What is the Defogger Switch Symbol?
2 Answers
The defogger switch symbol features a front windshield with three upward-waving lines. Methods for defogging car windows include: 1. Turn on the vehicle's air conditioning system to blow cold air onto the foggy front windshield; 2. Mix detergent with water and apply it to the outside of the car window using a cotton pad or a clean, soft cloth; 3. Open the sunroof or window to allow air convection inside the vehicle; 4. Install a window heating defogging function. Reasons for car window fogging include: 1. The car window temperature is below the dew point; 2. There is a significant temperature difference between the inside and outside of the vehicle. Functions of car windows: 1. Provide shelter from wind and rain, and reduce noise; 2. Decrease wind resistance and guide airflow; 3. Protect the safety of passengers inside the vehicle.
I've driven many types of cars and am quite familiar with this defogger switch symbol. It's usually located on the dashboard or near the steering wheel, and pressing it blows hot air to defog the windshield. The front defogger symbol is shaped like a fan, with an upward or forward airflow icon representing air directed at the front window. The rear window defogger has a rectangular or square symbol with wavy lines or arrows, indicating heating for defogging. Some cars use different colors to distinguish them, with blue indicating cold air defogging. Be careful not to confuse it when searching, as it might resemble the air conditioning switch. Accidentally turning on the air conditioning can actually make the fog worse. I usually check it regularly to ensure the button isn't clogged with dust, especially after rain. Turning it on for a few seconds clears the fog, saving time from wiping the windshield. Poor visibility in rainy weather is dangerous, so using it early greatly enhances driving safety.
