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Home >> Ford >> 2005 >> Focus ZX3 S >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Engine Cooling System >> Diagnosis And Testing >> Engine Cooling >> Symptom Chart

Symptom Chart

SYMPTOM CHART

Condition Possible Sources Action
  • Loss of coolant
  • Hoses.
  • Hose connections.
  • Radiator.
  • Coolant pump.
  • Degas bottle.
  • Heater core.
  • Engine gaskets.
  • Engine casting cracks.
  • Engine block core plugs.
  • The engine overheats
  • Engine coolant loss.
  • Towing weight exceeded.
  • System restriction.
  • Blocked radiator grille.
  • Thermostat.
  • Fuse.
  • Circuit.
  • Fan motor.
  • Coolant pump.
  • Accessory drive belt.
  • Cylinder head temperature (CHT) sensor.
  • Powertrain control module (PCM).
  • The engine does not reach normal operating temperature
  • Thermostat.
  • The cooling fan(s) is inoperative in any speed
  • Fuse(s).
  • Circuitry.
  • Cooling fan motor.
  • Cooling fan resistor.
  • Cooling fan relay.
  • The cooling fans are on at all times
  • Fuse(s).
  • Circuitry.
  • Cooling fan relay.
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