Do any of you living in humid areas get condensation on the lower part of the windshield with the inside climate set to auto/68-70 degrees? 72 degrees seems to keep the windshield dry but I hope I'm just missing a setting or something like that.

I do not know why the max air functions sends air to the windshield. Just turn it off. My car has the standard controls, no auto climate. The last button to the right bellow the AC panel, controls the air flow to the windshield, (defogger), in my car. You can toggle it on or off. In my car when you turn AC max it blows cold air to the windshield and generates condensation on the outside. When I first got the car I was constantly using the wipers.


Check your owners manual since your AC controls might be different.

__________________
Having fun in Puerto Rico

I do the same thing as Jaica. As soon as you turn on MaxAC, turn off the defroster vents and the condensation won't appear.

I'm not an AC person unless I'm with a girl. I usually have the windows down. Saves gas too.

__________________

Mike
2006 Midnight Blue Cayman S

I've noticed the very same thing in my car lately. Thanks for the post and the inputs.

I was always under the impression that driving with the windows down upset the aerodynamic balance enough to negate the benefit of turning the AC off. This is more prevalent in less aerodynamic vehicles such as an Expedition. I would expect the effect to still be present in a Cayman.

It doesn't seem like I can keep the vent from blowing on the windshield even at partial fan speed with the auto climate control on. The defogger can be toggled on (which indicates off usually) but that removes the auto indicator.



I believe the new Car & Driver has an article about driving for fuel economy and they tested a car that got better crusing mileage with the windows down than with the AC on.

I ahve the same condensation issue - and have Auto Cliamte. I just toggle off the upper vents and the problem is gone. I guess that takes away some of the 'auto' nature of things, but it solves the issue. Glad to see the topic come up though.

This is really quite annoying. I dont suppose there is anywhere much worse to live than Houston in August to experience this.... but I feel like I have an unwanted 'heads up display' of condensation every morning on the way to work.


- Yes, you can switch off the windshield vent and it stops.... but then its not 'auto'...


- Yes, you can set the temp up to 74 and it helps..


- Yes, you can keep using the windshield wipers to clear it...


BUT.... why is this the only car that I've been in that does this! I guess the solution would be to alter the mix of the amount of air which is directed to the windshield while in the auto position.... I wonder if there is a way for Porsche to do this?

My '96 C4 had the same problem when I lived in Houston. The best solution was to move to Santa Fe[img]/fckeditor/editor/images/smiley/MWPX/tounge_smile.gif[/img]. As a small aside so did other non-US makes (except for MB)that I owned when living there. The only solution that really worked was to drive a few miles with the windows down but in Houston in August that means you need a new shower.

I just push the botton to send the air to my feet. I know this flies in the face of thermodynamics, but the cabin is so small it cools down fine and it seems to close off the defroster vents. Also, I believe the auto temp is still engaged, even though the 'Auto' light goes out -- my fan is still moderated based on the amt. of sun making it into the cabin so it seems to be minding the temp sensor.

exact same problem with auto ac in florida.

god bless texas

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This is really quite annoying. I dont suppose there is anywhere much worse to live than Houston in August to experience this.... but I feel like I have an unwanted 'heads up display' of condensation every morning on the way to work.


- Yes, you can switch off the windshield vent and it stops.... but then its not 'auto'...


- Yes, you can set the temp up to 74 and it helps..


- Yes, you can keep using the windshield wipers to clear it...


BUT.... why is this the only car that I've been in that does this! I guess the solution would be to alter the mix of the amount of air which is directed to the windshield while in the auto position.... I wonder if there is a way for Porsche to do this?
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This has been and problem/issue with all the auto climate control systems in the Boxster, 996, 997, Cayman (not sure about the Cayenne). As stated above the condensation occurs because of too much cool air being sent to the dash. Same problem was occuring in some VW/Audi's, but VAG did a firmware update to fix the problem...however, PAG has shown no effort in this area. I kept thinking Porsche would cure the issue with the 987/997 and Cayman, but it did not happen. It appears the best solution is not get the 'Automatic Climate' control option. I never use the 'Auto' feature on my 996 in the summer because of this problem.

Edited by - bet on 08/03/2006 08:54:30 AM

__________________
Brian

I do not have the auto climate control however, in the week since I've had the car, anytime I turn on the AC with the air flow directed to the lower or mid level outlets, there is substantial 'leakage' from the defroster vents with the resulting windsheild condensation.Occasionally the vent outlet selector does fully close and the defroster 'leakage' is not present. When this happens, there is noticably greater airflow from either of the two alternate outlets. Apparently the vent control is is not shutting properly. I'm going to bring this up with dealer.


Cheers,




Edited by - Morefun on 08/03/2006 3:09:52 PM