Chrysler Vehicle User Manual page 1566

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HEATING & AIR CONDITIONING
DESCRIPTION
DESCRIPTION - HEATER AND AIR
CONDITIONER . . . . . . . . . . . . . . . . . . . . . . . . 1
DESCRIPTION - REFRIGERANT SYSTEM
SERVICE PORT . . . . . . . . . . . . . . . . . . . . . . . . 2
OPERATION
OPERATION - HEATER AND AIR
CONDITIONER . . . . . . . . . . . . . . . . . . . . . . . . 2
OPERATION - REFRIGERANT SYSTEM
SERVICE PORT . . . . . . . . . . . . . . . . . . . . . . . . 2
WARNING
SERVICE WARNINGS AND PRECAUTIONS
CAUTION
SERVICE CAUTIONS
HEATING & AIR
CONDITIONING
DESCRIPTION
DESCRIPTION - HEATER AND AIR
CONDITIONER
All vehicles are equipped with a common heater-
A/C housing assembly (Fig. 1). The system combines
air conditioning, heating, and ventilating capabilities
in a single unit housing mounted under the instru-
ment panel. On heater-only systems, the evaporator
coil and recirculating air door are omitted from the
housing.
Outside fresh air enters the vehicle through the
cowl top opening at the base of the windshield, and
passes through a plenum chamber to the heater-A/C
system blower housing. Air flow velocity can then be
adjusted with the blower motor speed selector switch
on the heater-A/C control panel. The air intake open-
ings must be kept free of snow, ice, leaves, and other
obstructions for the heater-A/C system to receive a
sufficient volume of outside air.
It is also important to keep the air intake openings
clear of debris because leaf particles and other debris
that is small enough to pass through the cowl ple-
num screen can accumulate within the heater-A/C
HEATING & AIR CONDITIONING
TABLE OF CONTENTS
page
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HEATING & AIR CONDITIONING
DIAGNOSIS AND TESTING
DIAGNOSIS AND TESTING - HEATER
PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . 5
DIAGNOSIS AND TESTING - A/C
PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . 5
STANDARD PROCEDURE
STANDARD PROCEDURE - DIODE
REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . 9
STANDARD PROCEDURE - REFRIGERANT
SYSTEM SERVICE EQUIPMENT . . . . . . . . . . . 9
SPECIFICATIONS
A/C APPLICATION TABLE
CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
DISTRIBUTION . . . . . . . . . . . . . . . . . . . . . . . . . . 32
PLUMBING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Fig. 1 Common Blend-Air Heater-Air Conditioner
System - Typical
1 - HEATER CORE
2 - BLEND-AIR DOOR
3 - EVAPORATOR A/C ONLY
4 - RECIRCULATING AIR DOOR A/C ONLY
5 - FLOOR/PANEL DOOR
6 - FLOOR/DEFROST DOOR
housing. The closed, warm, damp and dark environ-
ment created within the heater-A/C housing is ideal
for the growth of certain molds, mildews and other
fungi. Any accumulation of decaying plant matter
provides an additional food source for fungal spores,
which enter the housing with the fresh air. Excess
debris, as well as objectionable odors created by
decaying plant matter and growing fungi can be dis-
charged into the passenger compartment during
heater-A/C system operation.
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