Jeep Liberty KJ. Manual — part 1413

DUCT-FLOOR DISTRIBUTION

REMOVAL

NOTE: LHD model shown in illustration. RHD
model similar.

1. Remove the HVAC Housing and place it on a work-

bench (Refer to 24 - HEATING & AIR CONDITION-
ING/DISTRIBUTION/HOUSING-HVAC

-

REMOVAL).

2. Remove the three screws (1) that secure the floor

distribution duct (2) to the bottom of the HVAC
housing (3).

NOTE: If the foam seal on the floor distribution
duct is deformed or damaged, the foam seal must
be replaced.

3. Remove the floor distribution duct from the HVAC

housing. If the foam seal on the floor distribution
duct is deformed or damaged, the seal must be
replaced.

INSTALLATION

NOTE: LHD model shown in illustration. RHD
model similar.

NOTE: If the foam seal on the floor distribution
duct is deformed or damaged, the foam seal must
be replaced.

1. Position the floor distribution duct (2) onto the bot-

tom of the HVAC housing (3).

2. Install the three screws (1) that secure the floor

distribution duct to the HVAC housing. Tighten the
screws to 2 N·m (17 in. lbs.).

3. Install the HVAC housing (Refer to 24 - HEATING

& AIR CONDITIONING/DISTRIBUTION/HOUSING-
HVAC - INSTALLATION).

24 - 54

DISTRIBUTION

KJ

DUCT-REAR FLOOR HEAT

REMOVAL

1. Remove the floor console (Refer to 23 - BODY/IN-

TERIOR/CONSOLE-FLOOR - REMOVAL).

2. Remove the push-pin retainer (2) that secures the

rear floor heat duct (1) to the floor console bracket
(3) located behind the gear shift lever assembly
(4).

3. Disconnect the rear floor heat duct from the floor

distribution duct (5).

4. Remove the rear floor heat duct from the vehicle.

INSTALLATION

1. Position the rear floor heat duct (1) into the vehicle.

2. Connect the rear floor heat duct to the floor distri-

bution duct (5) located in front of the gear shift
lever assembly (4).

3. Install the push-pin retainer (2) that secures the

rear floor heat duct to the floor console bracket (3).

4. Install the floor console (Refer to 23 - BODY/INTE-

RIOR/FLOOR CONSOLE - INSTALLATION).

KJ

DISTRIBUTION

24 - 55

HOUSING-HVAC

DESCRIPTION

All models are equipped with a common HVAC hous-
ing assembly (1) that combines A/C and heating capa-
bilities into a single unit mounted within the passenger
compartment. The HVAC housing consists of the fol-
lowing:

•

HVAC housing — The HVAC housing consists
of an upper housing and a lower housing that
are

attached

together

by

screws

and

are

mounted to the dash panel behind the instrument
panel. The HVAC housing contains the heater
core (2), A/C evaporator (3), blower motor (7),
blower motor resistor (9), blend-air doors and
actuator (10), HVAC vacuum harness (11), floor
distribution duct (12), foam seals (13 ) and the
mode-air doors and actuators (14).

•

Air inlet housing — The air inlet housing (4) is
mounted to the right end of the HVAC housing
and contains the foam seal (5), recirculation-air
door (6) and the recirculation door actuator (8).

The heating-A/C system is a blend-air type system. The two blend-air doors control the amount of conditioned air
that is allowed to flow through, or around, the heater core. This single zone heating-A/C system uses only one blend
door actuator.

The A/C system is designed for the use of a non-CFC, R-134a refrigerant and uses an A/C evaporator 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, which moves the blend-air doors. This allows an almost imme-
diate control of the output air temperature of the system. The two mode door actuators operate the mode-air doors
which direct the flow of the conditioned air out the various air outlets, depending on the mode selected. The recir-
culation door actuator operates the recirculation-air door which closes off the fresh air intake and recirculates the air
already inside the vehicle. The blower motor controls the velocity of air flowing through the HVAC housing assembly
by spinning the blower wheel within the HVAC housings at the selected speed by use of the blower motor resistor.

