foged up interior

[gllever]

I have two 2004 cayenne s . One has a problem with instantly fogging up the whole interior after it has been run a while , shut off , and restarted when it is raining. The other one does not have this problem. Do I have a plugged drain some where?

[orthotist]

Sounds like it could be an a/c issue?

[White987S]

Are you recycling the air? This will cause the interior to fog up.

[alw911@ashburnva.net]

turn air re-circulation off.

[deilenberger]

Check under your carpet for wet. The thick foam padding Porsche used can be soaked and you'll never know it from above. The clue is the symptom you describe..

Get back to us with the location you find the water in - and we may be able to point you to which drain is plugged up..

Edited November 14, 2013 by deilenberger

[hahnmgh63]

The drains plugged at the Wet Carpet padding described above or the Recirculation flap, flap motor, etc... are the only two common reasons for this. Always the possibility you've found something new though.

[pancholi]

lots of posts on this..

check for wet carpets. esp the front ones. you will need to pull back the carpet and be sure that the carpet padding is dry.

check the subwoofer area for water/dampness.

clean the front cowl drains if you have not done this already..a must on all cayenne

make sure the other drains ..wiper area,sunroof, under the sill in front of the rear wheels, rear hatch, AC drain hole. are all clear.

also will happen if AC has been on and the switched off. but you mention that it occurs after the rains.

[gllever]

Recirculation is off and the floor is dry . It happens so fast when I start the car it seem the moisture is in the AC/Heater system .

[jagman1]

Clogged a/c drain resulting in a wet pollen filter?

[gllever]

COWL DRAINS I know about the other drains and have checked them, but don't know about the cowl drains . Where are they ? Seem as we cayenne owner need a map of all the drains.

[pancholi]

the cowls are under the front wheel archs .

there are lots of threads on the web re this... also look up for VW Tourag as they have the same issues/system

[royxaxa]

I cleaned up the cowl drains on the weekend. not as bad as I thought.

best way to do it is to remove the wheels and wheel liners. it is kinda cross shaped soft rubber nozzle thingy.

[hahnmgh63]

Just because the Recirculation is off doesn't mean the Fresh-Air flapper is open. The little motor that runs it are known to go bad. You need to pull the under floor cover on the Passenger side and push the button while you watch the motor/flapper and see if it is opening and closing. If you have Durametric it will show a code if it is failed also.