What to Do When the Outside of the Windshield Fogs Up Before Turning on the Air Conditioning?
2 Answers
The solutions for windshield fogging before turning on the air conditioning are: 1. Open the windows. In cases of mild fogging, slightly opening both windows to allow air circulation can eliminate the temperature difference on both sides of the windshield, naturally preventing fog formation. 2. Use a defogging agent. The principle of a defogging agent is to spray a layer on the windshield, forming an effective protective film. 3. Turn on the air conditioning cold air. This can quickly eliminate fogging. Extended content: The functions of car air conditioning are: 1. Providing a comfortable environment for passengers and reducing travel fatigue. 2. Creating good working conditions for the driver, serving as an important ventilation device for ensuring safe driving.
I've been driving for over a decade and often encounter the issue of fog forming on the outside of the windshield when the air conditioning is on. This mainly happens because the cold air from the AC hits the glass, lowering its temperature too much. When the moisture in the outside air comes into contact with the cold glass, it condenses into fog. Dealing with it isn't difficult: the first instinct is to immediately turn on the windshield wipers to wipe it away—the fog clears right off. Then, adjust the AC vents to avoid blowing directly onto the windshield; instead, aim them toward the feet or the front. If fogging persists, try increasing the AC temperature slightly or switching to the external circulation mode to allow air exchange between the inside and outside of the car, reducing the temperature difference. Regularly cleaning the windshield surface also helps, as dust buildup makes fogging more likely. For safety, don’t panic while driving—handle it calmly, since impaired visibility poses significant risks.
