Does idling with the AC on damage the car?
2 Answers
Idling with the AC on does not damage the car; it only causes normal wear and tear. Idling is a working condition where the engine runs without any load, overcoming only the internal friction of its components without delivering any external power output. It maintains the engine at a stable, low speed, which can be adjusted by modifying the throttle opening or the idle fuel supply. The functions of the AC are: 1. To regulate and control the temperature, humidity, air cleanliness, and airflow inside the car cabin to an optimal state; 2. To provide a comfortable environment for passengers, reduce travel fatigue, and create favorable working conditions for the driver, serving as a crucial ventilation device for safe driving.
As a long-time expert focusing on automotive powertrain systems, I must say idling with the air conditioning on is indeed not engine-friendly. When a car is idling, the engine operates at very low RPM with poor combustion efficiency. The additional power demand from the air conditioning compressor increases engine load, making it more prone to carbon buildup – like struggling on an inefficient treadmill. Excessive carbon deposits can lead to increased fuel consumption, engine vibration, or even malfunctions. While occasionally running for 10-15 minutes may be acceptable, prolonged idling (over half an hour) poses significant risks, especially for older models or in high-temperature environments where battery drain accelerates. Ultimately, this seemingly convenient habit carries hidden dangers. Proper parking or shutting off the engine after moderate driving is wiser, as it extends engine life and saves maintenance costs.
