Heating and A/C systems operate to keep your vehicle cabin warm in the winter and cool in the summer. The A/C system additionally serves a dual function of operating your defrost in the winter season.
Heating systems are comprised of a heating system core that acts like a small radiator behind the dash, fan, and hoses that run the heat from the engine to the core. Air conditioning systems work similarly, by bringing coolant to the fan to blow cool air in the cabin.
Unlike home cooling and heating systems, your heating system and air conditioning do not entirely operate off electric elements, but they make use of the engine’s heat and the engine’s cooling down abilities to alter the temperature level.