What is the symbol for the car defroster switch?
2 Answers
There are two symbols for the car defroster switch, one for the front windshield and one for the rear windshield. The front windshield defroster symbol is a fan-shaped pattern with three upward lines, while the rear windshield defroster symbol is a rectangular pattern with three upward lines. The car defroster switch controls the car defroster, which is used to reduce moisture, fog, and frost on the surfaces of the front and rear windshields and the outside rearview mirrors to improve visibility. When the front windshield fogs up or the interior glass surface fogs up, the outside temperature is lower than the inside temperature. Correspondingly, the temperature of the front windshield is also lower than the inside temperature, causing the water vapor inside the car to condense into small droplets on the glass surface, affecting normal driving. At this time, the defroster can be turned on.
I've been driving for over twenty years and can recognize the defroster switch symbol at a glance. The front windshield defrost button icon is a small square or rectangle with wavy arrows or curved lines, indicating airflow blowing away fog on the glass. The rear window defrost symbol is similar but includes parallel diagonal lines or dotted heating lines, representing heating elements at work. These symbols are located on the air conditioning control panel, near the fan button. When it rains or the car fogs up in winter, pressing it activates high airflow defrosting with immediate effect. I remember one heavy snow day when fog blurred my vision and nearly caused an accident. Now I've developed the habit of checking these switch positions as soon as I get in the car. The intuitive symbol design helps drivers react quickly – don't wait until the road becomes unclear to panic. Practicing these icons a few times helps memorize their appearance. Safety always comes first.
