Durango 2WD V8-4.7L (2008)
Heater Core: Description and Operation
Rear Heater Core - Operation
OPERATION
Engine coolant is circulated through heater hoses and tubes to the rear 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 the air directed through the heater core picks up the heat from the fins. The rear blend
air door allows control of the rear heater output air temperature by controlling the amount of air flowing through or around the rear heater core. The rear
blower motor speed controls the volume of air flowing through the rear heater-A/C housing.
The rear heater core cannot be repaired and must be replaced if found to be inoperative, leaking or damaged.
