Should the AC be turned on in the car during summer?

[DeCooper]

The AC button controls the air conditioning compressor. In summer, when using the air conditioning, it is essential to turn on the AC button to activate the cold air. Here are the details: 1. The AC button must be pressed for cooling. Cold air is produced by compressing the refrigerant into a liquid and then allowing it to evaporate, absorbing a significant amount of heat from the air. When the cold air is on, the compressor pulley drives the compressor, increasing the engine load and consuming a certain amount of fuel. 2. For warm air, simply adjust the air conditioning controls without turning on the AC switch. Warm air comes from the heat generated by the engine. When the engine's cooling system dissipates heat from the engine, a fan directs this heat into the car to produce warm air. When warm air is not in use, the fan stops, and the warm air vent closes, allowing the heat to dissipate into the atmosphere. Therefore, car warm air is a form of waste heat recycling and does not consume additional fuel.