Does leaving the car air conditioner on overnight affect the vehicle?

[FernandoRose]

Leaving the car air conditioner on overnight does affect the vehicle, with specific impacts as follows: 1. Impact on the engine: It can cause incomplete combustion during engine operation. According to the engine's working principle, the engine generates power by burning the air-fuel mixture. Under idle conditions, the intake airflow velocity slows down, making it prone to vortex formation. 2. Carbon buildup: Idle conditions lead to incomplete combustion of the air-fuel mixture, resulting in carbon deposits in both the intake tract and the cylinder. Over time, carbon buildup can affect the engine's intake system and its operation, causing abnormal wear on internal components such as the cylinder. In severe cases, it may lead to cylinder scoring.