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Originally Posted by Amarendranath I used to do the same but i'm wondering if there is any other solution. I never really gave it a thought as nothing was coming up on the drivers side. Yesterday i could see fogging on the driver side window and passenger side windshield, which is now bugging me. |
This happens when in auto mode especially in our humid climate. In auto mode, the cold air is sent through all vents as sensed required by the climatronic. So it sends air towards windshield too according to the input it gets from various temp. sensors in different locations. When the hot and humid air outside comes in contact with that part of the windshield or any glass which is getting cooled by direct air flow towards it will cause condensation and that is the fogging that happens.
It's seen either at night time or during long journeys with the AC temp. set to very low or on very humid or rainy days. Here are a few things I do to prevent it.
If there is any slight indication of fogging, I set the flow manually to the upper vents that are facing us. Basically that over rides the auto mode and then directing the flow becomes manual. You can select the bottom vents also if you want flow towards feet but keep the windshield vent de-selected.
Do not direct any vents towards the top or sides which causes the cold air to directly hit the windshield or side glass which causes fogging. Usually passengers do this to direct the cold air flow away from them thus resulting in fogging of that glass which gets the direct hit of cold air.
Set the temp. and fan speed to what is required than having the blowers blasting on full and with AC temp. set to very low. To get cabin cooled faster in very hot climates, when you start off a journey, roll down the windows and blast the blowers in full just for a few mins to expel the hot air and then shut windows and set it to a lower speed. This cools faster.
Set the AC to the required temp. only rather than setting it to 18 or below that. Even 22 is comfortable if things are set right (even in hot climate).
Very important - In dark hours, start the AC after you guys are all inside with doors closed and windows shut only. Do not open doors or roll down windows after that when the AC is running, even for a short while. Switch off the AC before you open anything and switch it back on only after everything is shut back. Even if for a very short duration to pay tolls or whatever, observe this precaution at night time and see the difference. Try this out. Opening and closing doors/windows when the cabin is cold during dark hours and see for yourself how fast fogging happens and try it out with the precaution I just mentioned. You will see the difference yourself.
I follow these things to reduce fogging as much as possible and has worked well. |