[nickharman]

If I turn on the demist the windscreen immediately fogs up absolutely solid before slowly clearing.

It's incredibly dangerous and after a near miss I never now press demist unless parked up

Is it something to with the A/C system?

2005 93 Aero Cab

 

[nickharman]

That sounds scary. I never experienced that before.

It is! Total white out in seconds. It has to be an A/C thing.

 

[nickharman]

Does it have a sickeningly sweet aroma? If you wiped with a white paper towel, is the mist tinted pink? P.s. I think you'll fit in better calling your cab a vert. I mean, it's not a Volkswagen, right??? 😅😂

It's just plain old condensation.

 

[nickharman]

A/C is ok, no coolant leaks, I think it may be as people suggest, the cabin filter is blocked or damp.