- Insufficient refrigerant level in the system ("Weekly checks").
- Faulty thermostat (Section 2).
- clogged radiator (Section 2).
- Faulty electrical cooling fan or thermal switch
- Defective pressure cap on radiator (Section 2).
- Inaccurate temperature sensor (Section 2).
- Air lock in the cooling system.
hypothermia
External refrigerant leak
- Degraded or damaged hoses or hose clamps.
- Damaged radiator or heater (Section 2).
- Defective pressure cap (Section 2).
- Water pump insulation broken (Section 2).
- Boiling due to overheating (Section 2).
- Leakage from under the plug (Section 1).
Internal refrigerant leak
- Leakage through the cylinder head gasket (Section 1).
- Split cylinder head or cylinder bore (Section 1).
Corrosion
- Irregular draining of fluid and flushing of the system.
- Wrong refrigerant mixture or wrong type of refrigerant.
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