Is it safe to sleep in a car with the air conditioning on in summer?
2 Answers
It is not safe to sleep in a car with the air conditioning on in summer, as it may lead to carbon monoxide poisoning, which is extremely dangerous. It is advised not to do so. The car air conditioning is an important comfort feature in a vehicle, capable of both cooling and heating. When cooling, the AC button needs to be pressed, which engages the compressor clutch, allowing the engine to drive the compressor. The compressor then continuously compresses the refrigerant and delivers it to the evaporator. The car air conditioning system can cool, heat, ventilate, and purify the air inside the cabin, providing a comfortable environment for passengers, reducing driver fatigue, and enhancing driving safety.
Sleeping in the car with the AC on during summer may sound comfortable, but I must warn you it's not a safe choice. After years of driving, I've witnessed too many tragic cases: idling engines emit carbon monoxide, which rapidly accumulates in a closed vehicle and can cause dizziness, unconsciousness, or even death – especially in sweltering weather. Other risks include engine overheating damage and battery drain. Even with the AC running, closed windows prevent air circulation, and rising CO2 levels can make breathing difficult. If you must rest, park in a ventilated, shaded area, crack the windows slightly, and set an alarm to limit sleep duration. Ideally, avoid prolonged stays in the car – safety far outweighs temporary comfort.
