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Date: 14 Mar 2005 09:37:51 -0800
From: "Mike" <michael.straussernospamom>
Subject: Re: Climate control on 96 9000 2.3 LPT CSE


I wonder if the fresh air vent is stuck in the "no fresh air" position. The vent on my 98 9000CSE is controlled by a motor which failed a couple years ago. My symptoms were different in that my problem was that the interior fogged up after 15-20 minutes of driving. However, it seems to me that if the ACC system is tuned for fresh air of a known temperature, and that air does not enter the cabin, unpredictable results will occur. I solved my problem by forcing the vent to the open position and unplugging the motor - since I live in a rural area I don't really need to close off the outside air. Mike KeithG wrote: > OK, I went to the EPC. There is a 'Mixed Air Temp" sensor on the right > side of the main HVAC unit behind the dash. I do not know the best way > to get to this, either remove the glovebox/RHS airbag (on LHD cars) or > maybe through the top after the dash cover is removed. > > I guess this could be bad or just a bit off. I do not yet know if there > is a way it could be better insulated or what, but you may want to see > if you could pick one up in a JY just to see if it behaves differently. > 9k '93-'98 part number 43 18 788. This was a running change in mid '92 > from 96 29 395 which was from '90-'92. Let us know what you learn. > > KeithG > > KeithG wrote: > > I'm watching this thread as well. My '97 does this when it is cold out. > > I have not noticed any oddity when it is hot out, though. Basically, > > after about 1or so hours driving in the winter (cold, here in the > > northern hemisphere) the HVAC starts blowing cooler air. My '95 did not > > do this as far as I remember. The ACC from the 95 is controlling the > > system. I do not think it is the temp sensor in the dash, but probably > > the one further up stream. I do not know where this sensor is, but would > > think it would be on the inlet side of the heater core. If someone here > > has more info on the rest of the ACC system, Please let us know. My > > guess is that it is heat soaking it to the point that the ACC thinks the > > incoming air is warmer than it actually is. > > > > KeithG > > > > Per Laursen wrote: > > > >> "Pidgeonpost" <Pidgeonpostnospambrain.com> wrote in message > >> news:d0vvfu$61a$1nospamg3.svr.pol.co.uk... > >> > >>> Folks...the ACC has started behaving oddly. It works for around the > >>> first > >> > >> > >> 30 > >> > >>> minutes of a journey, though tends to heat the cabin a bit more than the > >>> temperature setting suggests it should. After that time the air > >>> coming out > >>> of the ducts rapidly cools, until even with the control set to 21C it's > >> > >> > >> just > >> > >>> plain outside temperature air. If I crank the setting up to (say) 25C it > >>> will warm up for a while, then it's back to cold again. > >>> So does it just need a gas top-up or is it something expensive? The > >>> compressor is obviously kicking in, so what's left? > >>> > >>> What does the jury think? > >>> > >>> > >>> > >> > >> > >> Have the exact same problem with my '95 (otherwise same car). > >> Asked here a year ago or so - replies covered various good ideas > >> (replacing > >> the cabin temp sensor/fan, resetting the ACC etc) - but none hit the > >> problem > >> :( > >> I see it both in cold (0C) and warm (25C) weather - in warm weather it's > >> definitely not just 'unprocessed' outside air, but COLD. > >> > >> /Per > >> > >>

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