Jeep 1979 CJ-5 Technical & Service Manual page 837

3E-26 AIR CONDITIONING
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 r e m a i n i n g c o m p o n e n t s are in the e n g i n e
compartment.
The compressor is a two-cylinder, belt-driven pump.
An electromagnetic clutch couples the compressor 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, including the air condi-
tioner, to reduce battery load and provide easier
starting.
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 new temperature control thermo-
stat, insert the capillary tube into the evaporator coil a
minimum of two inches (fig. 3E-21).
EVAPORATOR I N S U L A T I O N
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 or PC position. This permits the evapo-
rator to precool in hot weather.
CAUTION: Do not leave fan control on PC for longer
than SO seconds. Move the fan control to HI position and
raise all windows.
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 air throughout the
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.
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C A P I L L A R Y
TUBE - INSERT
= INTO COIL M I N .
2 INCHES
4 1 0 9 4
Fig. 3 E - 2 1 Capillary Tube Position
CAUTION: Handle the tube with care to avoid bends
or kinks which could cause the thermostat to
malfunction.
CONDENSER AND RECEIVER/DRIER ASSEiDLf
Removal
(1) Discharge refrigerant from system.
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) Remove condenser 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 receiv-
er/dryer-to-evaporator hose at receiver/dryer.