What it can mean
Overheating can escalate rapidly and opening a hot cooling system is hazardous.
What to do next
- Turn off air conditioning and stop safely.
- Switch off the engine if the temperature stays high or steam appears.
- Let the system cool completely before inspection.
Possible causes to test
- Coolant leak
- Cooling fan fault
- Thermostat or water pump
- Restricted radiator or airflow