I have recently taken possession of a 2008 QP being my 1st Maserati ownership. I'm loving the experience so far. But on these cold winter mornings as I scrape the ice from the exterior windows, I notice that the interior rear screen is also icing up? The demist button also is poor to respond to demisting on the rear inside. No other windows are affected. Front screen and side windows are OK on the inside. Is this common or do I have a fault with seals or rubbers and/or the electronic demist? Any shared experiences would be useful to understand. Even better would be any suggested solutions. Recommendation would be greatly appreciated?
Rear screen freezing up on the inside - is this normal?
- Thread starter adrianr
- Start date
Jkulin
Junior Member
- Messages
- 983
spkennyuk
Member
- Messages
- 5,963
Try one of these. you could probably use a velcro strap to hold it in place behind the rear head rest or just move it when you are using the car.
Mine has been in place a couple of days now and seems to be improving the situation. My car was misting up on the front screen with no signs of water ingress.
http://www.amazon.co.uk/gp/aw/d/B00...humidifier&dpPl=1&dpID=51WKf5uWAoL&ref=plSrch
They were on offer the other day for £7.91 so its worth doing a search on amazon as they sometimes have twin packs for around the £16 mark or the single packs on offer.
Mine has been in place a couple of days now and seems to be improving the situation. My car was misting up on the front screen with no signs of water ingress.
http://www.amazon.co.uk/gp/aw/d/B00...humidifier&dpPl=1&dpID=51WKf5uWAoL&ref=plSrch
They were on offer the other day for £7.91 so its worth doing a search on amazon as they sometimes have twin packs for around the £16 mark or the single packs on offer.
CatmanV2
Member
- Messages
- 48,796
I've had no misting since Friday, but it's not really been cold enough that I would expect it.
C
Just to provide any interested parties with an update. Mine has been in place for several weeks now and the weather has been mixed; but certainly a smattering of plenty of cold icy days. Basically, I have no idea if this product is actually doing anything, but in all honesty it does seem to be improving the situation. My car was misting up quite badly on the inside of the rear screen with no signs of water ingress, and I think it is much better now this bag is present?
CatmanV2
Member
- Messages
- 48,796
Things seemed better on mine as well, but no indication that the bags were actually doing anything.
C
Zep
Moderator
- Messages
- 9,285
Desiccant dehumidifiers are mightily effective, I have a rotary one which will recover over a gallon of water in 24 hours, from the air. They are used for drying houses after floods. You have to be careful though as it can reduce humidity to very low levels, drying out toilet bowls and making tiles fall off walls.
spkennyuk
Member
- Messages
- 5,963
Mines been in for a few weeks now. It sits on the dash top when the car is parked up. My front screen would mist up virtually every time i started the car over the winter. I have noticed the improvement with the bag in place. I have also noticed that if i move the bag before i start the car then it still mists up. If i leave the bag in place until i have started the car then the screen stays clear. Im confident it works based on the above.
Zep
Moderator
- Messages
- 9,285
It takes only a small amount of liquid to make a lot of vapour. 15 grams of water will raise the relative humidity of 1 cubic metre of air from 0 to 55% humidity at 30 degrees C. If that air then cools to 15 degrees 5 grams of that water will deposit itself all over your windows. You would need to weight your little bag (of desiccant) before and after to see how much you have absorbed - but you probably have better things to do 
I suspect the reason the screen mists on start up is that you have some water sitting in the air con drip tray or scuttle. The presence of water raises the humidity of the trapped air, making it mist when then fan starts. Might be worth looking into....
I suspect the reason the screen mists on start up is that you have some water sitting in the air con drip tray or scuttle. The presence of water raises the humidity of the trapped air, making it mist when then fan starts. Might be worth looking into....
spkennyuk
Member
- Messages
- 5,963
It takes only a small amount of liquid to make a lot of vapour. 15 grams of water will raise the relative humidity of 1 cubic metre of air from 0 to 55% humidity at 30 degrees C. If that air then cools to 15 degrees 5 grams of that water will deposit itself all over your windows. You would need to weight your little bag (of desiccant) before and after to see how much you have absorbed - but you probably have better things to do
I suspect the reason the screen mists on start up is that you have some water sitting in the air con drip tray or scuttle. The presence of water raises the humidity of the trapped air, making it mist when then fan starts. Might be worth looking into....
Makes sense it could be in the scuttle or aircon drip tray. My car lives outside so is more prone to trapping moisture than a garaged car.