floor-defrost, the panel-defrost, the blend-air, and the
recirculation air (if the vehicle is so equipped) doors
are properly positioned.
(7) Reinstall the push nut that secures the heater-
A/C housing cover to the heater-A/C housing post.
(8) Install the thirteen screws that secure the
perimeter of the housing cover to the heater-A/C
housing. Tighten the screws to 2.2 N·m (20 in. lbs.).
(9) Snap the panel-defrost door lever onto the pan-
el-defrost door pivot shaft.
(10) Install the blend-air door lever to the blend-
air door pivot shaft and secure it to the shaft with
the nut.
(11) Install the vacuum harness retainer into the
hole near the left end of the heater-A/C housing
cover.
(12) Route the vacuum harness through the
molded clips on the heater-A/C housing cover.
(13) Turn the heater-A/C housing over on the work
bench, with the heater-A/C housing cover facing
down.
(14) Install the two screws that secure the heater-
A/C housing cover to the lower housing near the floor
outlet. Tighten the screws to 2.2 N·m (20 in. lbs.).
(15) Position the floor duct to the bottom of the
heater-A/C housing and secure with four screws.
Tighten the screws to 2.2 N·m (20 in. lbs.).
(16) Plug in the vacuum harness connector to the
panel-defrost door actuator.
(17) If the vehicle is so equipped, plug in the two
vacuum harness connectors to the recirculation air
door actuator.
(18) Install the two screws that secure the heater-
A/C housing cover to the top of the blower motor
housing cover. Tighten the screws to 2.2 N·m (20 in.
lbs.).
(19) Reinstall the heater-A/C housing in the vehi-
cle.
INSTALLATION
(1) Position the heater-A/C housing to the dash
panel. Be certain that the evaporator condensate
drain tube and the housing mounting studs are
inserted into their correct mounting holes.
(2) Install the nut that secures the heater-A/C
housing mounting brace to the stud on the passenger
compartment side of the dash panel. Tighten the nut
to 11 N·m (95 in. lbs.).
(3) Engage the front floor panel transmission tun-
nel duct with the adapter on the heater-A/C housing.
(4) Install and tighten the four nuts onto the heat-
er-A/C housing mounting studs on the engine com-
partment side of the dash panel. Tighten the nuts to
7 N·m (60 in. lbs.).
(5) Unplug or remove the tape from the heater
core tubes. Connect the heater hoses to the heater
core tubes and fill the engine cooling system. Refer to
Group 7 - Cooling System for the procedures.
(6) Reinstall the front expansion valve to the evap-
orator tube mounting flange. See Expansion Valve in
the Removal and Installation section of this group for
the procedures.
(7) Evacuate the refrigerant system. See Refriger-
ant System Evacuate in the Service Procedures sec-
tion of this group.
(8) Charge the refrigerant system. See Refrigerant
System Charge in the Service Procedures section of
this group.
(9) Reinstall the instrument panel in the vehicle.
Refer to Instrument Panel Assembly in the Removal
and Installation section of Group 8E - Instrument
Panel Systems for the procedures.
(10) Connect the battery negative cable.
(11) Start the engine and check for proper opera-
tion of the heating and air conditioning systems.
HEATER-A/C HOUSING DOOR
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, REFER TO GROUP 8M - PASSIVE
RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY
STEERING WHEEL, STEERING COLUMN, OR
INSTRUMENT PANEL COMPONENT DIAGNOSIS OR
SERVICE. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
BLEND-AIR DOOR
(1) Remove the heater-A/C housing from the vehi-
cle, and remove the housing cover. See Heater-A/C
Housing in the Removal and Installation section of
this group for the procedures.
(2) Lift the blend-air door pivot shaft out of the
pivot hole in the bottom of the heater-A/C housing
(Fig. 68).
(3) Reverse the removal procedures to install.
Fig. 67 Heater-A/C Housing Cover Sealant
1 – HEATER-A/C HOUSING COVER
2 – SEALANT
DN HEATING AND AIR CONDITIONING 24 - 57
REMOVAL AND INSTALLATION (Continued)
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