Windows Misting Up on Gen1 Cayman

[Montcoffer]

Before anyone asks, the recycle button is not on..............my wife's Cayman which we've had from new (2007) has today decided to mist up its windscreen real severely. took 20mins to just about clear windscreen with side windows still dripping wet.
Had a quick play tonight & all the controls for fan, temperature, quick clear button all appear to be operating normally, aircon gets cold, but there is a slight odd whiff of damp air in the car? Has anyone experienced the same?, could I have a heat exchanger failure?, no damp patches on carpet.
That's my limited mechanical guesses exhausted.

[Glassman]

That's a lot of water trying to get out.

Has it had a new windscreen? Is there a sunroof? Could one of the door windows have been left open?

[turboteeth]

Check to see if the bottom of the door cards are wet...

It may have the leak issue which will cause the car to steam up!

[finestjammy]

turboteeth said:

Check to see if the bottom of the door cards are wet...

It may have the leak issue which will cause the car to steam up!

+1

I had similar symptoms when the door membrane seals started to fail.

[Pope]

The carpets may feel dry - if water gets in it goes under the carpet into the foam/sponge on the underside - it can easily hold a few litres and still feel dry on top. Put seats forward and lift the floor carpet where it meets the vertical carpet at the rear.

[t955daytona]

Before you try anything else change the pollen filter for a new one. A girl at work had the same issue with a TT and after I had cleaned out the pollen filter and put a fresh one in it has cleared it up a treat.

[kev b]

Seconding changing the pollen filter, seen this a lot on various cars.

[Montcoffer]

Thanks for advice, much appreciated. I'll post again when/if I find the cause.

[gsewell]

If I remember correctly, Porsche switch off the aircon when the ambient temp drops below 5'C (or thereabouts). This means that any humidity is only pushed out by warm airflow. The result is that if you have been driving the car and then let it cool, the relative humidity is high enough to cause condensation and yes, this takes time to clear away.

[boxsey]

Pope said:

The carpets may feel dry - if water gets in it goes under the carpet into the foam/sponge on the underside - it can easily hold a few litres and still feel dry on top. Put seats forward and lift the floor carpet where it meets the vertical carpet at the rear.

Pope, does the Cayman have rear drains that need checking just like similar boxsters do?

[Pope]

No roof drains as the rear is fixed; runoff is taken down the sides of the lid aperture and out across/through the rear bumper.