Chrysler New Yorker. Manual — part 336

CAUTION: Cap off all lines that are not being
replaced. Cap the expansion valve tubes and all
condenser tubes.

(4) Disconnect filter/drier bracket fastener and

separate bracket from strut panel (there are two hid-
den plastic fasteners to pry out).

(5) Disconnect liquid line fastener at condenser

(M13 Hex).

NOTE: Radiator

upper

crossmember

must

be

removed to access the liquid line fastener. Refer to
Group 23, Body for Removal and Installation proce-
dures.

(6) Remove liquid line from vehicle. Cap off all fit-

tings if reusing to prevent moisture from entering
system.

INSTALLATION

For installation, reverse the above procedures.

Then torque liquid line fasteners as follows: TXV and
condenser: 15 ft–lbs. Plastic bracket and screws:
5 ft–lbs.

MODE DOOR ACTUATOR

The mode door actuator is an electric motor. It

mechanically positions the A/C unit panel/bi-level
door and the floor/defrost door. This actuator con-
tains a feedback strip which allows the computer
control to know the exact position of the mode door
at all times. The mode door actuator is not service-
able and must be replaced if found to be defective.

The mode door actuator is located on the lower left

side of the HVAC unit housing (Fig. 23).

REMOVAL

(1) Open hood and disconnect the negative battery

cable remote terminal from the remote battery post
(Fig. 13).

(2) Remove left and right underpanel ducts.
(3) Remove floor console.
(4) Remove center floor heat adaptor duct.
(5) Remove rear seat heat forward adaptor duct.
(6) Loosen center support bracket and pry rear-

ward to gain access to the actuator.

(7) Remove actuator retaining screws. Then pull

actuator straight down. Upon removal, note the shaft
position of the actuator, because the shaft on this
motor is keyed. When installing new actuator, its
shaft must be positioned in the same location.

(8) Remove electrical connection on actuator.

INSTALLATION

For installation, reverse the above procedures.

RECIRCULATION DOOR ACTUATOR

The recirculation door actuator is located on the

right side of the heater housing (Fig. 23).

The recirculation door actuator is an electric motor.

It mechanically positions the recirculation door in
either the open or closed position. The recirculation
door actuator does not have a feedback signal. The
outside Air/Recirc door actuator is not serviceable
and must be replaced if found to be defective.

REMOVAL

(1) Open hood and disconnect the negative battery

cable remote terminal from the remote battery post
(Fig. 13).

(2) Remove instrument panel. Refer to Group 8E,

Instrument Panel and Systems for Removal and
Installation procedures.

(3) Remove actuator retaining screws. Pull actua-

tor

straight

off

recirculation

door

shaft.

Upon

removal, note the shaft position of the actuator,
because the shaft on this motor is keyed. When
installing new actuator, its shaft must be positioned
in the same location.

(4) Disconnect electrical connection.
(5) Remove recirculation door motor from vehicle.

INSTALLATION

For installation, reverse the above procedures.

SUCTION LINE

REMOVAL

(1) Remove refrigerant from the A/C system using

a refrigerant recovery machine.

(2) Remove one nut holding suction line at expan-

sion valve.

Fig. 23 Mode Door Actuator Location

300M

HEATING AND AIR CONDITIONING

24 - 23

REMOVAL AND INSTALLATION (Continued)

CAUTION: Cap all lines that are not being replaced
and cap the expansion valve tubes.

(3) Remove bolt holding line at compressor using a

6mm allen wrench (3.2/3.5L), or M10 Hex (2.7L).

(4) Remove line by pulling rear end of line up out

of vehicle with compressor end following through the
tie-rod area.

NOTE: 2.7L: The 2 piece suction line is held in
place with a 10mm nut (mid-line fastener) torqued
to 5ft–lbs.

INSTALLATION

For installation, reverse the above procedures.

Tighten TXV and compressor fasteners to 23 N·m (17
ft. lbs). 2.7L: Rail screw and mid-line nut to 7 N·m
(5ft–lbs).

SUN SENSOR

REMOVAL

(1) Open hood and disconnect the negative battery

cable remote terminal from the remote battery post
(Fig. 13).

(2) Remove instrument panel top cover.
(3) Remove two Sun Sensor mounting screws.
(4) Lift sensor out of instrument panel and discon-

nect wiring.

