08-25-2019, 11:41 AM
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#1
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Join Date: Sep 2016
Location: Charlotte, NC
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Okay what is the secret to the front defogger?
Having two other cars that have automatic climate control, I never had an issue with the front windshield fogging up but now it seems to be hit or miss, I keep having to mess with the climate controls to get it to not fog up or collect "condensation"
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08-25-2019, 11:48 AM
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#2
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Join Date: Aug 2018
Location: N California (really, 4 hours N of SF)
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IMO it's all about the recirc setting. But where I live I don't have the humidity you get, thank god!
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08-25-2019, 11:48 AM
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#3
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Senior Member
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Join Date: Aug 2018
Location: Ohio
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If your AC is working fine and air circulation is good (no clogged cabin filter?), then possibly moisture somewhere in the ductwork or in the vehicle? I've had wet-enough carpet in another vehicle, and until it dried out, the AC had a tough time removing all the moisture, especially with high ambient humidity. Ended up condensing on the cool windshield for awhile.
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08-25-2019, 11:53 AM
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#4
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Join Date: Sep 2016
Location: Charlotte, NC
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truck only has 6,000 miles. AC works fine. Recirc is on when using the defogger
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08-25-2019, 12:42 PM
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#5
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Join Date: Feb 2018
Location: Castle Rock, CO
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Quote:
Originally Posted by tjnptel1
truck only has 6,000 miles. AC works fine. Recirc is on when using the defogger
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I thought in front defogger mode, the AC only works in non-recirc? I dont remember 100% as I haven't used it in a while, but I know my camry doesnt allow recirc with defog. When I do use it in winter it does take a long time for the fog to clear up. Maybe 5-6 minutes till it actually changes the windshield temp enough to clear the fog.
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08-25-2019, 12:53 PM
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#6
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Join Date: Nov 2012
Location: Central Oregon
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Real Name: Jim
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My 2012 SR5 defaults to outside air when the Defog is on. Does yours not do that?
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08-25-2019, 12:55 PM
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#7
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jdm-v35 is correct, it automatically shuts off recirc and turns on ac, doesn't appear you can override it. The manual says "to defrost the windshield and side windows early, increase the air flow and temperature." I guess at some point in high humidity it will take some time to clear it.
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1973 Datsun 240z (traded in for ---->) 1981 Toyota 4x4 Deluxe LB (avatar) stolen while sitting with For Sale sign on it / 1987 Chevrolet Suburban 4x4, workhorse - sold / 1984 Buick Grand National - Totaled, rear-ended / 1986 Buick Grand National - Sold then restified, lives in SF now / 1994 Toyota Camry - 240k - Taken to Austin Tx by son, traded in on VW GTI sport / 2001 Ford Excursion 7.3 212k - still pulling Arctic Fox Trailer - This is the shtf vehicle / 2018 Toyota 4runner TRD Pro Cavalry Blue
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08-25-2019, 01:06 PM
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#8
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Join Date: Feb 2013
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my experience is if you have recirc on you can get fogging in many conditions.
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08-25-2019, 01:20 PM
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#9
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Join Date: Sep 2016
Location: Charlotte, NC
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you guys are most likely right and i am wrong, i will have to check again. Even with recirc on or off (whatever the car defaults to) I still have a hard time getting it right. Damn NC humidity.
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08-25-2019, 02:32 PM
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#10
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Are you blowing cold air on it or hot?
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08-25-2019, 03:35 PM
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#11
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Turn the heat on as high as it will go with the A/C on.
Quickest way to de-fog.
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08-25-2019, 03:37 PM
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#12
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I have had to put the front defroster on and turn the heat up to high to dry it out while driving. This issue was it wasnt hot outside so it was warm until I could put the ac back on.
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08-25-2019, 11:41 PM
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#13
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I have to turn on the defrost which turns off the re-circulation. turn the fan on to high speed and mess with the temp control (hot to cold) until it clears. once its clear its not too hard to keep it clear as long as you keep it switched to fresh all. Atlanta weather stinks too.
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08-25-2019, 11:47 PM
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#14
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Quote:
Originally Posted by tjnptel1
you guys are most likely right and i am wrong, i will have to check again. Even with recirc on or off (whatever the car defaults to) I still have a hard time getting it right. Damn NC humidity.
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AH your in NC too! Ok, formula is:
Fan all the way up and on the hottest setting. Fog will go away after a min or two.
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08-25-2019, 11:52 PM
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#15
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Location: Bay Area, CA
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From the 2018 owner’s manual:
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