Commander 4WD V8-4.7L VIN N (2006)
Heater Core: Description and Operation
Rear Heater Core
CORE-HEATER
DESCRIPTION
The rear heater core (1) is located in the rear HVAC housing, behind the right interior quarter trim panel. The rear heater core is a heat exchanger made
of rows of tubes and fins and the heater core tubes (3) are attached to the heater core by removable retaining clips (2).
If the rear heater core is found to be leaking or is damaged, it must be replaced.
OPERATION
Engine coolant is circulated through heater hoses and 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 the air directed through the heater core picks up the heat from the 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.
