
Specific reasons are as follows: 1. Cooling fan not working: The cooling fan may be controlled by a thermostat switch or a water temperature sensor. 2. Insufficient cooling medium: Antifreeze: High-end cars require antifreeze to be added all year round. Water or distilled water can be used as a temporary substitute. Leaking radiator cap. 3. Thermostat damage: When removing the thermostat, the small circulation should be blocked to ensure all coolant is cooled by the radiator. When installing a new thermostat, ensure there is a water hole, such as in the Santana which lacks one. 4. Radiator blockage: External blockages should be cleared with water or air. Internal blockages can affect coolant circulation and create pressure, leading to two outcomes: radiator leakage or extremely high water temperature during high-speed driving.

A red coolant temperature light usually indicates engine overheating. I encountered this situation last time while driving a Nissan Sylphy. It was caused by insufficient coolant level, which led to poor heat dissipation. Other possible reasons include a malfunctioning fan or a stuck thermostat. I immediately pulled over, turned off the engine, and popped the hood to let it cool down. After cooling, I checked the coolant level and found it was indeed low. I temporarily added some water as an emergency measure before heading to a repair shop to refill the coolant. This incident reminds us to regularly inspect the cooling system, such as checking the coolant reservoir monthly to ensure the level stays between MIN and MAX marks. Even minor leaks can cause serious problems. Ignoring it may lead to engine seizure, resulting in repair costs exceeding thousands. So never delay when the warning light comes on.

The red coolant temperature warning light is really annoying! I've encountered this with my Nissan Sylphy too, and it's most likely a cooling system issue. It could be a leaking radiator, a faulty fan that's not dissipating heat, or deteriorated/low coolant level. When you see the red light, immediately find a safe place to park and turn off the engine without restarting it. Check if the coolant reservoir is empty. If the level seems normal, wait about half an hour for the engine to cool before opening the hood (be careful of burns!). Then have a friend help check if the cooling fan is spinning properly - slow rotation often triggers the warning light. Regular maintenance can prevent this. I frequently clean radiator dust, which makes my car run much smoother. Don't wait until it becomes a major problem to panic!

A red coolant temperature light indicates overheating, primarily caused by insufficient coolant or cooling system issues. Common causes in the Nissan Sylphy include fan failure or thermostat malfunction. If the light comes on, stop the vehicle immediately to prevent engine damage. Check the coolant level first - add water as an emergency measure if low, then top up with coolant later. Fan issues require professional repair. Regular maintenance helps prevent this fault.


