Your vehicle’s heating and ventilation system isn’t just designed for your comfort. In fact, the vehicle you drove to work this morning has a built-in cooling system that cools your engine while it cools you. Pretty neat, eh? But how does this complicated system work? We’re glad you asked. Today, we’re going to discuss how your car heating and ventilation systems work.

Modern cars are designed to have a constant flow of air through your engine and then your interior to keep the temperature both inside the car, and inside the engine at the proper levels.

Ventilation System Basics

The first step to understanding how the ventilation system works is to understand the function of the main vent at the front of the car. Because the car is moving forward, air is forcibly pushed into that vent and distributed to the various parts of the engine and interior cabinet. Based upon the temperature outside, and the internal temperature gauge attached to your engine, your car will either heat or cool the air coming in through your vents.

Two Methods of Heating and Cooling

There are two main methods by which the air’s temperature can be manipulated. The first is called the water valve system. This system is constructed with heating coils that form a matrix. This matrix is heated or cooled to the desired temperature, and all of the air passing through the vents must go through the matrix. This either heats or cools them to the desired temperature.

The second method of temperature control is called the air blending system. This system employs hot air from the engine, and cool air from the matrix to blend the currents to create the desired temperature. When stationary, most cars have an electrically controlled fan that is switched on to avoid overheating.

Newer Technologies

Both of these methods have their uses but in many modern cars, the system used to ventilate the vehicle uses power assisted controls worked by the vacuum in the inlet manifold. This method is the most advanced of all of them, and may take some further reading to understand completely. Although modern technology is slowly moving towards more efficiency, there is no guarantee that a new car on the market will feature the latest of everything.

So there you have it, your car heating and ventilation systems in a nutshell. We hope that helped appease a little bit of your curiosity. When in need of professional auto repair, be sure to give the professionals at City Garage DFW a call!

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