![]() Doors are generally operated using cables or electronic actuators. Another method is blocking off the heater core with a door directing part or all the incoming air around the heater core completely, so it does not get heated. The heater vent air temperature is then controlled by using a valve limiting the amount of hot coolant that goes through the heater core. Once the engine has warmed up, the coolant temperature is regulated by the thermostat. ![]() Some larger vehicles have a second heater core in the rear of the vehicle to provide comfort for occupants in the rear. The blower fan for the vehicle's ventilation system forces air through the heater core to transfer heat from the coolant to the cabin air, which is directed into the vehicle through vents at various points including the floor board area, the center dash area, and the windshield area. Hot coolant passing through the heater core gives off heat before returning to the engine cooling circuit. The hot coolant is diverted into the cabin through heater hoses and then goes into the heater core, which is a smaller version of the radiator.Ī heater core is located within the dashboard of the vehicle and consists of aluminum or brass tubing with fins used to increase surface area. This process enables the radiator to give off engine heat to the atmosphere thereby cooling the engine, and at the same time some of this heat is shared into the cabin of the vehicle to provide warmth for occupants. A lot of this heat is expelled through the exhaust system, but the remaining heat is dissipated and regulated when a mixture of water and antifreeze, also known as coolant, circulates through the engine block and radiator. ![]() An internal combustion engine produces heat when it operates due to friction and combustion. The engine cooling system in the vehicle is directly related to the function of the heating system. Some of the basic components of your vehicle's air conditioning system include the refrigerant, compressor, condenser, receiver drier, expansion valve or orifice tube, evaporator, lines, accumulator, and many of the same HVAC components used in the heating system. The air conditioning system in your vehicle is designed to keep you cool and comfortable when the conditions outside are hot or humid. Some of the basic components of your vehicle's heating system include the heater core, the blower motor and fan, heater hoses, the heater control valve, the HVAC (heater, ventilation, air conditioning) control panel on your dash board, and the cabin air filter. The heating system in your vehicle is designed to keep you warm, comfortable, and safe when the temperature outside is cold.
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