Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Dodge Durango 1998-2000 Approved Dodge Durango 1998-99 98DN_24
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DN HEATING AND AIR CONDITIONING 24 - 1
HEATING AND AIR CONDITIONING
CONTENTS
page page
GENERAL INFORMATION EXPANSION VALVE . . . . . . . . . . . . . . . . . . . . . . 24
HEATER AND AIR CONDITIONER . . . . . . . . . . . . 2 HEATER PERFORMANCE . . . . . . . . . . . . . . . . . 16
HEATER AND AIR CONDITIONER CONTROL . . . 3 HEATER-A/C CONTROL . . . . . . . . . . . . . . . . . . 17
REAR OVERHEAD AIR CONDITIONER . . . . . . . . 2 HIGH PRESSURE CUT-OFF SWITCH . . . . . . . . 25
SERVICE WARNINGS AND PRECAUTIONS . . . . 3 HIGH SPEED BLOWER MOTOR RELAY . . . . . . 25
DESCRIPTION AND OPERATION LOW PRESSURE CUT-OFF SWITCH . . . . . . . . . 26
BLOWER MOTOR . . . . . . . . . . . . . . . . . . . . . . . . 5 REFRIGERANT SYSTEM LEAKS . . . . . . . . . . . . 27
BLOWER MOTOR RELAY . . . . . . . . . . . . . . . . . . 5 VACUUM SYSTEM . . . . . . . . . . . . . . . . . . . . . . 18
BLOWER MOTOR RESISTOR . . . . . . . . . . . . . . . 6 SERVICE PROCEDURES
BLOWER MOTOR SWITCH . . . . . . . . . . . . . . . . . 6 REFRIGERANT OIL LEVEL . . . . . . . . . . . . . . . . 28
COMPRESSOR . . . . . . . . . . . . . . . . . . . . . . . . . . 6 REFRIGERANT RECOVERY . . . . . . . . . . . . . . . . 27
COMPRESSOR CLUTCH . . . . . . . . . . . . . . . . . . . 7 REFRIGERANT SYSTEM CHARGE . . . . . . . . . . 28
COMPRESSOR CLUTCH RELAY . . . . . . . . . . . . . 7 REFRIGERANT SYSTEM EVACUATE . . . . . . . . . 27
CONDENSER . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 REMOVAL AND INSTALLATION
ELECTRONIC CYCLING CLUTCH SWITCH . . . . . 7 B-PILLAR REFRIGERANT LINE . . . . . . . . . . . . 43
EVAPORATOR COIL . . . . . . . . . . . . . . . . . . . . . . 8 BLOWER MOTOR . . . . . . . . . . . . . . . . . . . . . . . 57
EXPANSION VALVE . . . . . . . . . . . . . . . . . . . . . . . 8 BLOWER MOTOR RELAY . . . . . . . . . . . . . . . . . 47
FILTER-DRIER . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 BLOWER MOTOR RESISTOR . . . . . . . . . . . . . . 48
HEATER CORE . . . . . . . . . . . . . . . . . . . . . . . . . . 9 COMPRESSOR . . . . . . . . . . . . . . . . . . . . . . . . . 31
HIGH PRESSURE CUT-OFF SWITCH . . . . . . . . . 9 COMPRESSOR CLUTCH . . . . . . . . . . . . . . . . . . 32
HIGH PRESSURE RELIEF VALVE . . . . . . . . . . . . 9 COMPRESSOR CLUTCH RELAY . . . . . . . . . . . . 35
HIGH SPEED BLOWER MOTOR RELAY . . . . . . . 9 CONDENSER . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
LOW PRESSURE CUT-OFF SWITCH . . . . . . . . . 10 DUCTS AND OUTLETS . . . . . . . . . . . . . . . . . . . 63
REFRIGERANT . . . . . . . . . . . . . . . . . . . . . . . . . 10 ELECTRONIC CYCLING CLUTCH SWITCH . . . . 36
REFRIGERANT LINE . . . . . . . . . . . . . . . . . . . . . 10 EVAPORATOR COIL . . . . . . . . . . . . . . . . . . . . . 61
REFRIGERANT LINE COUPLER . . . . . . . . . . . . 10 EXPANSION VALVE . . . . . . . . . . . . . . . . . . . . . . 38
REFRIGERANT OIL . . . . . . . . . . . . . . . . . . . . . . 11 FILTER-DRIER . . . . . . . . . . . . . . . . . . . . . . . . . . 40
REFRIGERANT SYSTEM SERVICE HEATER CORE . . . . . . . . . . . . . . . . . . . . . . . . . 60
EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . 11 HEATER-A/C CONTROL . . . . . . . . . . . . . . . . . . 46
REFRIGERANT SYSTEM SERVICE PORT . . . . . 12 HEATER-A/C HOUSING . . . . . . . . . . . . . . . . . . . 52
VACUUM CHECK VALVE . . . . . . . . . . . . . . . . . . 12 HEATER-A/C HOUSING DOOR . . . . . . . . . . . . . 59
VACUUM RESERVOIR . . . . . . . . . . . . . . . . . . . 12 HIGH PRESSURE CUT-OFF SWITCH . . . . . . . . 29
DIAGNOSIS AND TESTING HIGH SPEED BLOWER MOTOR RELAY . . . . . . 47
A/C PERFORMANCE . . . . . . . . . . . . . . . . . . . . . 12 LIQUID LINE . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
BLOWER MOTOR . . . . . . . . . . . . . . . . . . . . . . . 19 LOW PRESSURE CUT-OFF SWITCH . . . . . . . . . 35
BLOWER MOTOR RELAY . . . . . . . . . . . . . . . . . 21 MODE DOOR VACUUM ACTUATOR . . . . . . . . . 51
BLOWER MOTOR RESISTOR . . . . . . . . . . . . . . 21 REAR BLOWER MOTOR SWITCH . . . . . . . . . . 47
BLOWER MOTOR SWITCH . . . . . . . . . . . . . . . . 22 REAR OVERHEAD A/C UNIT . . . . . . . . . . . . . . . 56
COMPRESSOR . . . . . . . . . . . . . . . . . . . . . . . . . 22 REFRIGERANT LINE COUPLER . . . . . . . . . . . . 29
COMPRESSOR CLUTCH COIL . . . . . . . . . . . . . 23 SUCTION AND DISCHARGE LINE . . . . . . . . . . 30
COMPRESSOR CLUTCH RELAY . . . . . . . . . . . . 23 SUCTION LINE JUMPER . . . . . . . . . . . . . . . . . 38
ELECTRONIC CYCLING CLUTCH SWITCH TEMPERATURE CONTROL CABLE . . . . . . . . . . 50
(Front Unit Only) . . . . . . . . . . . . . . . . . . . . . . 24 UNDERBODY REFRIGERANT LINE . . . . . . . . . . 41
24 - 2 HEATING AND AIR CONDITIONING DN
