hi having problems with my van the windscreen been misting up when its raining and when you put the blowers on to clear it it seems to get worse but i noticed hardly any air comes ot the windscreen vents but the rest work fine any ideas its getting annoying when your stuck in traffic trying to get home but if you use the air con it clears in seconds

 

Don't know if this has a pollen filter but if it does it almost certainly needs replacing.

Cheers
Mark

 

it would clear in seconds with a/c - that's one of it's key functions

the reason it works as the a/c makes the evaporator cold, so any moisture in the air condenses on it so that the air coming off it is very dry.

the downside is, that the moisture stays on the evaporator after the a/c is switched off, so it gets blown up onto the screen and mists it up again. it's a viscious circle.

if you can, dry the evaporator sometime by running the fan at full speed, with the heater on full blast pointing at the floor vents and in recirculation mode with the windows open.