Does running the AC while parked in summer cause significant damage to the car?

[DelNathan]

Running the AC while parked in summer can cause significant damage to the car. Here are the specific details: 1. Battery drain: Excessive power consumption by the blower may lead to prolonged battery drain. Keeping the AC on for extended periods while idling increases fuel consumption and engine carbon buildup. 2. Engine carbon buildup: Incomplete fuel combustion can lead to carbon deposits inside the engine, affecting its lifespan and being environmentally unfriendly. Prolonged idling at low speeds is highly prone to carbon buildup, which can reduce power output. While the car won't break down immediately, it can cause a certain degree of engine wear, potentially requiring more frequent maintenance intervals.

[DeAllie]

Parking with the air conditioning on in summer does cause some damage to the car, but it's not too severe. As someone who drives frequently, I know the AC relies on the engine, and prolonged idling increases the load, leading to higher fuel consumption and carbon buildup. When the engine temperature is high, insufficient lubrication accelerates wear and also affects battery life. While this is common in hot climates, avoid doing it for too long, such as overnight, otherwise fuel costs will rise quickly and repair bills will add up. It's advisable to park in the shade or open windows to ventilate and cool down before starting the car. Regular engine maintenance can reduce such issues—don't worry too much, but don't ignore it either.

[Rivera]

As a veteran driver who has driven all my life, idling with the AC on is really not good. Running the AC with the engine off leads to carbon buildup, and fuel consumption is significantly higher than normal driving. Once in summer, I forgot to turn off the AC and left it running for half a day, and later the car wouldn't start—the battery was completely drained and had to be replaced. Exhaust fumes can also backflow in an enclosed space, which is unsafe and can cause dizziness. Avoid doing this in daily life; if it's really hot, use a fan or open the windows briefly. A well-maintained car will naturally last longer. It saves us both money and hassle—don't lose big for small gains.

[MacCamille]

Running the AC while parked in summer is quite wasteful, something I often encounter as an office worker. Fuel consumption increases rapidly, making the bills painfully high. The engine idles inefficiently, prone to overheating and component wear, while the battery also ages faster. It's economically unsound and emits more exhaust, polluting the environment. After trying it a few times, I found it better to briefly air out the car before driving off, avoiding prolonged operation—this way, the car lasts longer. I recommend planning trips according to the weather and minimizing parking with the AC on.