I recently had to swap out my 2000 Golf's A/C compressor as the bearing was finished. So to do this I had to crack open the the lines and let the gas out in order to do the swap. I still haven't gotten around to getting the system filled back up, but lately when I have been driving around the windows begin to fog up after only driving the car for 5 mins. I turn the fan on high and it does barely anything. Does the A/C system on this car also take care of defogging the windows when not cooling the interior during the summer?
Golf: Windows fogging up after 5 mins of driving..
- Thread starter Mr_Accord
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Yes.
JHZR2
Staff member
Wow, Ill bet that is highly illegal in Canada as it is in the USA.
AC always dehumidifies the air, that is one of its main functions.
AC always dehumidifies the air, that is one of its main functions.
are you sure you don't have a heater core leaking....a leaking core will fog up the windows quickly.
Originally Posted By: Fleetmon
are you sure you don't have a heater core leaking....a leaking core will fog up the windows quickly.
+1
are you sure you don't have a heater core leaking....a leaking core will fog up the windows quickly.
+1
Originally Posted By: JHZR2
Wow, Ill bet that is highly illegal in Canada as it is in the USA.
AC always dehumidifies the air, that is one of its main functions.
Both of these.
Not cool. Why didn't you have it evacuated properly?
Wow, Ill bet that is highly illegal in Canada as it is in the USA.
AC always dehumidifies the air, that is one of its main functions.
Both of these.
Not cool. Why didn't you have it evacuated properly?
check the rear tail light seals, they often fail leaking water into the spare tire well, the water then fogs up your car.
running the AC compressor helps, but it can't remove the huge volume of water that gets into the vehicle after every rain exposure
both my 2004 and 1998 had this problem, once fixed the "london fog" in my car went away
running the AC compressor helps, but it can't remove the huge volume of water that gets into the vehicle after every rain exposure
both my 2004 and 1998 had this problem, once fixed the "london fog" in my car went away
This is one of the bigger reasons why my broken a/c stinks. If I get caught in a rain storm, things fog up real quick. Other than that, I don't have an issue.
Originally Posted By: Kuato
Dirty windows can contribute to fogging as well.
+1
As well as recirc ventilation.
Dirty windows can contribute to fogging as well.
+1
As well as recirc ventilation.
Originally Posted By: Mr_Accord
lately when I have been driving around the windows begin to fog up after only driving the car for 5 mins. I turn the fan on high and it does barely anything.
Turn the HEATER on. This will raise the temperature of the vent air such that it will evaporate moisture off the windows instead of depositing it on. That's what us older-car drivers have been doing since in-dash ducting became common but A/C was still rare.
The heat system is not as efficient as A/C-dehumidifying when the engine is cold, but it does work within a few minutes, more in very cold weather.
Also make sure you haven't got the vent system set to RECIRCULATE. The typical, modern, no-language icon for that shows the profile of a car with a swirly arrow inside of it. If you've got the system set to RECIRC, the windows will fog up really quick.
Originally Posted By: Mr_Accord
Does the A/C system on this car also take care of defogging the windows when not cooling the interior during the summer?
Yes. I was told that this has been a federal law for some years now (not sure if that's true). But the same basic function can be obtained with heat, and was for many years before automakers started using the A/C as a dehumidifier.
lately when I have been driving around the windows begin to fog up after only driving the car for 5 mins. I turn the fan on high and it does barely anything.
Turn the HEATER on. This will raise the temperature of the vent air such that it will evaporate moisture off the windows instead of depositing it on. That's what us older-car drivers have been doing since in-dash ducting became common but A/C was still rare.
The heat system is not as efficient as A/C-dehumidifying when the engine is cold, but it does work within a few minutes, more in very cold weather.
Also make sure you haven't got the vent system set to RECIRCULATE. The typical, modern, no-language icon for that shows the profile of a car with a swirly arrow inside of it. If you've got the system set to RECIRC, the windows will fog up really quick.
Originally Posted By: Mr_Accord
Does the A/C system on this car also take care of defogging the windows when not cooling the interior during the summer?
Yes. I was told that this has been a federal law for some years now (not sure if that's true). But the same basic function can be obtained with heat, and was for many years before automakers started using the A/C as a dehumidifier.
Originally Posted By: RD400
Also check that your vents are receiving outside air and are not set to recirculate in-cabin air.
That's an important point. I'm not sure how the Golf does it, but it's possible that some vehicles might go to recirculate mode in defrost to lessen the amount of dehumidification that has to occur thanks to the AC. If the AC compressor isn't working, well, the thought process behind such an engineering decision would go down the toilet.
Also check that your vents are receiving outside air and are not set to recirculate in-cabin air.
That's an important point. I'm not sure how the Golf does it, but it's possible that some vehicles might go to recirculate mode in defrost to lessen the amount of dehumidification that has to occur thanks to the AC. If the AC compressor isn't working, well, the thought process behind such an engineering decision would go down the toilet.
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