(5) Remove sensor from vehicle.

INSTALLATION

CAUTION: The sun sensor must protrude approxi-
mately 1/4 inch above the instrument panel top
cover. This will ensure proper operation.

For installation, reverse the above procedures.
Some ATC equipped vehicles may exhibit a lack of

passenger comfort in sunny weather. This will not
occur in night operation. This most likely occur in
the early afternoon. Verify that the ATC system is
functioning properly. Inspect the location of the sun
sensor. The sun sensor must protrude approximately
1/4 inch above the instrument panel top cover to
insure proper operation. If the sensor does not pro-
trude 1/4 inch, perform the following procedure:

• Confirm that the top cover is properly installed

• Remove the top cover

• Remove fasteners from sun sensor

• Install one 1/4-20 nut per fastener under the sun

sensor so that it is shimmed higher

• Reinstall the sun sensor. Do not overtighten

screw. If a longer screw is required, use 8-15x1 inch.

SERVICE PORT VALVE CORES

The 3.2 / 3.5L service port valve cores are located

on the top of the manifold (High Side) and front side
of the manifold (Low Side). The 2.7L service port
valve ports are located on the A/C liquid line (high
side) and suction line (low side).

REMOVAL

(1) Remove the valve caps. Remove refrigerant

from

A/C

system

using

a

refrigerant

recovery

machine.

(2) Using a standard valve core tool, remove the

valve core. Be careful to prevent any dirt/debris
from entering the valve core opening or getting
on the replacement valve core.

CAUTION: A valve that is not fully seated can lead
to damage to the valve during evacuation and
charge. This can result in system refrigerant dis-
charge while uncoupling the charge adapters.

INSTALLATION

For installation, reverse the above procedures.

Evacuate and charge the A/C system.

NOTE: When assembling the new valve core into
the manifold, the core should be oiled with clean
ND8 PAG compressor oil.

TEMPERATURE DOOR ACTUATOR

The blend-air (temperature) door actuator is an

electric motor which mechanically positions the tem-
perature door. A feedback strip in the actuator allows
the computer control to know the exact position of
the temperature door at all times. The blend-air door
actuator is not serviceable and must be replaced if
found to be defective.

The temperature door actuator is located at the

bottom of the heater housing at the center tunnel
(Fig. 23).

REMOVAL

(1) Open hood and disconnect the negative battery

cable remote terminal from the remote battery post
(Fig. 13).

(2) Remove left and right underpanel silencer/

ducts.

(3) Remove two screws from actuator which are

accessible from the right side of center stack.

(4) Remove one screw from actuator on left side.
(5) Pull actuator straight down from shaft and dis-

connect electrical connection. Upon removal, note the
shaft position of the actuator, because the shaft on
this motor is keyed. When installing new actuator, its
shaft must be positioned in the same location.

24 - 24

HEATING AND AIR CONDITIONING

300M

REMOVAL AND INSTALLATION (Continued)

INSTALLATION

For installation, reverse the above procedures.

HVAC UNIT HOUSING

REMOVAL

(1) Open hood and disconnect the negative battery

cable remote terminal from the remote battery post
(Fig. 13). This must be done to prevent accidental air
bag deployment.

Remove instrument panel from vehicle. Refer to

Group

8E,

Instrument

Panel

and

Systems

for

Removal and Installation procedures.

(2) Using an A/C recovery unit, remove all R-134a

refrigerant from the A/C system.

(3) Drain the engine cooling system.
(4) Remove air cleaner hose and air distribution

duct from the engine.

(5) Remove spring type fasteners to heater hoses

at the dash panel and remove hoses from heater core.
Plug the heater core inlet and outlet tubes to prevent
anti-freeze from spilling on the vehicle interior dur-
ing removal. If an appropriate plug cannot be found
pull back carpet and use caution when removing
unit. Keep the heater tubes elevated to prevent spill-
age of coolant.

(6) Remove one nut at expansion valve retaining both

A/C lines to expansion valve. After removing lines cap
the expansion valve openings and the A/C hose open-
ings. This will prevent any dirt or moisture from enter-
ing the refrigerant system during servicing.

CAUTION: The lubricant used in this air condition-
ing system absorbs moisture readily (similar to
brake fluid). Do not leave any portion of the system
open for extended periods of time.

