Dodge Durango (HB). Manual — part 1553
1. Using a trim stick or another suitable wide flat-
bladed tool, gently pry the instrument panel demis-
ter outlet(s) (1) out of the instrument panel top pad
(2) as required.
INSTALLATION - DEMISTER OUTLETS
1. Position the instrument panel demister outlet(s) (1)
onto the instrument panel top pad (2).
2. Gently push the demister outlet(s) into the top pad
until it snaps into place.
HB
DISTRIBUTION - FRONT
24 - 405
DISTRIBUTION - REAR
TABLE OF CONTENTS
page
page
DUCT-DISTRIBUTION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 406
. . . . . . . . . . . . . . . . . . . . . . . . 407
HOUSING-HVAC
. . . . . . . . . . . . . . . . . . . . . . . . 407
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 408
. . . . . . . . . . . . . . . . . . . . . . . . 409
. . . . . . . . . . . . . . . . . . . . . . . . . . . 413
. . . . . . . . . . . . . . . . . . . . . . . . 417
MOTOR-BLOWER
. . . . . . . . . . . . . . . . . . . . . . . . 418
. . . . . . . . . . . . . . . . . . . . . . . . . . 419
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 419
. . . . . . . . . . . . . . . . . . . . . . . . 419
OUTLET-AIR
. . . . . . . . . . . . . . . . . . . . . . . . 420
REAR CEILING AIR OUTLET GRILLE
REAR CEILING AIR OUTLET GRILLE
DUCT-DISTRIBUTION
REMOVAL
1. Remove the right interior quarter panel trim (Refer
to 23 - BODY/INTERIOR/QUARTER PANEL TRIM
- REMOVAL).
2. Remove the push-pin fasteners (1) that secure the
rear ceiling distribution duct (2) and the rear floor
distribution duct (3) to the right interior quarter
panel (4).
3. Disconnect the rear ceiling distribution duct from
the rear HVAC housing (5) by sliding the lower half
of the ceiling distribution duct into the upper half of
the ceiling distribution duct.
4. Disconnect the rear ceiling distribution duct from
the headliner duct and remove the ceiling distribu-
tion duct from the vehicle.
5. Disconnect the rear floor distribution duct from the
rear HVAC housing and remove the floor distribu-
tion duct from the vehicle.
24 - 406
DISTRIBUTION - REAR
HB
INSTALLATION
1. Connect the rear floor distribution duct (3) to the
rear HVAC housing (5).
2. Connect the rear ceiling distribution duct (2) to the
headliner duct and the rear HVAC housing. Make
sure that the rear ceiling distribution duct is fully
installed to ensure a good seal.
3. Install the push-pin fasteners (1) that secure the
rear ceiling distribution duct and the rear floor dis-
tribution duct to the right interior quarter panel (4).
4. Install the right interior quarter panel trim (Refer to
23 - BODY/INTERIOR/QUARTER PANEL TRIM -
INSTALLATION).
HOUSING-HVAC
DESCRIPTION
Models equipped with the rear heating-A/C system are equipped with a common rear heater and A/C housing (7)
that combines A/C and heating capabilities into a single unit mounted within the passenger compartment. The rear
heating-A/C system is a blend-air type system. A blend-air door (6) controls the amount of conditioned air that is
allowed to flow through, or around, the heater core (3). The rear A/C system is designed for the use of a non-CFC,
R-134a refrigerant and uses an A/C evaporator (2) to cool and dehumidify the incoming air prior to blending it with
the heated air. A temperature control determines the discharge air temperature by operating the blend door actuator
HB
DISTRIBUTION - REAR
24 - 407
(5) , which moves the blend-air door. This allows an almost immediate control of the output air temperature of the
system. The mode door actuator (8) operates the mode-air door (9) which directs the flow of the conditioned air out
the upper or lower air outlets, depending on the discharge air temperature selected. Both electric actuators are
connected to the vehicle electrical system by the HVAC wire harness (10). The rear blower motor (11) controls the
velocity of air flowing through the rear HVAC housing by spinning the blower wheel within the rear blower motor
housing (1) at the selected speed by use of the rear blower motor resistor block (4).
The rear HVAC housing must be removed from the vehicle and disassembled for service of the A/C evaporator,
heater core, mode-air door, blend-air door and blower motor.
REMOVAL
WARNING: Refer to the applicable warnings and cautions for this system before performing the following
operation (Refer to 24 - HEATING & AIR CONDITIONING/PLUMBING - FRONT - WARNINGS) and (Refer to 24
- HEATING & AIR CONDITIONING/PLUMBING - FRONT - CAUTIONS). Failure to follow the warnings and cau-
tions could result in possible personal injury or death.
NOTE: The rear HVAC housing must be removed from the vehicle and disassembled for service of the A/C
evaporator, heater core, mode-air door, blend-air door and blower motor.
1. Recover the refrigerant from the refrigerant system
(Refer to 24 - HEATING & AIR CONDITIONING/
PLUMBING - FRONT - STANDARD PROCEDURE
- REFRIGERANT SYSTEM RECOVERY).
2. Drain the engine cooling system (Refer to 7 -
COOLING - STANDARD PROCEDURE - COOL-
ING SYSTEM DRAIN).
3. Disconnect and isolate the negative battery cable.
4. Raise and support the vehicle.
5. Remove the nut (1) that secures the rear suction
line (2) and the rear liquid line (3) to the rear evap-
orator extension line tapping plate that extends
through the rear floor panel (4) behind the right
rear wheel housing.
6. Disconnect the rear suction line and liquid line from
the rear evaporator extension line tapping plate.
7. Remove the O-ring seals from the rear suction line
and liquid line fittings and discard.
8. Install plugs in, or tape over the opened refrigerant lines and tapping plate ports.
9. Disconnect the rear heater hoses (5) from the rear heater core tubes that extend through the rear floor panel
behind the right rear wheel housing.
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DISTRIBUTION - REAR
HB
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