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Lots of Condensation On Inside Windows-New Car

1409 Views 33 Replies 10 Participants Last post by  noturbonoproblem

I originally posted this thread regarding my 2023 Forte taking a long time to warm up. The reason why it bothers me is because I always seem to have excess condensation on the inside of the windows. Sometimes it is fogged up, sometimes it is almost actual drops. When it is below freezing there is sometimes ice...all on the inside windows. I live in the northwest where it rains a lot but none of my other cars have ever has this problem. I have felt around the floor for wetness but cannot find anything. The windows have never been left down so that rain got in so I cant figure out why I am seeing this. I have tried defrost only, defrost with AC on, recirculate both on and off, regular vent with AC on and off...nothing seems to make a difference.

I have a short commute (like less than a mile 90% of the time) but have taken the car of several longer drives to really heat things up and hopefully dry out, but it seems to always come back after I am back to the short commute. For example, yesterday I took it to work at 6 am and it wasn't too bad. After work at about 6pm I had to wait for the front window to defog on the inside to drive home.

I did get a couple of digital hydrometers to put one in my truck and one in the Forte. The one in the truck is reading 53% and the one in the Forte is 69% which seems excessive. I would image both should be close to the same, so for some reason there is more moisture in the Forte. I am going to make an appointment today at the dealer to have it looked at but am curious if anyone else has this problem or suggestions on where to look. So far I have checked the in cabin air filter and ac drain. Not 100% sure on the ac drain, but I think it is working. Hard to tell as it has been wet here.
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are you running the recirc alot? What are your avg daily temps?
I would run the a/c on the floor setting at high speed with a comfortable temp for the majority of your drive then turn a/c off but keep fan on high for last 5 minutes of drive to dry out the evaporator before you shut it off. Do this for a couple days and I think it might fix your issue. Double check that that passenger floor is not wet under the floor mat and make sure there is no water in the spare tire well. Do you have a garage at home? If yes leave the windows open at night for those couple days your trying to dry it out. Make sure the climate system is not in recirc mode at all.
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You could have a blocked/frozen evap drain. If the problem continues that is the most likely culprit.
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I really feel like your not using the system correct. set the temp you like then make sure your not on recirculating at all!!! Put a/c on full speed and on windshield setting, once windshield is clear switch to feet and windshield. 5 minutes before getting to location switch a/c off but fan still high and put on feet only. Do this for a few days and you should get most of the moisture out the interior.
Also, I have driven it for long drives and cleared out any moisture that could be in the car at really uncomfortable hot temps on days with no rain and it still comes back and does it. I appreciate your comments because you are trying to help, but I just dont think it is user error.
You can set to a comfortable temperature, it does not need to be hot. As long as a/c is on it should dehumidify the interior. Maybe trying letting car warmup for 5min before you leave everyday? I have had heavy moisture on a couple occasions with the right conditions but it will remedy after a couple days. The only other concern is if your a/c is actually working?
Cabin filter is not clogged is it? If the cabin filter is clear it really sounds like a/c not turning on or a water leak that could be pooling under the carpets since you said the top of carpets are dry.
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