Is it okay to idle the car overnight with the air conditioning on?

[VonBrooke]

It is possible to idle the car overnight with the air conditioning on, but the main concern is fuel consumption. Here are some relevant points about idling with the air conditioning on: 1. Fuel consumption: There is no problem with idling and running the air conditioning, but the biggest issue is definitely fuel consumption, followed by waste. When driving with the air conditioning on, the power consumed by the air conditioning only accounts for a very small part of the engine's idle energy. However, when idling with the air conditioning on, the engine not only has to drive the air conditioning compressor but also needs to maintain the normal operation of the power steering and brake booster pumps. The latter two functions are completely unnecessary when parked, so keeping them running is a waste of power. 2. Harm to humans: Because the air inside the car cannot circulate, if carbon monoxide from the engine leaks into the car, it will gradually accumulate and increase in concentration, leading to poisoning.