It seems so simple; turn on the car’s air conditioner and cool air comes out.

But the air conditioning systems in cars are complex and involve Freon, which is akin to blood in the body. Basically, Freon is a gas and liquid combination that circulates through a car’s system.When it is pushed under pressure through hoses and an expansion value, the gas expands and contracts. Basically, this is what makes the cold air come through the vents in the car’s dashboard.