chauf4 Posted December 20, 2007 Report Posted December 20, 2007 Hi all, This is a subject that I have had to deal with in the last couple of weeks. On the M25 near J9 I was doing around 70mph when my windscreen just disappeared behind a wall of mist ;) . Changing the heater/blowersettings made no difference and switching on the heated windscreen did nothing to help. I had to find a cloth pretty quickly just to get my vision of the road back. After searching out posts on here and a couple of other websites I have found the reasons why that happened to me. My gal has always had a small problem getting rid of moisture but never has it placed me in that kind of danger before. I read that the air-con will turn off at low temperatures and it turns out that it does indeed switch off when the outside temperature drops below 5c, but the light on the switch does not go out. Basically the moisture that had been collected by the air-con system was now being released back in to my car and the only way this was going to be cleared was by fresh air getting in to the car. The heating/blower system was clearly not providing enough fresh air to do the job so the window had to be opened. I found a few different reasons behind what can cause moisture build up in the car and so I followed all the pieces of advice and it seems to have done the trick. 1 Change the pollen filter (i bought a pattern part one which was just a little bit thinner than the ford one, as a result the air flows through it better) 2 Make sure no water is getting in where it shouldn't, ie (2a) Clear drain scuttles (2b) If rear wiper/washer jet does not work check wiper hose has not come apart under passenger side door/footwell trim (2c) Check coolant level. If this is leaking there is a small chance it could be leaking in to the heater matrix. Put some rad-weld in to the coolant system (2d) Check rubber door seals for splitting 3 Make sure the inside of all your windows are nice and clean, dirty windows mist up quicker than clean ones, apparently! :unsure: Since doing all this I have not seen any mist whatsoever and my blower system is 2 times more powerful than it was and does not sound likes it is struggling anymore. Sorry to waffle on, but if this helps anyone then thats great. ;) Cheers Quote
Steve P Posted December 21, 2007 Report Posted December 21, 2007 Agree with the radweld bit. We found that ours was using water and the windscreen was misting up. Certainly on older cars the heater matrix can fail - and you will not get a puddle of water inside the car because it will drain via the aircon drain. Radweld fixed ours for now. It's a big job to change the matrix - and it would cost more than the cars worth to have a garage fix it!! CheersSteve Quote
sainot Posted August 5, 2009 Report Posted August 5, 2009 I had the same problem on my 2002 Galaxy 1.9 TDi Ghia. Here is what fixed it for me: 1 - Change the pollen filter ( Quote
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