What is the best mode to use car air conditioning in summer?

[Nate]

The best practice should be to first open the windows to allow air circulation inside the car. After the car starts moving, turn on the AC cooling function and set the air circulation to the external mode. The temperature can be adjusted to the lowest setting to speed up the temperature balance inside the car. Methods to quickly lower the car's interior temperature: 1. Sequential window opening method: First, open the same side door or lower the window completely while keeping the other side windows closed. Then, open and close the door repeatedly to expel the hot air inside. 2. Diagonal window opening method: Open all four windows or diagonally opposite windows while driving to accelerate the flow of hot air out of the car.

[DanielaDella]

As an experienced long-distance driver, my summer AC routine starts with immediately rolling down the windows for ventilation upon starting the engine, then closing them to activate the A/C switch. I prefer auto mode set around 24°C, allowing the system to automatically adjust fan speed and cooling intensity. Initially using recirculation mode for faster cooling, I switch to fresh air mode for a few minutes after 20 minutes of driving to prevent dizziness. Before parking, I turn off the A/C button in advance, leaving only the fan running for a few minutes to prevent mold growth and odors in the AC ducts. Combined with sunshade parking, this significantly reduces the initial cabin temperature, making the AC more efficient. This practice maintains cool comfort without excessive fuel consumption while extending vehicle lifespan.

[CharlieLee]

Based on my understanding of automotive systems, the automatic air conditioning mode is the optimal choice in summer. I usually set the temperature to 25°C, as it intelligently balances fan speed and compressor output to reduce energy waste. Initially, I use the recirculation mode for rapid cooling, then switch to fresh air mode periodically for ventilation. Regular inspection of the cabin air filter is essential - if clogged, it affects efficiency. I recommend replacing it every six months to ensure proper dehumidification. Also, pay attention to refrigerant levels; slow cooling may indicate a leak requiring immediate repair. This maintenance approach ensures stable AC operation while being safer and more environmentally friendly.

[VonHaven]

From a health perspective, I prioritize using the automatic air conditioning mode while driving, setting the temperature within a comfortable range such as 26°C to avoid catching colds due to excessive temperature differences. I adjust the fan speed to medium and direct the airflow to the foot vents to minimize direct exposure to the body. Initially, I use the recirculation mode to cool down quickly, but switch to fresh air mode every 15 minutes to maintain air freshness and reduce the accumulation of pollutants inside the car. Regularly cleaning the air conditioning filter prevents bacterial growth and allergies. These small habits ensure the comfort and health of my family and me.