How to Use Defrost and Defog Functions?
4 Answers
Using the air conditioning system to defog is the most common method. Here are some related introductions about defogging: 1. Reasons for fogging inside the car: The main reason for fogging inside the car is the temperature difference. When the temperature inside the car is higher than outside, the windows are prone to fogging. Another reason is the high humidity inside the car. The warm breath exhaled by passengers inside the car condenses when it meets the cold glass, leading to the formation of fog on the windows. 2. Best way to handle fogging inside the car: The quickest and most effective method is to turn on the air conditioning cold air. By activating the air conditioning cooling function along with the external circulation, the fog on the glass should disappear in less than a minute. During autumn or winter, use the air conditioning's warm air to blow on the windshield.
I discovered the essential tips for defogging car windows right after I started driving. After starting the vehicle, press the button with the windshield symbol to activate the defogging function, and adjust the air direction to blow at maximum speed toward the front windshield. If the fog is heavy, turning on the air conditioner with cold air for a few minutes can clear it; if there's heavy frost, using hot air works better. Don’t forget to switch to the external circulation mode, which introduces dry air to reduce humidity buildup. This is especially crucial for safety—if fog suddenly obstructs your view on the highway, immediately turn on the hazard lights and pull over before handling it. I also regularly apply anti-fog spray on the inner side of the windshield to minimize fogging, and in summer, I leave the windows slightly open when parked to allow ventilation.
The principle of defrosting and defogging is to remove moisture from the windshield through air conditioning airflow. The operation is simple: press the windshield-shaped icon button on the center console, start the fan, and adjust the direction regulator to the windshield position. It is recommended to use the external circulation mode, as it can quickly introduce outside air and achieve better humidity balance. From a technical perspective, cold air is suitable for quick defogging, while warm air is ideal for winter defrosting. Simultaneously monitor the humidity inside the car to avoid repeated fogging due to excessive temperature differences. After trying various modes, I found that immediate action after startup saves fuel and is more efficient.
Dealing with fogging in the car is actually not difficult. When I notice fog or frost on the windshield, I usually just press the defrost button and then turn the fan knob to increase airflow toward the glass. Maintaining proper ventilation inside the car and setting the temperature at a moderate level helps naturally eliminate excess moisture. During my early days of driving, I often overlooked this function, which posed significant safety risks. Later, I developed a habit of checking the system every day before driving to ensure it operates normally.
