How to Turn on Defogging in Summer?
3 Answers
First, adjust the air direction switch to the defogging position, activate the external circulation to let fresh air blow in, and set the compressor and fan speed to the highest to speed up defogging. If the side window defogging is not fast enough, it is best to close the two central air vents to allow the airflow from the side vents to quickly disperse the fog.
When it comes to defogging in summer, I have a lot of experience during long-distance driving. Fogging on the windows is caused by the temperature difference between the inside and outside of the car or high humidity on rainy days. As soon as I notice fog, I immediately press the defog button, usually marked with a fan-shaped symbol and wavy lines. At this point, the air conditioning automatically turns on the AC for cooling and dehumidifying, with the fan speed set to maximum to blow on the front windshield, and it clears up in seconds. Remember to turn on the external air circulation on rainy days, otherwise the humidity inside the car will only get worse. Don’t forget the rear window defroster button either—it uses electric heating wires to clear fog, so don’t confuse it with the front window. Once visibility is clear, adjust the fan speed back to normal, as keeping it on high is not only uncomfortable but also wastes fuel. Once during a heavy rain, I forgot to turn on the external air circulation, and the fog kept getting worse—that was a real lesson learned.
Foggy windows in summer are a common issue, especially when getting into a car that's been baking in the sun after rain. My method is straightforward: turn the AC knob to the coldest setting, crank the fan to maximum, and direct the airflow specifically at the windshield. The key is to activate the AC compressor, which is the real core of dehumidification. When the rearview mirror is unclear, I also press the rear window defogger button with the heating symbol. Be careful not to blow air at the glass for too long, as the outer surface may fog up again if the temperature gets too low. Once the fog has mostly cleared, adjust the temperature and fan speed to a comfortable level. For those who don't want to manually adjust each time, many cars now come with an automatic defogging feature—just press AUTO and let the system determine the humidity levels.