VACUUM CHECK VALVE . . . . . . . . . . . . . . . . . . 44 ADJUSTMENTS
VACUUM RESERVOIR . . . . . . . . . . . . . . . . . . . 45 TEMPERATURE CONTROL CABLE . . . . . . . . . . 67
GENERAL INFORMATION from the evaporator that is allowed to flow through,
or around, the heater core. A temperature control
HEATER AND AIR CONDITIONER knob on the heater-A/C control panel determines the
All vehicles are equipped with a common heater- discharge air temperature by moving a cable, which
A/C housing assembly (Fig. 1). The system combines operates the blend-air door. This allows an almost
air conditioning, heating, and ventilating capabilities immediate manual control of the output air tempera-
in a single unit housing mounted under the instru- ture of the system.
ment panel. The mode control knob on the heater-A/C control
panel is used to direct the conditioned air to the
selected system outlets. The mode control switch uses
engine vacuum to control the mode doors, which are
operated by vacuum actuator motors.
The outside air intake can be shut off by selecting
the recirculation mode (Max A/C) with the mode con-
trol knob. This will operate a vacuum actuated recir-
culating air door that closes off the outside fresh air
intake and recirculates the air that is already inside
the vehicle.
A large central duct delivers conditioned air from
the front heater-A/C housing to the second and third
seat floor panel foot wells. A damper door in this duct
can be adjusted by the second seat passengers with a
manual control located on a mini-console just behind
the split bench seat center cushion, or located on the
Fig. 1 Common Blend-Air Heater-Air Conditioner upper rear surface of the floor console on models with
System - Typical the optional bucket seats. The split bench seat con-
trol has two positions: On or Off. The bucket seat
Outside fresh air enters the vehicle through the control has three positions: On, Off and a third posi-
cowl top opening at the base of the windshield, and tion that directs air flow through a pair of adjustable
passes through a plenum chamber to the heater-A/C barrel outlets mounted high on the rear surface of
system blower housing. Air flow velocity can then be the floor console.
adjusted with the blower motor speed selector switch The air conditioner for all models is designed for
on the heater-A/C control panel. The air intake open- the use of non-CFC, R-134a refrigerant. The air con-
ings must be kept free of snow, ice, leaves, and other ditioning system has an evaporator to cool and dehu-
obstructions for the heater-A/C system to receive a midify the incoming air prior to blending it with the
sufficient volume of outside air. heated air. This air conditioning system uses a ther-
It is also important to keep the air intake openings mal expansion valve between the condenser and the
clear of debris because leaf particles and other debris evaporator coil to meter refrigerant flow to the evap-
that is small enough to pass through the cowl ple- orator coil. To maintain minimum evaporator temper-
num screen can accumulate within the heater-A/C ature and prevent evaporator freezing, an electronic
housing. The closed, warm, damp and dark environ- cycling clutch switch on the expansion valve cycles
ment created within the heater-A/C housing is ideal the compressor clutch.
for the growth of certain molds, mildews and other
fungi. Any accumulation of decaying plant matter REAR OVERHEAD AIR CONDITIONER
provides an additional food source for fungal spores, A rear overhead air conditioning unit is an avail-
which enter the housing with the fresh air. Excess able option to supplement the output of the front air
debris, as well as objectionable odors created by conditioner, for increased rear seat passenger com-
decaying plant matter and growing fungi can be dis- fort. This unit includes a roof-mounted evaporator
charged into the passenger compartment during coil and a blower motor with a wide squirrel-cage
heater-A/C system operation. type blower wheel. A four position (three speeds plus
The heater and air conditioner are blend-air type off) rear blower motor switch is mounted in the head-
systems. In a blend-air system, a blend-air door con- liner behind the right front seat position, where it is
trols the amount of unconditioned air or cooled air accessible to both the driver and the second seat pas-
sengers.
DN HEATING AND AIR CONDITIONING 24 - 3
GENERAL INFORMATION (Continued)
The wide and shallow rear unit is positioned PERSONAL INJURY MAY RESULT FROM IMPROPER
between the front and second seats to provide ample SERVICE PROCEDURES. REPAIRS SHOULD ONLY
headroom for all vehicle occupants. The headliner is BE PERFORMED BY QUALIFIED SERVICE PERSON-
molded to cover the unit and includes an integral air NEL.
intake grille toward the front of the unit, and an ◦ Jabse Service Manual Search 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo