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The heater core is an essential component of a vehicle's heating system, playing a crucial role in maintaining cabin comfort during colder months. Essentially, it is a small radiator located inside the dashboard that uses hot engine coolant to produce heat. As the engine runs, coolant circulates through the heater core, where it transfers heat to the air blown into the cabin by the vehicle’s blower fan. This process not only warms up the interior but also helps to defrost windows a...