Does Turning on the Air Conditioning Increase Engine Heat?

[MarcusMarie]

Turning on the air conditioning does increase engine heat, as the energy for the car's air conditioning is entirely provided by the engine. Radiator Internal Blockage: High temperatures are inherently unfavorable for engine cooling. When the air conditioning is turned on, the engine's load increases due to the need to drive the air conditioning compressor, leading to a rise in temperature. The coolant circulates within the engine, absorbing heat, and then moves to the radiator for cooling. Over time, the radiator may become partially blocked due to the accumulation of scale and impurities, making it difficult for the high-temperature coolant to dissipate heat effectively. Insufficient Electric Fan Speed: The radiator and condenser require sufficient airflow to achieve adequate cooling. Therefore, the operation of the electric cooling fan is crucial for the engine's thermal management during summer. In urban driving conditions with frequent congestion and low speeds, the electric fan needs to operate at high speed to draw air into the intake grille, ensuring that the condenser and radiator function optimally.