The engine temperature warning light is part of your car’s cooling system. It is connected to sensors that track the engine's temperature while you drive. The light turns red or amber if the engine gets too hot, and it turns a blue light on if the engine is too cold, especially on chilly mornings. These lights serve as early warning signals, helping you take action before the engine is damaged. The engine could overheat and you won’t know without this warning light system, leading to expensive repairs.
Common reasons the engine temperature warning light comes on
There are a few common reasons why the engine temperature warning light may turn on. Some of these issues are simple to fix, while others may require a visit to the workshop. Let us take a look:
- Low coolant levels: The system cannot regulate heat properly if your car’s coolant is running low due to a leak, a damaged hose or a worn-out water pump.
- Faulty thermostat: The engine may overheat if the thermostat is stuck in the closed position, as the coolant cannot circulate freely.
- Radiator fan malfunction: The engine can heat up quickly without proper airflow from the fan, especially when the car is stuck in traffic or driving in hot weather.
- Water pump issues: The coolant will not flow evenly if the water pump is not working well. This creates hotspots inside the engine.
- Blocked radiator: A radiator clogged with rust, dirt or debris cannot cool the engine efficiently because the flow of coolant is restricted.
What to do when the engine temperature warning light turns on
It depends on the colour of the warning light. A red light means the engine is overheating. Pull over safely, turn off the engine and let it cool for at least 30 minutes. If the light stays on, call roadside assistance.
A yellow or amber light usually points to low coolant. You can stop the car, check the coolant and top it up if needed. Remember, never open the coolant reservoir when the engine is still hot. The pressure can cause serious burns.
A blue light means the engine is still cold, which is normal in winter. Drive gently until it turns off. If it stays on too long, there could be a coolant issue.
Driving with the engine temperature warning light on – is it safe?
It is generally not safe to drive when the engine temperature warning light is on. A red light means the engine is overheating; you should stop driving immediately to prevent serious damage. A blue light is not a concern if it disappears quickly. However, it could indicate an underlying issue that requires attention if it persists. A yellow or amber light may allow limited driving, just enough to reach the nearest garage. In this case, you should check and top up the coolant as soon as possible. Ignoring these warnings might save time in the moment, but it can lead to engine failure and be costly.
How to fix engine temperature warning light
Fixing the engine temperature warning light depends on what caused it in the first place. You can top up the coolant or flush the system to clear any blockages if the coolant level is low. A faulty thermostat needs to be replaced, especially if it is stuck and stopping coolant flow. The water pump should be repaired or replaced without delay if you find it failing. A blocked or damaged radiator may require flushing or a full replacement. Similarly, the fan motor or relay may need to be replaced if the cooling fan is not functioning properly.
Preventive maintenance tips
The best way to avoid the dreaded engine heat symbol is through regular care. You need to:
- Service regularly and follow the manufacturer’s schedule for coolant flushes and system checks.
- Check coolant levels regularly, especially before long trips.
- Change oil on time. New oil will reduce friction and keep the engine cool.
- Avoid idling too long. Switch off the engine if stuck in traffic.
- Replace ageing parts, such as batteries, spark plugs, belts and hoses, before they fail.
Role of car insurance in case of an emergency
Standard car insurance typically doesn’t cover engine damage resulting from overheating or oil leakage, unless it is caused by an accident. This is where a comprehensive car insurance plan with an engine protection add-on helps. It ensures that damages caused to the engine, whether by oil leaks or water ingress, are covered.
A third-party car insurance only covers damages caused to another person’s car or property involving your vehicle. It doesn’t offer any cover for your own car.
Conclusion
The engine temperature warning light is not something to ignore. However, you shouldn’t panic either. It is simply your car’s way of asking for attention before things go wrong. A quick response, regular upkeep and a clear understanding of what the light means can improve road safety.
With the added support of engine protect in car insurance, you will be prepared for unexpected situations that come your way on the road.
FAQs
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What does the engine temp warning light mean?
The engine temperature warning light means the engine is getting too hot and could overheat if not checked in time.
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Can I keep driving if the engine temperature warning light is on?
Driving with the engine overheating symbol warning light on can lead to serious damage to the engine.
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What should I do when the car engine heat symbol appears on the dashboard?
If the car engine heat symbol or engine heat symbol comes on, stop the car, turn off the engine and let it cool before checking the coolant level.
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