CORE-HEATER
DESCRIPTION
The heater core (1) for the front heating-A/C system is
located in the front HVAC housing, behind the instru-
ment panel. It is a heat exchanger made of rows of
tubes and fins. The heater core is secured to the
HVAC housing by a plastic retaining bracket and
screws. The heater core tubes (2) are attached to the
top of the heater core by metal retaining clips (3) and
O-ring seals.
The heater core for the front heating-A/C system can
be serviced in the vehicle without removing the HVAC
assembly.
OPERATION
Engine coolant is circulated through the heater hoses to the heater core at all times. As the coolant flows through
the heater core, heat is removed from the engine and 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 regulating the amount of air flowing through the heater core within the HVAC housing. 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.
REMOVAL
1. Drain the engine cooling system (Refer to 7 -
COOLING - STANDARD PROCEDURE - COOL-
ING SYSTEM DRAIN).
2. Raise and support the vehicle.
3. Remove the right front wheelhouse splash shield
(Refer to 23 - BODY/EXTERIOR/LF WHEEL-
HOUSE SPLASH SHIELD - REMOVAL).
4. Remove the heater hoses (1) from the heater core
tubes (2) in the engine compartment.
HB
PLUMBING - FRONT
24 - 441