Dodge Intrepid Service Manual page 938

LH
HEATING & AIR CONDITIONING
DESCRIPTION - ENGINE COOLING SYSTEM
REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . 1
OPERATION - ENGINE COOLING SYSTEM
REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . 1
DIAGNOSIS AND TESTING
DIAGNOSIS AND TESTING - A/C
PERFORMANCE TEST . . . . . . . . . . . . . . . . . . 1
DIAGNOSIS AND TESTING - HEATER
PERFORMANCE TEST . . . . . . . . . . . . . . . . . . 2
DIAGNOSIS AND TESTING - SELF
DIAGNOSTICS. . . . . . . . . . . . . . . . . . . . . . . . . 3
HEATING & AIR
CONDITIONING
DESCRIPTION - ENGINE COOLING SYSTEM
REQUIREMENTS
To maintain the performance level of the HVAC
system, the engine cooling system must be properly
maintained. Refer to Cooling for more information-
(Refer to 7 - COOLING - OPERATION).
The use of a bug screen is not recommended. Any
obstructions in front of the radiator or condenser can
reduce the performance of the A/C and/or engine cool-
ing system.
WARNING:
DO NOT OPEN COOLING SYSTEM WHEN HOT AS
PERSONAL INJURY OR DAMAGE TO VEHICLE MAY
RESULT.
OPERATION - ENGINE COOLING SYSTEM
REQUIREMENTS
The engine cooling system is designed to develop
internal pressure of 97 to 123 kPa (14 to 18 psi).
Wait 15 minutes (after the engine is shut off), or
until safe temperature and pressure is attained,
before opening the cooling system. Refer to Coolin-
g(Refer to 7 - COOLING - OPERATION). Coolant
temperature can be checked using the scan tool
(DRBIII ).
When additional coolant is needed, it should be
added to the coolant pressure bottle. Use only 50/50
mix of Mopar Antifreeze/Coolant, 5 Year/100,000
Mile Formula (orange in color), or the equivalent and
HEATING & AIR CONDITIONING
TABLE OF CONTENTS
page
HEATING & AIR CONDITIONING 24 - 1
DIAGNOSIS AND TESTING - ERRATIC
OPERATION OF HVAC SYSTEM . . . . . . . . . . . 6
STANDARD PROCEDURE - HVAC SYSTEM
CALIBRATION . . . . . . . . . . . . . . . . . . . . . . . . . 6
SPECIFICATIONS
A/C APPLICATION TABLE-ATC
A/C APPLICATION TABLE-MTC
TORQUE SPECIFICATIONS
CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
DISTRIBUTION . . . . . . . . . . . . . . . . . . . . . . . . . . 23
PLUMBING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
distilled water. This coolant must not be mixed with
other (green in color) coolants. If this occurs, a reduc-
tion in the extended service interval will result. Refer
to Lubrication and Maintenance for service sched-
ules(Refer to LUBRICATION & MAINTENANCE -
SPECIFICATIONS).
CAUTION:
Do not add additional inhibitors, anti-rust products,
or soluble oil (sold as "water pump lubricants").
These products may not be compatible with the
engine coolant.
Refer to Cooling for cooling system procedures(Re-
fer to 7 - COOLING - STANDARD PROCEDURE).
DIAGNOSIS AND TESTING
DIAGNOSIS AND TESTING - A/C
PERFORMANCE TEST
The air conditioning system is designed to remove
heat and humidity from the air entering the passen-
ger compartment. The evaporator, located in the
HVAC unit, is cooled to temperatures near the freez-
ing point. As warm damp air passes over the fins in
the evaporator, moisture in the air condenses to
water, dehumidifying the air. High humidity reduces
the evaporator's ability to cool the air. During periods
of high heat and humidity, an air conditioning sys-
tem will be less effective. With the a/c heater control
set to RECIRC, only air from the passenger compart-
ment passes through the evaporator. As the passen-
ger compartment air dehumidifies, A/C performance
levels rise.
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