Symptom Chart
WARNING: This page is about a different car, the 2004 Mercury Monterey and 2004 Ford Freestar. 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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- Radiator.
- Thermostat housing assembly.
- Coolant pump seal.
- Radiator hoses.
- Heater hoses.
- Heater core.
- Engine gaskets.
- Degas bottle and hoses.
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- Thermostat.
- Low coolant fill.
- Airlock in the system.
- Coolant pump.
- Internal engine coolant leak.
- Radiator.
- Radiator airflow obstruction.
- Cooling fan.
- Cooling fan wiring.
- Pressure relief cap.
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- The engine does not reach normal operating temperature
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- Thermostat.
- Low coolant fill.
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- The block heater does not operate correctly
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- Block heater power cable.
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- DISCONNECT the power cable from the heater.
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- CHECK the resistance in all three power cable circuits. If the resistance is greater than 5 ohms in any circuit, INSTALL a new power cable. If the resistance is less than 5 ohms in all three circuits, INSTALL a new block heater.
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- Noisy cooling fan operation
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- Foreign particle contamination.
- Fan motor.
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NOTE:
Make sure key is in the OFF position and the cooling fan has stopped rotating before servicing.
- REMOVE the contaminants from the cooling fan and shroud. CHECK for normal operation. If still noisy, INSTALL a new cooling fan assembly.
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- The electric cooling fan(s) is inoperative in one or more speeds
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- Fuses.
- Circuitry.
- Cooling fan motor.
- Relay.
- Cooling fan resistor.
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- The electric cooling fan(s) stays on all the time
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- The electric cooling fan(s) incorrect operation
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