Chrysler PT Cruiser Service & Repair Manual page 274

7 - 38 ENGINE - 2.0/2.4L DOHC
ENGINE - 2.0/2.4L DOHC (Continued)
CONDITION
INADEQUATE AIR CONDITIONER
PERFORMANCE (COOLING
SYSTEM SUSPECTED)
INADEQUATE HEATER
PERFORMANCE
HEAT ODOR
POSSIBLE CAUSE
1. Electric radiator fan not operating
when A/C is on.
2. Radiator and/or air conditioning
condenser is restricted, obstructed
or dirty.
3. Radiator air seals missing or
improperly installed.
4. Engine is overheating (heat may
be transferred from radiator to A/C
condenser). High underhood
temperature due to engine
overheating may also transfer heat
to A/C components.
1. Has a diagnostic trouble code
(DTC) been set?
2. Coolant level low.
3. Obstructions in heater hose
fittings at engine.
4. Heater hose kinked.
5. 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.
1. Various heat shields are used at
certain components. One or more
of these shields may be missing.
2. Is temperature gauge reading
above the normal range?
3. Is cooling fan operating
correctly?
4. Has undercoating been applied
to any unnecessary component.
5. Engine may be running rich
causing the catalytic converter to
overheat.
CORRECTION
1. Refer to appropriate Powertrain
Diagnostic Procedures manual for
operation of the DRB III scan tool.
Repair as necessary.
2. Remove restriction and/or clean
as necessary.
3. Inspect air seals. Repair as
necessary.
4. Correct overheating condition.
Refer to this section.
1. Refer to Powertrain Diagnostic
Procedures.
2. Check cooling system for leaks.
Repair as necessary.
3. Remove heater hoses at both
ends and check for obstructions.
Repair as necessary.
4. Locate kinked area and repair as
necessary.
5. (Refer to 7 - COOLING/ENGINE/
WATER PUMP - DIAGNOSIS AND
TESTING). Repair as necessary.
1. Locate missing shields and
replace or repair as necessary.
2. Refer to the previous
Temperature Gauge Reads High in
these Diagnostic Charts. Repair as
necessary.
3. Repair as necessary.
4. Clean undercoating as necessary.
5. Refer to appropriate Powertrain
Diagnostic Procedures manual for
operation of the DRB III scan tool.
Repair as necessary.
PT