Symptom Chart
WARNING: This page is about a different car, the 2010 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
Symptom Chart
| Condition |
Possible Sources |
Action |
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- Coolant hoses or tubes
- Hose clamps
- Coolant pump O-ring seal or gasket
- Thermostat O-ring seal or gasket
- Thermostat housing
- Radiator
- Transmission fluid cooler (in radiator) (if equipped) (may leak internally or externally)
- Degas bottle (if equipped)
- Coolant expansion tank (if equipped)
- Pressure relief cap
- Coolant pump leaking from weep hole
- Auxiliary coolant pump (if equipped)
- Heater core
- Heater control valve (if equipped)
- Coolant crossover manifold assembly (if equipped)
- Engine gaskets (may leak internally or externally)
- Oil cooler (if equipped) (may leak internally or externally)
- Heated throttle body (TB) or heated TB adapter (if equipped)
- Heated PCV (if equipped)
- Fuel pressure regulator coolant bowl (if equipped, natural gas engine)
- Cylinder block core plugs (if equipped)
- Cylinder head core plugs (if equipped)
- Block heater (if equipped)
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- Low coolant level
- External engine coolant leak
- Airlock in system
- Pressure relief cap installation
- Restricted airflow through the A/C condenser/radiator
- Internal engine coolant leak
- Coolant condition/concentration
- Accessory drive components
- Non-OEM engine enhancement components
- Electric cooling fan (if equipped)
- Mechanical cooling fan (if equipped)
- Mechanical cooling fan clutch (if equipped)
- Radiator
- Thermostat
- Engine coolant temperature (ECT) indicator system (gauge)
- ECT sensor (if equipped)
- Cylinder head temperature (CHT) sensor (if equipped)
- Heater core
- Coolant pump
- Coolant flow restriction
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- The engine does not reach normal operating temperature
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- Low coolant level
- Thermostat
- Mechanical fan clutch always engaged
- Electric cooling fan always on
- Engine coolant temperature indicator system (gauge)
- ECT sensor (if equipped)
- CHT sensor (if equipped)
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- The block heater does not operate correctly
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- CHECK continuity in all 3 power cable circuits. If any circuit measures greater than 5 ohms, INSTALL a new power cable.
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- CHECK the resistance of the block heater. If the resistance does not measure between 12.5 and 17 ohms, INSTALL a new block heater.
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- The electric cooling fan(s) or electronically controlled fan clutch is inoperative in one or more speeds or does not operate correctly (if equipped)
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- Wiring
- Relays
- Fuses
- Fan control module
- Cooling fan motor(s)
- Cooling fan resistor(s)
- Electric fan clutch
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- The electric cooling fan(s) stay(s) on all the time (if equipped)
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- Noisy electric cooling fan operation (if equipped)
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- Foreign material contamination
- Fan motor
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- REMOVE the foreign material from the cooling fan and shroud. TEST the system for normal operation. If still noisy, INSTALL a new cooling fan assembly.
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- Fan blade detached from fan motor
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- INSTALL a new cooling fan assembly.
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- Noisy mechanical fan operation (if equipped)
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- CARRY OUT the Fan Clutch Test - Minimum Speed Requirement under Component Tests .
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