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Symptom Chart

WARNING: This page is about a different car, the 2005 Mercury Sable and 2005 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.
PROBLEM SYMPTOM CHART

Condition Possible Sources Action
  • Loss of engine coolant
  • Radiator.
  • Thermostat housing assembly.
  • Oil cooler.
  • Throttle body adapter heating.
  • Coolant pump seal.
  • Radiator hoses.
  • Heater hoses.
  • Heater core.
  • Engine gaskets.
  • Degas bottle.
  • Transmission fluid cooler.
  • The engine overheats
  • Low coolant level.
  • Thermostat.
  • Airlock in the system.
  • Coolant pump.
  • Internal engine coolant leak.
  • Radiator.
  • Radiator airflow obstruction.
  • Cooling fan.
  • Pressure relief cap.
  • The engine does not reach normal operating temperature
  • Thermostat.
  • The block heater does not operate correctly
  • Block heater power cable.
  • CHECK continuity in all three power cable circuits. If any circuit measures greater than 5 ohms, INSTALL a new power cable.
  • Block heater.
  • INSTALL a new block heater.
  • The cooling fans are inoperative
  • Circuitry.
  • Relay(s).
  • Cooling fan motor(s).
  • The cooling fans stay on all the time
  • Circuitry.
  • Fan braking relay.
  • A/C dual function pressure switch.
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