How much fuel does car air conditioning consume in one hour?

1 Answers
DelilahLee
07/30/25 8:56am
Running the air conditioning consumes approximately 1.4-2.5 liters of fuel depending on the vehicle's displacement, with an average of about 1.6 liters. While idling with the AC on doesn't actually consume much fuel, it's harmful to the engine as it can lead to carbon buildup and may cause the catalytic converter to overheat and become damaged. Below are specific impacts of idling with the AC on: 1. Carbon buildup: The compressor operates by relying on the engine's idle speed, which can result in incomplete fuel combustion and easy formation of carbon deposits. 2. Toxic substances: Incompletely burned fuel can produce toxic substances such as carbon monoxide. With the car windows and doors tightly closed for an extended period, exhaust gases can enter the enclosed cabin and accumulate to a level that may cause carbon monoxide poisoning.
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