Air Conditioning; Control Operation; Control Panel - Jeep J-10 Series 1982 Technical & Service Manual

3E-2 AIR CONDITIONING
occur, simply turn the TEMP knob to OFF and allow the
blower to operate for a few minutes to allow the cooling
coil to defrost. Then turn the TEMP knob to a setting
which is not as cold as the setting at which frosting
occurred.
To maintain maximum cooling efficiency, periodically
remove bugs and foreign matter from the condenser and
radiator fins. DO NOT install a bug screen or other
screen material in front of the condenser and radiator.
Water forming under a vehicle, at a point below the
cooling case, is condensation water draining from the
system and is considered normal.
The engine temperature gauge pointer will indicate a
slightly higher than normal temperature when the air
conditioning system is operating. However, should ex
cessive overheating occur, check the condition of all wa
ter hoses, check the radiator for rust or scaling
conditions, and make sure that the condenser is free of
bugs or other foreign matter.
The air conditioner also can be used for fast, efficient
defogging of windows during cool, damp weather.
The condenser is mounted ahead of the radiator and
the remaining components are in the engine
compartment.
The compressor is a rotary, five-cylinder, belt-driven
pump. An electromagnetic clutch couples the com
pressor to the drive pulley. The drive pulley freewheels
when the air conditioner is not in use.
The START position on the ignition switch automat
ically disconnects all accessories, includingthe air condi
tioner, to reduce battery load and provide easier
starting.
CONTROL OPERATION
For fast, maximum efficiency, purge the vehicle of hot
air by driving the equivalent of two or three city blocks
with at least one window open. During this time, place
the TEMP control in the MAX position and the FAN
control in the HI position. This permits the evaporator
to precool in hot weather.
Adjust the air outlets to obtain desired airflow distri
bution by moving the louver levers left, right, up, or
down. 'Airflow can be adjusted for quick delivery to a
specific spot or for gentle diffusion of airthroughoutthe
vehicle.
When the interior of the vehicle has cooled to the
desired temperature, the FAN knob may be set to obtain
the desired volume of air from the air outlets. The
TEMP knob may be rotated to vary the temperature. It
may be necessary to experiment with the TEMP knob to
determine the settings best suited to various driving
conditions. Generally, an intermediate temperature and
high fan setting is comfortable for city driving, and a
lesser fan setting comfortable for open road driving.
Run the engine well above idle speed for more ef
ficient cooling under conditions in which the system is
operated with the vehicle standing.
CONTROL PANEL
Fan Switch
The fan switch may be serviced by removing the ac
cess plate located on the lower evaporator core housing
below the control panel.
TEMPERATURE CONTROL THERMOSTAT
To service the temperature control thermostat, the
evaporator core housing must be disassembled.
When installing a replacement temperature control
thermostat, insert the capillary tube into the evaporator
coil a minimum of two inches (fig. 3E-2).
CAUTION: Handle the tube with care to avoid bends
or kinks which could cause the thermostat to
malfunction.
UPPER
CASE
w
EVAPORATOR
COIL ASSY
®
INSULATION
CAPILLARY
TUBE • INSERT
= INTO COIL MIN.
• 2 INCHES
41094
Rg. 3E-2 Capillary Tube Position
CONDENSER
Removal
(1) Discharge refrigerant from system as described
in General Information and Refrigerant Handling sec
tion of this chapter.
NOTE: Discharge system slowly to prevent loss of
compressor oil.
(2) Drain radiator.
(3) Remove fan shroud and radiator.
(4) Disconnect pressure line at condenser.
(5) Removecondenser attaching screws and tilt bot
tom of condenser toward engine.
NOTE: Plug all open connections to prevent entry of
dirt and moisture.
(6) From underside of vehicle, disconnect receiver/
dryer-to-evaporator hose at receiver/dryer.
(7) Remove condenser and receiver/dryer as
sembly.
(8) Remove receiver/dryer from condenser, if
necessary.