The heater fan blows air through the heater core and into the passenger compartment of your car. A heater core looks like a small radiator. The heater core draws its hot coolant from the cylinder head and returns it to the pump -- so the heater works regardless of whether the thermostat is open or closed.How do car heaters work?
In cars with air-cooled engines, air for the interior heater can be warmed by ducting it around fins on the hot exhaust manifold. The warmed air is mixed to the right temperature by an air-blending system, including a heat-sensitive valve that keeps the temperature steady and at a comfortable level for the occupants.How does car heater work?
A car heater is the part of your car that regulates the internal temperature of your car's system. It provides the optimum temperature required to start your car's engine. Due to the high temperature caused by the engine or motor and combustion of fuel, a lot of heat is generated inside the car system.