Auto & Transport
Car overheating: what to do?
Car overheating: the right reflexes in a few simple steps.
Written by Mohamed IDBRAHIM · Updated octobre 13, 2026 · 8 min read
Immediate actions
- 1 Turn off the air conditioning and turn on the heater to pull heat from the engine.
- 2 Pull over as soon as it is safe and let the engine idle, not off.
- 3 Wait at least 15 minutes before opening the radiator cap.
- 4 Top up coolant only when the engine is cool.
- 5 Call a mechanic if it overheats again quickly.
What not to do / warning
Never open the radiator cap while the engine is hot — it can spray boiling coolant.
When a car overheating happens, the first minutes matter. Follow these steps to act safely and without panic.
What to do right now
- Turn off the air conditioning and turn on the heater to pull heat from the engine.
- Pull over as soon as it is safe and let the engine idle, not off.
- Wait at least 15 minutes before opening the radiator cap.
- Top up coolant only when the engine is cool.
- Call a mechanic if it overheats again quickly.
Mistakes to avoid
- Acting before removing the immediate source of danger.
- Panicking or skipping the official procedures.
- Following unverified advice from the internet.
How to prevent this in the future
Regular checks and keeping important documents and numbers in one safe place go a long way. Note the emergency number for your country and keep it visible at home.
Frequently asked questions
What should I do first?
Ensure everyone is safe, remove the source of danger, then call the relevant number or start the official procedure.
When should I call emergency services?
Whenever there is a risk to life, serious injury or a fire. When in doubt, call and let them decide.
Sources & references
- NHTSA (https://www.nhtsa.gov/)