What is the impact of turning off the engine directly without turning off the air conditioner while driving?

[OGideon]

Turning off the engine directly without turning off the air conditioner while driving can affect the lifespan of the engine. Here is an introduction to car air conditioning: 1. Introduction: Car air conditioning refers to the air conditioning device installed in a car. 2. Function: It can cool, heat, ventilate, and purify the air inside the cabin, providing a comfortable environment for passengers, reducing driver fatigue, and improving driving safety. The air conditioning system has become one of the indicators to measure whether a car is fully equipped. 3. Components: Generally, it includes a cooling device, heating device, and ventilation device. This combined system makes full use of the limited space inside the car, has a simple structure, and is easy to operate, making it a popular modern car air conditioning system internationally.

[AlyssaDella]

I've noticed that turning off the car without switching off the AC first can have significant impacts on the vehicle, mainly because the engine bears a heavier load during the next startup. When the car is restarted with the AC still on, the compressor kicks in immediately, placing a sudden surge of electrical load on the starter and working circuits. Over time, this practice can lead to overheating or accelerated wear of the starter, as well as premature aging of the battery. Especially in extreme hot or cold weather, the car is more prone to startup difficulties or sudden stalling, which compromises driving safety. To maintain my car's health, I always make it a habit to turn off the AC before shutting down the engine. This avoids unnecessary stress and saves on repair costs. Owners of older cars should pay extra attention to this habit. Although newer cars have higher automation, developing good habits is always beneficial to prevent minor issues from snowballing into major problems.

[DiMargaret]

As an average car owner, I often get lazy and turn off the engine without shutting down the AC first, thinking it's no big deal since modern cars are smartly designed with auto power-off for the AC system. However, during scorching summer days, I've truly experienced it – the next engine start feels noticeably harder, and there's a vibration as soon as the AC blows air. This is likely because the compressor loads instantly, causing a surge in starting current. Over time, this accelerates battery degradation, and replacing it costs a few hundred bucks, which isn't cheap. My advice is to manually turn off the AC before parking, especially in winter to prevent freezing damage and avoid idling wear. Overall, the impact is minor, but saving where you can is kinder to your wallet and reduces a bit of energy waste for the environment.

[VonDaniella]

In my car repair experience, turning off the engine without switching off the AC is common but not recommended. The key issue occurs during startup: when the AC is on during ignition, the compressor starts running immediately, placing additional current load on the starter. This may lead to circuit short circuits or fuse blowouts, especially in older vehicles where problems are more likely to occur. The battery is also prone to over-discharge, shortening its lifespan. A simple preventive measure is to develop the habit of turning off the AC before shutting down the engine, costing nothing. If you notice abnormal noises during startup or dimming lights, it's time to check the electrical system.