(7) Remove the three retaining nuts from the

studs. These studs project through the dash panel
into the engine compartment.

(8) Remove two screws to defrost duct and remove.
(9) Remove two nuts, two screws attaching hvac

housing to dash panel.

(10) Remove four nuts retaining rear seat heat

duct and remove.

(11) Remove rear seat heat duct elbow push pin

fastener.

(12) Disconnect HVAC harness connector.
(13) Gently pull hvac unit housing rearward from

dash panel, being careful not to spill any coolant into
passenger compartment.

INSTALLATION

For installation, reverse the above procedures.

DISASSEMBLY AND ASSEMBLY

HVAC UNIT HOUSING RECONDITION

Heater-A/C unit housing must be removed from

vehicle before performing this operation. Refer to
Unit Housing Removal and Installation.

The heater a/c unit housing need not be disassem-

bled to remove the heater core. Refer to Heater Core
Removal and Installation.

DISASSEMBLE

(1) Place heater-A/C unit assembly on workbench.
(2) Pull back on retaining tabs and remove heater

core from housing.

(3) Remove recirculation door actuator wiring.

Remove actuator from recirculation housing.

(4) Remove lower distribution housing. Remove

mode door actuator.

(5) Remove blend air door actuator.
(6) Remove recirculation housing screws and clip.
(7) Remove blower motor wiring at resistor.
(8) Squeeze blower motor wiring grommet and

push grommet through blower motor cover.

(9) Remove blower motor cover.
(10) Remove screws at blower motor mounts.

Remove motor.

(11) Remove blower motor resistor.
(12) Remove wiring at evaporator temperature

probe.

(13) Using a screwdriver, pry up on tab at evapo-

rator probe. Twist probe counterclockwise and push
tab into the housing.

(14) Pull the evaporator probe needle out of the

evaporator

fins.

Remove

the

evaporator

probe

through the opening at the blower motor housing.

(15) Remove vent door seal from housing.
(16) Remove evaporator seal from housing.
(17) Remove upper housing screws and clips.
(18) Separate upper housing from lower housing.
(19) Remove evaporator assembly from lower hous-

ing.

(20) Remove blend air door from lower housing.
(21) Using a flat blade screwdriver, pinch in the

retaining tab at the base of the vent door. Pull up on
door and remove from housing.

(22) Remove mode door actuating cam.
(23) Remove screw at defrost door actuating arm.

Remove defrost door link from arm.

(24) Remove defrost door arm from lower housing.
(25) Remove link and defrost door from housing.
(26) Remove vent door actuating arm from lower

housing.

300M

HEATING AND AIR CONDITIONING

24 - 25

REMOVAL AND INSTALLATION (Continued)

ASSEMBLE

(1) Install vent door actuating arm to lower housing.
(2) Install defrost door link to defrost door.
(3) Install door and link into A/C housing.
(4) Install defrost door actuating arm and retain-

ing screw at housing.

(5) Install defrost door link to actuating arm.
(6) Line up the slots to the pegs on the mode door

cam. Install the mode door cam.

(7) Turn housing over and snap in the vent door to

the vent door arm.

(8) Install blend-air door in the housing.
(9) Install evaporator into the lower housing.
(10) Install upper housing onto lower housing.
(11) Install screws to retain the upper housing to

the lower housing.

(12) Install evaporator and vent door seals onto

the A/C housing.

(13)

Install evaporator probe assembly into the

housing. Insert probe needle into evaporator.

(14) Position the evaporator probe assembly at the

housing face. Twist assembly clockwise to lock tab
into slot on housing face.

(15) Install

wiring

at

evaporator

temperature

probe.

(16) Install blower motor resistor.
(17) Install blower motor into housing. Install

blower motor mounting screws.

(18) Thread the blower motor wiring through the

blower motor cover. Install the blower motor cover.

(19) Seat blower motor wiring grommet at blower

motor cover.

(20) Install blower motor wiring to the blower

motor resistor.

(21) Position recirculation housing to A/C housing.

Install retaining screws and clip.

(22) Install blend-air door actuator.
(23) Install mode door actuator.
(24) Install lower distribution housing.
(25) Install recirculation door actuator and wiring.
(26) Install heater core into A/C housing. Retain

core with screws.

24 - 26

HEATING AND AIR CONDITIONING

300M

DISASSEMBLY AND ASSEMBLY (Continued)