Does leaving the car running with the AC on consume fuel?

[McAubree]

Leaving the car idling with the AC on consumes a relatively high amount of fuel, typically around 2L/h. Here are some reasons why the AC might not be cooling: 1. Internal damage: Severe wear inside the compressor can prevent it from functioning properly. 2. Oil stains: Oil stains at connection points or seams indicate refrigerant leakage, requiring reinforcement or replacement of the affected parts. 3. Circuit system failure: Faults in the circuit system are also a common reason why the car's AC compressor may not work properly. You can check if the circuit is functioning smoothly, inspect the temperature sensor solenoid valve, and look for other potential faults.