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I have an 03 Cayenne S. Now the cold weather has arrived I have noticed that on a cold start, that the front windscreen mists

up very quickly.

So I push the Front Windscreen Demister, but it is a case I need to drive the car for half a mile, or about 2 minutes before the

blowers kick in and clear the windscreen very quickly. Once this happens it is fine, until I stop again, leave the car until the

next cold start and have the same problem again.

Finding that I need to drive with front windows and sunroof open which isn't ideal until the blowers kick so I can at least drive,

just about.

Bought the car in December last year and did notice this problem, but was hoping that the fault would resolve itself, but

thinking about it, the same situation in the Summer is that it would take half a mile or about 2 minutes before the

Air Conditioning would kick in ??

Once covered the intitial distance, not a problem with temperature or control of the flow.

Any thoughts would be appreciated

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Inspect the drain for the air box for blockage and the condition of the cabin filter. It sound like you may have excessive moisture collecting in the climate control air plenum. I believe the fan will only come on once the coolant temp has reached a determine level.

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