What is the difference between front windshield defogging and rear windshield defogging?

[Kendall]

The differences between front windshield defogging and rear windshield defogging: 1. Different defogging methods: Front windshield defogging is achieved by blowing air, and the compressor will activate when front windshield defogging is turned on; Rear windshield defogging uses heating wires for defogging. 2. Different symbols: The defogging symbol for the front windshield is fan-shaped with airflow markings inside; The defogging symbol for the rear windshield is square with airflow markings inside. Windshield fogging occurs due to a significant temperature difference between the inside and outside of the vehicle. When the outside temperature is lower than the inside temperature, the air inside the car cabin cools and forms condensation on the inner side of the windshield; When the inside temperature is lower than the outside temperature, water vapor in the atmosphere condenses on the outer side of the windshield.