Heating-Ventilation

[Max Hoepli]

I don't think so, no dripping inside the car, no pooling.

Have had following answer which is most probable cause:

One of the most common causes of cold weather interior fogging in the 5000
series cars is failure of the recirculation flap spring. This allows the
recirc flap to open and recirculation moist interior air. No dry outside air
is drawn in through the H/V system. The recirc flap is located inside the
car under the passenger side dash on the A/C evaporator box. The spring
mount usually breaks off the flap, allowing it to open.
The vents you are referring to allow the outside air pulled in by the H/V
system to exit the car. If they are not open, you wouldn't have any air
flow, but I've never heard of these vents failing. I have heard of lots of
recirc flap failures though.


Max

----- Original Message ----- 
From: "John S. Lagnese" <jlagnese at massed.net>
To: "Max Hoepli" <mhoepli at vif.com>; "Quattro at AudiFans"
<quattro at audifans.com>; "Urq List" <urq at audifans.com>
Cc: <w-t_audifans at yahoogroups.com>
Sent: 18, December 2005 18:49
Subject: Re: Heating-Ventilation


> Leaky heater core?
> ----- Original Message ----- 
> From: "Max Hoepli" <mhoepli at vif.com>
> To: "Quattro at AudiFans" <quattro at audifans.com>; "Urq List"
<urq at audifans.com>
> Cc: <w-t_audifans at yahoogroups.com>
> Sent: Sunday, December 18, 2005 1:39 PM
> Subject: Heating-Ventilation
>
>
> Hello All!
>
> I have a 1986 Audi 5000 Quattro 4 door, the heating works, it becomes hot
> inside car, though the windows can fog, especially in the back, and fogs
> faster when there are more people inside the car. The rear defogger
> functions, when degogger is turned off, the back light will fog, turning
the
> defogger on again, the back light will unfog. The windows have been
tinted.
> When turned on to "Auto" the vents on the left and right edges of the dash
> will unfog side windows in the front, better that center vents be turned
off
> to have more air exiting from the edge vents. At times I am driving with a
> very warm front cabin with temperature showing "HI"  with outside
> temperature of -4C but with foggy windows.
> I wonder if the vent like slots behind the rear speakers below the back
> light have any role in this issue of windows fogging. On the outside at
the
> bottom of C-pillar, just behind rear quarter window, there is a plastic
> covered section, painted the same as the body, I can peek in behind this
> vent like cover. I wonder if this has any role in the fogging of windows?
>
> Any suggestions to the solution of this fogging?
>
>
> Max
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