Cooling system (Peugeot Partner I)

Overheat

• Lack of coolant in the system ("Weekly checks"),
• Thermostat is faulty (stuck in closed position) (chapter 3).
• Blockage of the radiator core or clogging of the radiator grille (chapter 3).
• The electric fan or sensor is faulty (chapter 3).
• Sealed lid malfunction (chapter 3).
• The coolant temperature sensor/gauge is faulty (Chapter 3).
• Air lock in the cooling system (chapter 3).
• The engine management system is faulty (chapter 4).

Hypothermia

• Thermostat is faulty (stuck open) (chapter 3).
• Coolant temperature sensor/gauge is faulty (chapter 3).

External coolant leak

• The hoses or clamps are damaged (chapter 1).
• Leak from radiator core or heater core (chapter 3).
• Sealed lid malfunction (chapter 3).
• Coolant pump leak (chapter 3).
• Boiling of liquid due to overheating (chapter 3).
• Leakage through process plugs (chapter 2).

Internal coolant leak

• Cylinder head gasket leak (chapter 2).
• Crack in the cylinder head or in the cylinder block (chapter 2).

Corrosion

• The fluid is not changed and the system is flushed often enough (chapter 1).
• Incorrect ratio of coolant components or incorrectly selected coolant brand (chapter 1).