'm wrong on this, please let me know, but I've owned '83, '84 and 
> '85 UrQs and have spent many $$$ dealing with AC issues.
>
> Andrew Finney
> 1983 and 1985 UrQs.
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