Is it okay to run the engine and use the air conditioning in the car?
3 Answers
Impact of running the engine and using the air conditioning: If the car is left idling for a long time with the air conditioning on, it can lead to increased carbon deposits in the engine. The cooling principle of a car's air conditioning system is relatively simple. When cooling, the compressor clutch engages, and the engine drives the compressor to operate. Here is an introduction to the precautions for using car air conditioning: Refrigerant continuously expands and absorbs heat: The refrigerant can continuously expand and absorb heat in the evaporator, thus cooling it. The cooled evaporator can then cool the air blown by the blower, allowing the car's air conditioning vents to blow cold air. Regularly add refrigerant: The refrigerant used in car air conditioning is R134a, and it needs to be replenished periodically. If refrigerant is not added for a long time, the cooling effect of the air conditioning will deteriorate, and the cooling speed will slow down. It is recommended to regularly add refrigerant to the car's air conditioning system. Regularly clean the car's air conditioning: Many bacteria can grow inside the air conditioning system. When cleaning the air conditioning or adding refrigerant, it is essential to go to a professional institution and have experts perform the operation using professional equipment.
Well, I think many people like to do this in summer, such as starting the car to run the air conditioner while waiting for their wife and kids to get off work or picking up a package. From a safety perspective, this is completely feasible, but you need to pay attention to the location. If you're in an enclosed space like your own garage, you absolutely must not do this. Because when the engine is running, it produces carbon monoxide—that stuff is odorless and colorless, but inhaling too much can cause poisoning, fainting, or even worse. There are often reports online of people getting into trouble after idling in a garage for a few hours. To be safe, I recommend doing this only in open parking lots or outdoor areas, cracking the windows slightly to maintain ventilation and avoid risks. Additionally, the car's air conditioner is quite efficient and can cool things down in just a few minutes. Keeping the engine idling with the AC on for a long time not only wastes gasoline but also puts extra strain on the engine and increases carbon buildup. Overall, it's not a problem—the key is choosing the right environment to ensure your health and safety come first.
When the weather gets hot, turning on the air conditioning in the car is indeed quite comfortable, especially after returning from a trip or shopping. Taking a short nap in the car is super relaxing. I think it's perfectly fine to start the car and enjoy the AC, but avoid doing it in enclosed spaces like underground parking lots. The car's air conditioning relies on the engine running to power the cooling system. Even if the car isn't moving, it can still blow cold air, and the efficiency is quite high—just keep the windows open for ventilation. I occasionally do this, like during a lunch break under the shade of a tree, enjoying the AC and some music, which feels very pleasant. As long as you don't stay too long, it saves fuel and hassle, with no need to worry about mechanical issues. However, it's important to remind everyone that regular maintenance of the car's air conditioning system is crucial. Otherwise, refrigerant leaks or excessive odors can affect comfort. In short, this is a little life hack—just remember to stay away from enclosed environments and enjoy it.
