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VA
HEATING & AIR CONDITIONING
DESCRIPTION
DESCRIPTION - COOLING SYSTEM
REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . 1
DESCRIPTION - HEATER AND AIR
CONDITIONER . . . . . . . . . . . . . . . . . . . . . . . . 1
OPERATION - HEATER AND AIR
CONDITIONER
. . . . . . . . . . . . . . . . . . . . . . . . 2
DIAGNOSIS AND TESTING
DIAGNOSIS AND TESTING - FUNCTION
TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
DIAGNOSIS AND TESTING - A/C
PERFORMANCE TEST . . . . . . . . . . . . . . . . . . 3
HEATING & AIR
CONDITIONING
DESCRIPTION
DESCRIPTION - COOLING SYSTEM
REQUIREMENTS
To maintain the performance level of the heating-
air conditioning system, the engine cooling system
must be properly maintained. The use of a bug
screen is not recommended. Any obstructions in front
of the radiator or condenser will reduce the perfor-
mance of the air conditioning and engine cooling sys-
tems.
The engine cooling system includes the radiator,
thermostat, heater core, heater hoses and the engine
coolant pump. Refer to Cooling for more information
before opening or attempting any service to the
engine cooling system.
DESCRIPTION - HEATER AND AIR
CONDITIONER
A automatic temperature control (ATC) single zone
type heating-air conditioning system is standard
equipment on this model. A manually controlled rear
air conditioning system is available as a factory-in-
stalled option.
All vehicles are equipped with a common ventila-
tion housing (Fig. 1) located in the engine compart-
ment which includes:
• blower motor
• blower motor resistor block
HEATING & AIR CONDITIONING
TABLE OF CONTENTS
page
HEATING & AIR CONDITIONING 24 - 1
DIAGNOSIS AND TESTING - HEATER
PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . 4
SPECIFICATIONS
A/C SYSTEM
. . . . . . . . . . . . . . . . . . . . . . . . . . 5
CONTROLS - FRONT
. . . . . . . . . . . . . . . . . . . . . . 8
CONTROLS - REAR
. . . . . . . . . . . . . . . . . . . . . . 22
DISTRIBUTION - FRONT
DISTRIBUTION - REAR
PLUMBING
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
CABIN HEATER
. . . . . . . . . . . . . . . . . . . . . . . . . 72
• recirculation door and actuator
Fig. 1 Ventilation Housing
1 - NUT (5)
2 - WASHER (5)
3 - VENTILATION HOUSING
4 - HOUSING COVER
All vehicles are also equipped with a common
heater housing mounted under the instrument panel
which includes:
• heater core
• evaporator core
• evaporator temperature sensor
page
. . . . . . . . . . . . . . . . . . . 31
. . . . . . . . . . . . . . . . . . . . 39
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