rich-racing.co.
Member
my windscreen really mists up when I first put the blower on.
it does clear, and it's better if you put it on cold.
this normal?
it does clear, and it's better if you put it on cold.
this normal?
mist out of the heater?
- Thread starter rich-racing.co.
- Start date
television
Hardcore MB Enthusiast
Yes this is correct, try and not sit to near the screen to keep the heat off you condensing onto the glass, if you can stop breathing until the car warms up,so much the better.
A clean screen inside stay much clearer than a dirty one
OP
OP
rich-racing.co.
Member
Yes this is correct, try and not sit to near the screen to keep the heat off you condensing onto the glass, if you can stop breathing until the car warms up,so much the better.
as my other post - as it takes 15 mins to warm up, probably not a good idea...
A clean screen inside stay much clearer than a dirty one
screen's pretty clean.
the screen can be a little bit condensated (did I just make a word up?) before you put the demist on, but as soon as you put the blower on, it instantly gets much worse....
television
Hardcore MB Enthusiast
Thats because the cold air being sucked in is denser that the air in the car
if you turn the air con to min that should dry it and make it demist faster
OP
OP
rich-racing.co.
Member
sounds right - was just concerned there might have been a problem with the aircon - thanks for the help.
Bazzle
Active Member
- Joined
- May 27, 2005
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- 445
- Location
- Melbourne, Australia
- Car
- SLK230 1998 auto, 2006 W169 A200 Sport
Also check the drain tubes are clear.
Bazzle
Bazzle
fredfloggle
Banned
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- Aug 23, 2006
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- 1,437
Try something , let the coolant warm up without switching on the fan then start the fan up , if you get condensation , it points that water is being held in the heater box .
The reason why you get condensation is that because the temperature of the screen is lower than the dew point of the circulating air - since the screen and ambient are going to be pretty close if the car is kept outside then there must be (obviously) water vapour carried in the air from the heater plenum that is in excess of the ambient conditions.
The real test is to allow the screen to chill , and the heater plenum to wamr up then see what happens .
The reason why you get condensation is that because the temperature of the screen is lower than the dew point of the circulating air - since the screen and ambient are going to be pretty close if the car is kept outside then there must be (obviously) water vapour carried in the air from the heater plenum that is in excess of the ambient conditions.
The real test is to allow the screen to chill , and the heater plenum to wamr up then see what happens .
