What Causes Fogging on the Outside of the Windshield When Using the Air Conditioner on Rainy Days?
2 Answers
The reason for fogging on the outside of the windshield when using the air conditioner on rainy days is the significant temperature difference between the warmer interior and the cooler exterior, which leads to condensation. Drivers must promptly clear the fog to prevent potential traffic accidents. Below is a detailed introduction to driving: 1. Overview: Driving is one of the essential skills for modern individuals. Mastering driving-a-motor-vehicle requires meeting age and physical condition requirements, as well as completing training and passing exams on road traffic safety laws, mechanical knowledge, and safe driving practices. 2. Additional Information: Driving permits are issued through the licensing process. This indicates that obtaining a driver's license is a formal procedure that must be authorized by designated authorities.
I've encountered the issue of fogging on the outside of the windshield when using the AC on rainy days several times. Once when driving a friend to the airport during heavy rain, the outside of the rear windshield fogged up after turning on the AC, almost obscuring the rearview mirror. The main reason is the humid and moist outside air. The cold AC air hitting the windshield lowers its surface temperature, much like condensation forming on items taken out of a fridge. When external moisture meets the cold glass, it condenses into tiny water droplets. At the time, I found that slightly increasing the AC temperature or switching to a mode that doesn't blow directly onto the glass helped a lot. If visibility is impaired while driving, it's crucial to pull over safely—safety first. Don't panic in such situations; most cars have a defogging feature that can quickly resolve the issue.
