How to Turn on the Car Air Conditioning on Rainy Days?

[MacClaire]

On rainy days, the method to turn on the car air conditioning is as follows: it is recommended to turn on the cold air, keep the air conditioning in ECON mode, set the temperature to 21-22 degrees Celsius, and direct the air vents downward only. To prevent fogging on the car windows on rainy days, you can turn on the air conditioning to blow cold air. This helps lower the interior temperature, reducing the temperature difference between the inside and outside of the windshield, thereby preventing fogging that could impair the driver's visibility and ensuring driving safety. On rainy days, do not turn off the air conditioning when parking. If it's automatic air conditioning, it will automatically operate in the above mode the next time you start the car. This ensures a comfortable temperature inside the car and keeps the air fresh. Moreover, since the compressor is not running, it has minimal impact on fuel consumption and power. On rainy days, press the defogging button based on the above mode. At this time, ECON will not be displayed, and you need to press the ECON button again to make it appear. If the rain or fog is heavy or there are many people in the car, and you notice that the fog on the windows cannot be quickly eliminated, you should immediately increase the temperature setting of the air conditioning or increase the airflow to quickly remove the fog from the windows.

[MadelineLynn]

When I first got my driver's license, I always got nervous when the windows fogged up on rainy days. Later, I learned: press the A/C button immediately after starting the car, then switch to the defogging mode—the icon looks like a wavy glass. Set the fan speed to medium or high, turn on the recirculation function to let dry air quickly dehumidify the glass, and the fog will dissipate soon. Don’t rush to drive; wait until your vision is completely clear before moving to avoid rear-end collision risks. On rainy days with high humidity, I also make it a habit to close the windows to prevent moisture from entering. Cleaning the AC filter every quarter is also important to avoid mold and bad odors, making driving more comfortable and worry-free. I always keep a defogging cloth in the car for emergencies. These small tips make rainy-day driving much safer.

[VanElliott]

When picking up and dropping off kids at school in the rain, I take a practical approach to defogging the car. First, start the engine and press the A/C button to turn on the air conditioning. Select the windshield defrost mode and adjust the fan speed to a comfortable level. Turn on recirculation to lock in the air, reduce humidity, and speed up defogging. Once the fog clears, lower the fan speed to save energy. Don’t forget to check that the wipers are working properly to maintain visibility. As a parent, safety comes first—I only drive when the windows are completely clear. Regular maintenance of the AC system helps prevent odors, and washing the car after rainy days prevents corrosion—a habit I’ve kept for years.

[StEmilio]

I have some knowledge about cars. The key to using air conditioning on rainy days lies in the dehumidification principle: the AC absorbs moisture when cooling, condensing it into water droplets that are then discharged. In terms of operation, quickly turn on the A/C switch after starting the vehicle and select the front windshield defroster vent. A moderate fan speed is sufficient, and using the recirculation mode can speed up the process. It is recommended to regularly replace the air conditioning filters to prevent bacterial growth from affecting defogging efficiency. Setting the temperature around 22 degrees is appropriate, avoiding excessively low temperatures to save fuel. Once visibility is restored, switch back to normal mode for efficiency and environmental friendliness.

[Nicole]

From a cost-saving perspective, operating the air conditioning efficiently on rainy days is key. After starting the car, immediately press the A/C button, switch to windshield defogging mode, and set the fan speed slightly higher but not to maximum. Briefly activate recirculation mode to trap dry air, then switch to fresh air mode after defogging. While this slightly increases fuel consumption, safety takes priority. After clearing the fog, reduce fan speed to medium to lower energy usage. Turn off the A/C one minute before parking to blow away residual moisture and prevent mold growth. For short trips in rain, not using AC is more wasteful - waiting until visibility clears before driving is more economical.

[ClaireMarie]

Having driven for decades, turning on the AC on rainy days has become second nature. Start the engine, press the A/C button, switch to windshield defrost mode, and set the fan speed to medium. Initially use recirculation mode to speed up dehumidification, then switch to fresh air mode once the fog clears. Set the temperature no lower than 20°C to prevent catching a cold. The golden rule: never move the car with impaired visibility—safety first. Check the AC filter every six months to prevent odors, and after rainy days, open windows to ventilate and maintain dryness. These small tips remain practical over time.