Does turning on the heater in the car consume fuel?

1 Answers
DiMiranda
07/23/25 8:26pm
Turning on the heater in the car 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, the dissipated heat is blown into the car through the fan, forming warm air. When the heater is not in use, the fan stops, and the heat vent closes, causing the dissipated heat to be completely released into the atmosphere. Therefore, the car's heater is a form of waste heat recycling and does not consume fuel. The AC button controls the air conditioning compressor. In summer, when using air conditioning, the AC button must be pressed to turn on the cold air. The heater simply utilizes the car's internal heat cycle and does not require the air conditioning compressor to be activated. Thus, turning on the heater only requires adjusting the air conditioning settings without pressing the AC button.
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