Grand Caravan V6-3.3L VIN R (2005)
Heater Core: Description and Operation
Rear
Rear Heater Core
The rear heater core is located near the front of the rear HVAC housing, behind the right rear wheel house. It is a heat exchanger made of rows of tubes
and fins. One end of the heater core is fitted with a molded plastic tank that includes the mounting provisions for the heater core and connections for the
heater core inlet and outlet tubes.
The rear heater core can be serviced without removing the rear HVAC housing from the vehicle.
Engine coolant is circulated through underbody heater hoses to the rear heater core at all times. As the coolant flows through the rear 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 rear blend-air door allows control of the rear heater output air temperature by controlling how much of the air flowing through the rear HVAC
housing is directed through the rear heater core.
The rear heater core cannot be repaired and, if faulty or damaged, it must be replaced.
