General aircon question.
 

Can anybody tell me why cars with aircon are more likely to fog up inside than cars without it?

OK, this is a stupid question to ask on a US site, you guys have no experience of cars without A/C.

In the early 90s very few cars in Ireland would have had aircon, except possibly the Merc S class and a few others. In contrast to this, most imported cars from Japan come with Aircon. It seems to be on all Japanese cars, but curiously even their top models do without driver airbags which are common here.

We have two Japanese import cars, both of them fog up inside, the Honda particularly badly.

Is there a drain plug on an evapourator that gets clogged, does the matrix get clogged with dirt or what causes the hot damp air to fill the car when parked?

This is noticable failure on most older imported cars, but my brother has a 99 Honda Accord which does the same, he is thinking of getting rid of it for a Volvo the problem annoys him so much.

What gives?? Is there a cure?

Thanks in advance

Joe:confused: