Can You Get Carbon Monoxide Poisoning by Sleeping in a Car with the AC On?
2 Answers
Leaving the car idling for a long time with the AC on can lead to carbon monoxide poisoning. When the engine runs at idle for an extended period, incomplete combustion of gasoline produces high concentrations of carbon monoxide, which can enter the car and poison passengers. Additional Information: Methods to prevent carbon monoxide poisoning are as follows: 1. Avoid letting the engine idle for too long while driving. 2. Do not keep the AC running for an extended period when the car is parked. 3. Stop and rest immediately if you feel unwell. 4. Open the windows for ventilation before driving. After the car has been exposed to the sun, do not rush to drive—first open all four doors to ventilate and release toxic gases.
As a car enthusiast, I often discuss this topic with others and believe that sleeping in a car with the air conditioning on is indeed very dangerous. The main reason is that carbon monoxide comes from engine exhaust. If the air conditioning is set to recirculate, exhaust fumes may accumulate inside the car, especially when parked in a garage or a poorly ventilated area, increasing the risk of poisoning. I recall real-life cases where people fell asleep with the heater on during extremely cold weather and suffered tragic consequences. Carbon monoxide is odorless and colorless, and inhaling too much can cause dizziness, vomiting, and even be fatal in severe cases. Therefore, for safety, avoid sleeping in a running car. If you must rest, crack open a window or set the air conditioning to fresh air mode. Also, always choose open, well-ventilated spaces for parking—ventilation is key.
