Does Using the Heater in Winter Consume Fuel?

[OJourney]

Using the heater in winter does not consume fuel. The 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's interior, creating warm air. When the heater is not in use, the fan stops, and the heat vents close, allowing the dissipated heat to escape completely into the atmosphere. Therefore, the car's heater recycles waste heat and does not consume fuel. The AC button controls the air conditioning compressor. In summer, when using the air conditioner, you must press the AC button to activate the cold air. The heater simply utilizes the car's internal heat circulation and does not require the air conditioning compressor to be turned on. Thus, using the heater only involves adjusting the air conditioning controls without activating the AC switch.