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Home >> Mercury >> 2002 >> Sable LS Premium >> Repair and Diagnosis >> Engine Mechanical >> Cooling Fan >> Engine Cooling System >> Diagnosis And Testing >> Engine Cooling >> Symptom Chart

Symptom Chart

SYMPTOM

Condition Possible Sources Action
  • Loss of engine coolant
  • Radiator.
  • Thermostat housing assembly.
  • Oil cooler.
  • Throttle body adapter heating.
  • Water pump seal.
  • Radiator hoses.
  • Heater hoses.
  • Heater core.
  • Engine gaskets.
  • Degas bottle.
  • Transmission fluid cooler.
  • The engine overheats
  • Water thermostat.
  • Airlock in the system.
  • Water pump.
  • Internal engine coolant leak.
  • Radiator.
  • Radiator airflow obstruction.
  • Cooling fan.
  • Pressure relief cap.
  • The engine does not reach normal operating temperature
  • Water 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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