Should You Use Hot or Cold Air on Rainy Days?
2 Answers
On rainy days, you should turn on the cold air in the car. Location of car air conditioning buttons: Generally, the blue button on the left side of the car represents cold air, while the red one represents warm air, and the middle one represents a moderate temperature. The white line on the left adjusts the temperature; you can set it to the middle if it gets too warm. To turn off the air conditioning without adjusting the temperature, simply turn off the middle fan. Removing window fogging: In case of window fogging, you can spray defogger to eliminate the fog on the glass. Spray a small amount of defogger on the car window and wipe it clean. This will form a thin protective film on the glass, effectively preventing moisture from condensing and forming a fog layer.
The biggest concern when driving in the rain is blurred vision due to fogged-up windows. With over 20 years of driving experience, my top tip is to use hot air for defogging. When it's raining heavily and humidity is high, the temperature difference between the inside and outside of the windshield causes condensation that blocks visibility. Blowing hot air warms the atmosphere and evaporates moisture more effectively. Although the fog might initially worsen for a few seconds, it clears completely within two to three minutes. Remember to set the AC to external circulation to draw in outside air and reduce fogging risks. If you have automatic climate control, simply press the defog button for hassle-free operation. While cold air can work on hot days, it's slower in rainy conditions and may cause chills—hot air is safer and more reliable. Clear visibility is crucial; otherwise, heavy rain can double the danger by obscuring the road. I always keep a cloth in the car for emergencies—wipe the window briefly and immediately turn on the hot air. Never gamble with safety—always prioritize it.