Should the AC be turned on when using the car air conditioner in summer?

[MacCalvin]

In summer, the AC should be turned on when using the car air conditioner, as it is the cooling switch of the car air conditioner. Without pressing the AC button, the air conditioner cannot cool. Below is more information about the air conditioner: 1. When the AC button is pressed for cooling, the compressor clutch will engage, and the engine will drive the compressor to operate. At this time, the compressor can continuously compress the refrigerant and deliver it to the evaporator. 2. The car air conditioner is used to adjust and control the temperature, humidity, air cleanliness, and air flow inside the car compartment to a suitable state, providing a comfortable environment for passengers, reducing travel fatigue, creating good working conditions for the driver, and playing an important role in ensuring safe driving.

[VanAliyah]

I think turning on the AC is a must when driving in summer with the air conditioning on. Otherwise, just turning on the fan without cooling will only blow hot air, making the car unbearably hot. I've been driving for over 10 years and have encountered a few times when the AC malfunctioned and only blew air. It felt like stepping into an oven—impossible to focus on driving and prone to sweating and motion sickness. Nowadays, cars are designed intelligently; when you turn on the AC switch, the AC light automatically comes on, and the compressor works efficiently for quick and effective cooling. Occasionally lowering the temperature setting can also prevent the car from getting too cold. There is indeed a slight increase in fuel consumption, but comfort and safety are more important. Usually, I just press the AUTO button as soon as I get in the car, letting the system automatically control the airflow and temperature, which is hassle-free and effortless.

[LeMakayla]

As someone who frequently drives long distances, I highly recommend turning on the AC during summer drives. When the car is filled with scorching heat, not using the AC is simply wasting electricity—the fan's natural airflow doesn't cool at all and instead brings in hot air, making you sweat even more. My routine is to open the windows for a few minutes before starting the car to let the heat escape, then close them and activate the AC and air conditioning, setting the temperature between 24-26°C for a balance of energy efficiency and comfort. This helps protect the car's plastic components from warping due to high temperatures and is also healthier, preventing heatstroke. Don’t worry about the negligible increase in fuel consumption, especially on highways where the impact is minimal. It's more important to adjust the mirrors and seats for better air circulation.

[MariaFitz]

I've observed that turning on the car AC in summer without engaging the compressor is just self-deception. The core function of AC is cooling, and only when the compressor operates can it truly lower the temperature. I used to think turning off AC saved fuel, but tests showed that the fan blowing hot air only made the cabin stuffier, with negligible fuel savings and impaired concentration. The correct approach is to press the AC button immediately after starting the car, letting the automatic system adjust fan speed—just set the temperature and it handles the rest. For short stops, try turning off AC for ventilation, but always keep it on while driving to ensure safety.

[LeGage]

From my perspective, turning on the AC is a must when using the car's air conditioning in summer, otherwise it's completely ineffective. When the temperature inside the car soars, running the fan without cooling is like adding fuel to the fire—the hot air makes people uncomfortable. I'm used to quickly pressing the AC button as soon as I get in the car. Once the AC light comes on and the compressor starts, with medium fan speed, the car cools down in about 10 seconds. This not only enhances comfort but also prevents the air inside from becoming stale and breeding bacteria. Remember to check the cabin air filter to ensure it's not clogged, which could affect efficiency. Of course, turning off the AC before shutting down the engine during short stops can save a bit of fuel, but don't be too stingy—health comes first.

[DelLilliana]

As a daily driver, I believe turning on the AC in summer is absolutely essential. The fan can only circulate air but not cool it down—without AC, the car interior can exceed 50°C under intense sunlight, and opening windows won't help. I usually set the AC temperature slightly higher, like 26°C, to avoid excessive fuel consumption, while the compressor quickly cools the cabin to prevent dizziness. For older cars, running the AC periodically also prevents dust buildup in the system. Safe travel far outweighs saving a few drops of fuel—driving without AC in hot weather increases fatigue risks, especially when traveling with family, so extra caution is crucial.