Does idling with the AC on damage the car?

[ValentinaRose]

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.

[Phoebe]

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.

[Sandra]

As an ordinary car owner with over a decade of driving experience, I've personally experienced the troubles this brings. In summer, while waiting in the car with the AC on for cool air, it's indeed comfortable, but the cost is significant: fuel consumption spikes, adding hundreds to monthly fuel expenses, not to mention the time the engine warning light came on—the mechanic said it was due to carbon buildup from idling. Later, I reduced this practice, opting instead to wait under shade or turn off the engine and open windows for ventilation, and noticed much better car condition. In fact, running the car engine with AC on at idle is like overworking it—exerting little but exhausting greatly, especially as the AC operation adds extra strain, potentially damaging components over time. However, using it briefly for a few minutes in emergencies is fine; the key is not to make it a habit. After all, maintaining a car is like maintaining a home—a little extra care never hurts.

[OAmelia]

From both economic and environmental perspectives, idling with the air conditioning on is purely a waste of resources. The engine consumes more fuel at low speeds, and turning on the air conditioning adds to the energy consumption, emitting large amounts of exhaust that pollutes the air. A simple calculation: running for an hour uses several more liters of fuel than normal driving, and the cost over time can be shocking. Environmentally, idling emits more pollutants than driving, neither low-carbon nor economical. I recommend using this method less and opting for fans or parking in shaded areas instead, which protects your car and saves money. Remember, sensible driving habits are key—don’t lose big by being penny-wise and pound-foolish, harming the planet and draining your wallet.

[Nigel]

As a professional frequently dealing with vehicle maintenance, I view the issue of idling with the air conditioning on very practically: it most commonly leads to engine carbon buildup and rapid battery discharge. Carbon deposits can cause incomplete combustion in the engine, leading to subsequent misfires and frequent malfunctions; with the air conditioning adding load, the alternator is under pressure, and prolonged idling can easily cause the battery to age prematurely. I've seen countless car owners come in for repairs due to this habit. I recommend first checking the battery status—if the charge is low, recharge it promptly, and maintain regular cleaning of the intake tract. For safety, short periods like 5-10 minutes are acceptable, but anything longer should raise caution. Remember, small details can ruin a big car—prevention is better than cure.