[s-cars] RE: HVAC display problems (suggestions please) +Samco MM availabl e

[bob.rossato at att.net]

James,

I agree with you.  If you are having only a partial readout of the display, that is completely unrelated to the ignition switch failure.  A failed ignition switch will cause it stick in the 'START' position, or part way between 'START' and 'RUN'.  While in the 'START' position power is completely disabled to high current draw items, such as the HVAC, via the X-Cutout relay.  You can't have partial power to only some elements of the display from this failure mode.  It's all or nothing.  To confirm that it is not the ignition switch you should check to see if you can turn on your headlights and turnsignals.  I would venture to say they work just fine, indicating the switch is not the source of your problems.

Bob

-------------- Original message from "James Murray (QB/EMC)" : -------------- 

> Okay... I don't doubt you guys with the switch issues, but I don't think my 
> symptoms are the same as yours... but just to be sure I want to ask you 
> following: 
> 
> When your switch was starting to fail, was the HVAC completely blank (i.e. no 
> numbers in display) or only partial numbers? 
> My issue is that 2 or 3 segments of the 8 segment LCD is not lighting up (always 
> the same bottom ones), but on rare days they decides to work... I think it has 
> something to do with humidity but not sure. 
> 
> If you had the same symptoms, then I will replace my switch without further 
> question... I just have a hard time to accept the ignition switch causes the 
> blanking of individual segments of an LCD display... 
> 
> /J. 
> 
> -----Original Message----- 
> From: Airbil at aol.com [mailto:Airbil at aol.com] 
> Sent: Tuesday, August 24, 2004 12:17 AM 
> To: s-car-list at audifans.com 
> Cc: James Murray (QB/EMC) 
> Subject: HVAC display problems (suggestions please) +Samco MM available 
> 
> 
> OhJaMu, 
> Allz I can tellz ya is that this was in fact the only 
> symptom I had that something was amiss, prior to my no 
> start condition which lead to cold chinese food, a tow 
> job and then ignition switch, starter replacement:( 
> Shortly after changing my ignition switch, I also changed 
> it on my sisters 92urS4 and whilst it still worked, the 
> nylon/plastic housing was cracked in the classic manner. 
> Search the archives for more evidence such 
> as this from the oh so slow A6 list "(The symptoms being 
> intermittent failure of headlights, turn signals, climate control, etc.) This 
> combined with the switch have a "tight" feel to it I mentioned before." 
> http://www.audifans.com/pipermail/quattro/2002-September/061659.html 
> Again its, 35 bucks, takes but an hour and if you havent 
> done it, its in that guaranteed to fail at some point category. 
> HTH MTFBWU (may the force be with you!) 
> Cheers 
> Bill m