There are essential car maintenance hacks and tips that should keep any vehicle roadworthy, but the A/C is a different story. In most cases, the air-conditioning is one of the most neglected maintenance items in a car, and you won’t notice something’s wrong until the system erratically blows hot air instead of a cool, dehumidifying breeze. The air-conditioning in a modern car works by controlling the pressure and temperature to transform a refrigerant (typically called Freon in the HVAC parlance)
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