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Hyundai Sonata Windows Fogging

12 messages, Last post on Oct 22, 2008 at 6:10 PM

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What is this discussion about? Hyundai Sonata, Sedan

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#1 of 12 Windows Fogging by thux Jan 03, 2007 (9:38 am)
I just bought a 2007 Sonata. I love it so far. However, on the way to work this morning, my windows were really, really fogged up. Even with the defrost pumping full blast, the back windows remained fogged. Is this a known problem? Thanks. Replies to this message: ray_h1 (Jan 03, 2007 12:47 pm) dadof6 (Jan 08, 2007 6:36 pm) bhmr59 (Jan 09, 2007 9:46 pm) and 1 more... ray_h1 (Jan 11, 2007 5:28 pm) and 1 more... hotrod54 (Jan 03, 2007 6:04 pm) xj220 (Jan 04, 2007 9:37 am)
#2 of 12 Re: Windows Fogging [thux] by ray_h1 Jan 03, 2007 (12:47 pm)
Replying to: thux (Jan 03, 2007 9:38 am) Which trim level Sonata? The "GLS" and "SE" trim level Sonatas have a manually controlled heating/air conditioning system. In those, pressing the button for the AC compressor will clear the window fogging, though you might have to adjust the heat control knob to a warmer setting to keep the chill off. In the "Limited"'s trim level, cycling the AC compressor occurs automatically since those models have automatic climate control. It's possible your in-glass defroster in the rear glass is defective or isn't connected properly to its switch (Hey, some happy-merry worker who got especially happy-merry the previous Sunday night on some 100 proof Andong soju might've missed a step when your car came sailing down the production line... ). It's also possible you pressed the windshield defroster switch ("curved" top and bottom shaped icon which delivers warmed air to the windshield) instead of the rear window defroster switch ("straight" top and bottom shaped icon which acivates the in-glass defroster grid in the rear glass). Replies to this message: dadof6 (Jan 08, 2007 6:36 pm) bhmr59 (Jan 09, 2007 9:46 pm) dadof6 (Jan 10, 2007 4:37 am) ray_h1 (Jan 11, 2007 5:28 pm) bhmr59 (Jan 11, 2007 6:26 pm)
#3 of 12 Re: Windows Fogging [thux] by hotrod54 Jan 03, 2007 (6:04 pm)
Replying to: thux (Jan 03, 2007 9:38 am) it's also possible you are have the vent system set to recirculate....never never never never use recirculate with heat.
#4 of 12 Re: Windows Fogging [thux] by xj220 Jan 04, 2007 (9:37 am)
Replying to: thux (Jan 03, 2007 9:38 am) When I test drove it, it fogged up really fast. I've never seen windows fog up that quickly before and it wasn't even that cold out. I don't know what the salesperson did but I'm sure it had to do with the air/heat circulation. It never happend after that.
#5 of 12 Re: Windows Fogging [ray_h1] by dadof6 Jan 08, 2007 (6:36 pm)
Replying to: ray_h1 (Jan 03, 2007 12:47 pm) The a/c compressor runs in both defroster modes on my '07 GLS. FYI Replies to this message: bhmr59 (Jan 09, 2007 9:46 pm) dadof6 (Jan 10, 2007 4:37 am) ray_h1 (Jan 11, 2007 5:28 pm) bhmr59 (Jan 11, 2007 6:26 pm)
#6 of 12 Re: Windows Fogging [dadof6] by bhmr59 Jan 09, 2007 (9:46 pm)
Replying to: dadof6 (Jan 08, 2007 6:36 pm) What do yo mean by "both defroster modes?" Replies to this message: dadof6 (Jan 10, 2007 4:37 am)
#7 of 12 Re: Windows Fogging [bhmr59] by dadof6 Jan 10, 2007 (4:37 am)
Replying to: bhmr59 (Jan 09, 2007 9:46 pm) 1st defroster mode-the feet/window setting. 2nd is the full window setting on the heater control dial. Does this help?
#8 of 12 Re: Windows Fogging [dadof6] by ray_h1 Jan 11, 2007 (5:28 pm)
Replying to: dadof6 (Jan 08, 2007 6:36 pm) )) "The a/c compressor runs in both defroster modes on my '07 GLS. FYI" (( Then for whatever reason, excessively humid air is being processed. If you're operating the system with fresh air entry, reset the controls to "recirculate" mode. If you're already doing that, then it's time for a trip to the dealer to find and correct an extraneous air or (shudder!) coolant leak into the heater core casing. Check the drain hose from the heater core casing underneath the car - if it's plugged, condensation won't drain and you'll also end up with fogged windows regardless how you manipulate the HVAC controls. FYI Replies to this message: bhmr59 (Jan 11, 2007 6:26 pm)
#9 of 12 Re: Windows Fogging [ray_h1] by bhmr59 Jan 11, 2007 (6:26 pm)
Replying to: ray_h1 (Jan 11, 2007 5:28 pm) One other thought. I really need to climb in back and clean the inside of the rear window. "Normally" it's OK. But on a damp or rainy day it appears quite fogged unless/until I turn on the rear window defroster. A good "windex" of all interior glass may do the trick--or not. Even though your car is new, it may have "stuff" (a film) on the glass.
#10 of 12 Fog & dew by dave868 Oct 18, 2008 (7:00 pm)
I really dont understand... I have 3 cars in my driveway... and when I go out every morning the heaviest fog is on my Sonata. About half the time the other 2 cars windows are perfectly clear... but the Sonata's are always wet and foggy. How can this be? Replies to this message: craigbrooks (Oct 21, 2008 2:41 pm) dave868 (Oct 22, 2008 6:10 pm)

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