RAM 1500 Truck 4WD V8-5.9L VIN Z (2002)
Heater Core: Description and Operation
The heater core is located in the HVAC housing, under the instrument panel. It is a heat exchanger made of rows of tubes and fins.
The heater core is not repairable and if damaged it must be replaced.
Engine coolant is circulated through heater hoses to the heater core at all times. As the coolant flows through the heater core, 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 blend 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. The blower motor 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.
