Does Using Air Conditioning While Parked Damage the Car?

[StMadelyn]

Using air conditioning while parked can indeed harm the vehicle. Keeping the car idling with the AC on for extended periods leads to several issues: it increases fuel consumption, accelerates engine carbon buildup, and in poorly ventilated areas or garages, may cause carbon monoxide poisoning for occupants. Below are the specific hazards of leaving the air conditioning on while the car is parked: 1. Carbon Monoxide Production: When the engine runs, incomplete combustion in the cylinders can produce high concentrations of carbon monoxide. While driving, air flow through the AC system ensures low CO levels inside. However, when parked with AC on and windows closed, stagnant air allows CO from the exhaust to accumulate, potentially leading to poisoning or fatalities. 2. Battery Drainage: Although the AC compressor is engine-powered, the blower fan relies on the battery. During idling, the alternator may not sufficiently recharge the battery, causing prolonged power depletion from continuous blower operation. 3. Engine Carbon Deposits: Extended AC use while idling increases fuel consumption and significantly contributes to carbon buildup within the engine components.