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Thanks, fresh, I’ll try recirc.Check whether you're recirculating air or bringing in fresh. I only use recirc when the AC is on, if I'm just running the vent fan then it needs to be on fresh air.
That’s exactly my case.Here in Houston, I am getting that crazy fogging sometimes as well since it's August.
It's not on the inside, so it's not offgassing. You pretty much have to use the wipers when it's really heavy fogging. The defrost setting of the climate control isn't going to clear the moisture on the windshield anytime soon.
Even with the AC set to vent straight out and not to the windshield the fogging is horrible. Any thoughts.
Thanks
You want air conditioned air to blow on the windshield. Your fogging issue is because of water vapor. Air conditioned air has no water vapor.
Defrost button will clear inside windshield moisture with the A/C compressor activated. Wipers will not so anything to clear the interior glass.It's not on the inside, so it's not offgassing. You pretty much have to use the wipers when it's really heavy fogging. The defrost setting of the climate control isn't going to clear the moisture on the windshield anytime soon.
Thanks Gasarski. It’s gonna be hot and humid here again tomorrow. I’ll try this. The fogging is on the outside of the windshield.You want air conditioned air to blow on the windshield. Your fogging issue is because of water vapor. Air conditioned air has no water vapor.
Fogging is on the outside of the windshield.Defrost button will clear inside windshield moisture with the A/C compressor activated. Wipers will not so anything to clear the interior glass.
How to Properly Clean your Windshield - AMMO AUTO CARE INC.Fogging is on the outside of the windshield.
Most people would use the term "fogging" for moisture condensation on the inside of the windshield. If it's on the outside, it's because the humidity is high and the windshield is cool. I assume your windshield wipers would remove it? Edit: This happens to me a lot when I park outside.Fogging is on the outside of the windshield.
Fogging is on the outside of the windshield.
Thanks. I have the hvac set to blow air from the vent, not toward the windshield. It appears that the air leaks toward the windshield on the right side.OK. Two points here.
1) If it is really humid inside the car (maybe you just came in from the rain? Breathing hard?), the humidity will build up and condense on a cooler surface in the car. Like the windows or windshield. (Google Dewpoint). Turn on the A/C, set at some reasonable setting like 73 or 74. Turn on RECIRCULATE. Now the air will recirculate over the coils, the moisture will condense on the coils and you will have "dehumidified" or dryer air. Turning on the interior dehumidifier pretty much does that plus directs the air to the windshield. In an ICEV, you used to be able to run the temp way up and still have the compressor running. I think the energy saving brains in the Tesla might cut off the compressor at higher temps.
(Note - I left the top down in a rented Mustang in Florida years ago. Drenched everyting, including fabric seat covers. Left the car running with A/C on Recirc set about 80 degrees for about 4 hours. With the top and windows closed of course. After that, the inside of the car was as dry as a skeleton's ass. Budget never knew what had happened).
2) If the fogging is on the outside of the windshield, that means you are likely blowing cold air on the windshield, cooling the glass below the dewpoint of the outside air and the water condenses on the outside. As long as the glass is cooler than the air outside, the water will reappear. Don't blow cold air on the windshield. A little warmer air helps but will take awhile to transfer the heat to the outside of the windshield. Thermodynamics and conservation of energy and all that.
And of course, if you think you have the defroster on, make sure you are using the right "button". I believe the rightmost is the "defogger" or heat coils for the rear window, and the left one is for the windshield. You might have to RTFM, my memory got up and went a long time ago.
Class dismissed.
Thanks. I have the hvac set to blow air from the vent, not toward the windshield. It appears that the air leaks toward the windshield on the right side.
Smoke/fog machine.In a time long ago and far away, I would have used a stream of cigarette smoke to trace the air flow. I'm sure there is another way today...
My windows do the same thing making it very very hard to drive at night .Even with the AC set to vent straight out and not to the windshield the fogging is horrible. Any thoughts.
Thanks