Durango 2WD V8-4.7L VIN N (2001)
Heater Core: Description and Operation
HEATER CORE - FRONT
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.
REAR HEATER CORE
The rear heater core is located in the heater-A/C housing in the right rear inside quarter 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/tubes 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 air door allows control of the heater output air temperature by controlling how much of the air flowing through the heater-A/C housing is
directed through the heater core. The blower motor speed controls the volume of air flowing through the heater-A/C housing. The heater core
cannot be repaired and, if faulty or damaged, it must be replaced. Refer to Cooling System for more information on the engine cooling system, the
engine coolant and the heater hoses.
