How a Car's Heating System Works

One of the most important parts of a car's engine is its heating system. It keeps the vehicle's engine sufficiently warm so that it continues working but makes sure that it is cool enough to avoid overheating. Not only does it keep the engine running, but the system also provides warmth to the passenger cabin in cold weather.

To understand how it works, it is important to know why a car's engine produces a lot of heat. A vehicle's engine is hot because of the massive amount of friction produced by its working parts as well as the combustion of gas in its cylinders. When the engine becomes hot enough, a thermostat similar to the one in your home activates. It opens a valve and lets a coolant flow through the engine. A coolant, usually water or a special kind of insulating liquid, is pumped into the engine to help get rid of the heat. As the coolant draws the heat away, the liquid becomes extremely hot.

The coolant is pumped out of the car engine and travels to a heat core. Here, the device draws away the liquid's heat, returning the coolant back to its normal temperature. The core, on the other hand, becomes very hot after a few minutes. Now, when you turn on the heat, a fan mounted behind the heat core turns on. This action blows cold air into the core, warming the air up. The warm air is now forced into vents that lead to the car's passenger cabin, making the interior warm and cosy. Because a car's heating system is quite complex, fixing any problems with it should be best left to a professional.