Iced Windscreen...

[Jemisa]

My H has just come in, (had a hosp appt) said when he got in the car the windscreen was iced up (INSIDE) he took some time scraping it off. He said its never happened before that he can remember. What could have caused this? all windows were shut tight.

Has it ever happened to you??

jem

[Pooka1950]

I imagine that it was just condensation that had frozen up overnight. It has happened to me more than once!

[bookbinder]

This has also happened to me when I got in the car and inadvertently breathed on to the windscreen. Result; instant frost on the inside of the screen!

[shoota]

Every time you get in when it's raining you take water in on your shoes which collects on the mats, that evaporates and collects on the screen and freezes overnight.
Dry your mats and go for a long run with the heater on and a windoe open a little.

[frugalfred]

Yes, as shoota says, and if you've got air conditioning, put it on.

[pusskin]

I had a lot of that problem when i had my VW Beetle , was murder at times.

[BRIGHT SPARK]

Make sure that all the air vents are closed to stop damp air entering the car whilst parked.

[Hopkirk]

Stop breathing

[pdq1]

Obviously you put the heater full on when entering the car. However is it better to recirculate the air within the car or allow air to be taken from outside? I always do the former as the air within the car must by definition be slighly warmer than outside air.

[Jemisa]

He's been driving for 50 years & breathing that long too but has never come accross the prob before...

jem

[bookbinder]

lol @ Hopkirk!

[Clanad]

... Even though you turn the heater and defroster on, also turn on the air conditioner since it is equipped with a dehumidifier that makes the frost go away more quickly... works just as well on a steamy inside window as well...

[sunny-dave]

Dunno why people ever turn the aircon off - it costs naff-all to run & the de-humidifier keeps the inside of the car clear of damp in the winter.

It also means you have a much better chance that it will cool properly when (if?) you need it next summer, since it is kept ticking over in the winter.

[pdq1]

Do many many British cars have air conditioning. I know they do in the States but they have much warmer weather in the Summer.

[shoota]

66.666(recurring)% of my cars have air-con.

[sunny-dave]

I haven't had a car without aircon for the last 20 years - it was something of a rarity then, but is pretty well standard (or a minimal cost option) nowadays.

[boxtops]

happens to me all the time, it takes longer to clear the inside than the outside.

[Jemisa]

He wanted to know why it happens not the remedy. We've had cold weather like this before, and the windscreen has Never frozen on the (INSIDE) before.

jem

[woofgang]

Because there was a moisture source inside the car.....damp towel, wet floor mat, damp coat etcetera. I have two dogs and in the winter there is always some moisture in the car from their bedding or my wellies

[pdq1]

It don't take much working out that if the windscreen freezes on the inside the temperature must have dropped below freezing. Just like a house which gets colder than normal it can usually be put down to bad insulation. In a car cold air came come from the doors, under the dashboard, badly fitted windows or even a faulting locking boot. As mentioned about this damp cold air freezes.