Is It Okay to Run the AC for 3 Hours While Parked?

[CodyAnn]

It is not advisable to run the AC for 3 hours while parked. Doing so not only affects the lifespan of the engine and battery but also poses serious health risks. If you need to rest while parked, it's best to partially open the windows (while ensuring safety) to allow proper air circulation inside the vehicle. Below are additional details: 1. Accelerated Engine Wear: Running the AC while idling causes the engine to operate at low RPM, reducing oil pump pressure. This results in insufficient lubrication between engine friction surfaces, leading to faster wear. 2. Reduced Engine Lifespan: At very low RPM, the engine experiences reduced intake pressure, prompting it to increase throttle opening and fuel injection. This leads to incomplete combustion, carbon buildup in the combustion chamber, and ultimately shortens engine life. These issues may later manifest as difficulty starting, poor acceleration, and increased fuel consumption. 3. Safety Hazard: Incomplete fuel combustion in the cylinders produces high concentrations of carbon monoxide, which can enter the cabin through the AC's external circulation system. This may cause carbon monoxide poisoning, potentially leading to severe consequences including fatalities for vehicle occupants.