Does driving without AC save fuel?

[DiAiden]

When the car air conditioner is not using AC, it can only provide heating, not cooling, and does not consume fuel. Meaning of AC: AC is the switch for the air conditioning compressor. When using the air conditioner in summer, AC must be turned on, meaning the cooling function must be activated. However, the heating function only utilizes the heat circulation inside the car and does not require the air conditioning compressor to be engaged. Therefore, to turn on the heating, you only need to adjust the air conditioning buttons without turning on the AC switch. How AC works: Cool air is produced by pressurizing the compressor to liquefy the refrigerant, which then evaporates and absorbs a large amount of heat from the air. When the cooling function is activated, the compressor's pulley drives the compressor to work, increasing the engine's load and consuming a certain amount of fuel. On the other hand, warm air comes from the heat generated by the engine during operation: when the engine's cooling system dissipates heat from the engine, a fan directs this heat into the car to provide warm air. When the heating function is not in use, the fan stops, and the heat vent closes, allowing the dissipated heat to be released entirely into the atmosphere. Therefore, the car's heating system recycles waste heat and does not consume additional fuel.