Operation

OPERATION





Engine coolant is circulated through heater hoses to the Heater Core (3) at all times. As the coolant flows through the Heater Core (3), heat removed from the engine is transferred to the Heater Core fins and tubes. Air directed through the Heater Core picks up the heat from the Heater Core fins. The temperature control door allows control of the heater output air temperature by controlling how much of the air flowing through the HVAC housing is directed through the Heater Core (3). The blower motor (2) speed controls the volume of air flowing through the HVAC housing.

The heater core cannot be repaired and, if faulty or damaged, it must be replaced. Removal. Refer to Cooling for more information on the engine cooling system.