Chrysler 300M Service Manual page 192

LH
COOLING (Continued)
CONDITION
INADEQUATE AIR
CONDITIONER
PERFORMANCE (COOLING
SYSTEM SUSPECTED).
INADEQUATE HEATER
PERFORMANCE.
HEAT ODOR
POSSIBLE CAUSES
1. Radiator and/or A/C condenser is
restricted, obstructed or dirty
(insects, leaves, etc.).
2. Electrical radiator fan not
operating when A/C is operated.
3. Engine is overheating (heat may
be transferred from radiator to A/C
condenser. High underhood
temperatures due to engine
overheating may also transfer heat
to A/C components.
4. All models are equipped with air
seals at the radiator and/or A/C
condenser. If these seals are
missing or damaged, not enough
air flow will be pulled through the
radiator and A/C condenser.
1. Has a diagnostic trouble code
(DTC) been set?
2. Low Coolant level.
3. Air Trapped in heater core.
4. Obstructions in heater hose
fitting at engine or at heater core.
5. Heater hose kinked or
obstructed.
6. Thermostat possibly stuck open.
7. Water pump is not pumping
coolant to heater core. When the
engine is fully warmed up, both
heater hoses should be hot to the
touch. If only one of the hoses is
hot, the water pump may not be
operating correctly.
1. Various heat shields are used at
certain driveline components. One
or more of these shields may be
missing.
2. Is the temperature gauge reading
above the normal range?
COOLING 7 - 5
CORRECTION
1. Remove restriction and/or clean as
necessary.
2. (Refer to Appropriate Diagnostic
Information) Repair as necessary.
3. Correct overheating condition.
4. Check for missing or damaged air
seals and repair as necessary.
1. (Refer to Appropriate Diagnostic
Information) Repair as necessary.
2. (Refer to 7 - COOLING -
DIAGNOSIS AND TESTING) Repair as
necessary.
3. Improper coolant fill procedure.
(Refer to 7 - COOLING - STANDARD
PROCEDURE)
4. Remove heater hoses at both ends
and check for obstructions. Repair as
necessary.
5. Locate kinked or obstructed area.
Repair as necessary.
6. (Refer to 7 - COOLING/ENGINE/
ENGINE COOLANT THERMOSTAT -
DIAGNOSIS AND TESTING)
7. (Refer to 7 - COOLING/ENGINE/
WATER PUMP - DIAGNOSIS AND
TESTING)
1. Locate missing shields and replace
or repair as necessary.
2. Refer to Temperature Gauge Reads
High in these Diagnosis Charts.