The HVAC housing must be removed from the vehicle for service of the heater core and the air inlet housing, and
disassembled for service of the A/C evaporator, blend-air and mode-air doors. The air inlet housing must be
removed and disassembled for service of the recirculation-air door.

REMOVAL

HVAC HOUSING

WARNING: Refer to the applicable warnings and cautions for this system before performing the following
operation (Refer to 24 - HEATING & AIR CONDITIONING/PLUMBING - WARNINGS) and (Refer to 24 - HEAT-
ING & AIR CONDITIONING/PLUMBING - CAUTIONS). Failure to follow the warnings and cautions could result
in possible personal injury or death.

WARNING: On vehicles equipped with airbags, disable the airbag system before attempting any steering
wheel, steering column, or instrument panel component diagnosis or service. Disconnect and isolate the
battery negative (ground) cable, then wait two minutes for the airbag system capacitor to discharge before
performing further diagnosis or service. This is the only sure way to disable the airbag system. Failure to
take the proper precautions could result in an accidental airbag deployment and possible personal injury or
death.

NOTE: The HVAC housing must be removed from the vehicle and disassembled for service of the A/C evap-
orator and the mode-air and blend-air doors.

24 - 56

DISTRIBUTION

KJ

NOTE: LHD model shown in illustrations. RHD model similar.

1. Disconnect and isolate the negative battery cable.

2. Recover the refrigerant from the refrigerant system

(Refer to 24 - HEATING & AIR CONDITIONING/
PLUMBING

-

STANDARD

PROCEDURE

-

REFRIGERANT SYSTEM RECOVERY).

3. Drain the engine cooling system (Refer to 7 -

COOLING - STANDARD PROCEDURE - COOL-
ING SYSTEM DRAIN).

4. Remove the instrument panel from the passenger

compartment (Refer to 23 - BODY/INSTRUMENT
PANEL ASSEMBLY - REMOVAL).

5. Disengage the three retaining straps (1) that

secure the dash panel wire harness (2) to the top
of the HVAC air inlet housing (3) and position the
wire harness out of the way.

6. Remove the two nuts that secure the A/C accumu-

lator to the dash panel and disconnect the refriger-
ant lines from the A/C evaporator (Refer to 24 -
HEATING & AIR CONDITIONING/PLUMBING/AC-
CUMULATOR-A/C - REMOVAL) and (Refer to 24 -
HEATING

&

AIR

CONDITIONING/PLUMBING/

LINE-A/C LIQUID - REMOVAL).

7. Install plugs into or caps over the opened refriger-

ant line fittings and evaporator ports

8. Disconnect the heater hoses from the heater core

tubes and install plugs into or caps over the heater
core tubes.

9. Disconnect the HVAC system vacuum supply line

from the engine vacuum harness at the connector
located near the evaporator tapping block.

10. Remove the condensation drain tube (Refer to 24

- HEATING & AIR CONDITIONING/PLUMBING/
TUBE-CONDENSATION DRAIN - REMOVAL).

11. Remove the one nut (2) that secures the HVAC

housing (4) to the engine compartment side of the dash panel (1).

12. Remove the two nuts (3) that secure the HVAC housing to the passenger compartment side of the dash panel.

13. Pull the HVAC housing assembly rearward so that the mounting studs and condensate drain clear the dash

panel and remove the HVAC housing from the passenger compartment.

14. If required, remove the four retaining nuts (6) and the fresh air inlet screen (5) from the top of the dash panel.

AIR INLET HOUSING

WARNING: Refer to the applicable warnings and cautions for this system before performing the following
operation (Refer to 24 - HEATING & AIR CONDITIONING/PLUMBING - WARNINGS) and (Refer to 24 - HEAT-
ING & AIR CONDITIONING/PLUMBING - CAUTIONS). Failure to follow the warnings and cautions could result
in possible personal injury or death.

KJ

DISTRIBUTION

24 - 57