Is it necessary to start the car to turn on the air conditioning?
3 Answers
It is necessary to start the vehicle to use the air conditioning normally because the air conditioning compressor must rely on the engine operation as the power source. The concept and function of car air conditioning: The car air conditioning device (air-conditioning-device), referred to as car air conditioning, is used to adjust and control the temperature, humidity, air cleanliness, and air flow inside the car cabin to the optimal state. It can provide a comfortable riding environment for the driver, reduce travel fatigue, and create good working conditions for the driver to ensure driving safety. How car air conditioning works: When the weather is hot and the air conditioning needs to be turned on for cooling, press the AC button, and the compressor system starts to work normally, and cold air will blow out from the air outlet.
I've been driving for many years, and when using the air conditioning, you really need to start the engine; otherwise, the compressor won't work. Only the fan can blow some air, but it won't be cold. I remember one summer when I parked in a park to take a short nap, I only turned on the fan without starting the engine. In less than an hour, the battery alarm went off, and the car almost wouldn't start. Since then, I've always started the engine before turning on the air conditioning. The battery drains quickly and can cause problems. The ventilation mode can be used alone, but cooling requires the engine's power. For safety's sake, don't be lazy.
As a car enthusiast, I've studied air conditioning systems, and the core issue is that the compressor requires engine power. If you don't start the car, you can only turn on the fan to circulate air, which uses battery power but doesn't provide cooling. Modern hybrid models are different, as the battery can directly power the system, but for traditional cars, the old rule still applies: the engine must be running for the AC to cool. You can test this yourself—running the fan consumes less power, but avoid prolonged use to prevent battery drain and potential impact on the vehicle's lifespan.
