Why does the car water temperature warning light come on?

The water temperature indicator lamp is used to display the temperature of coolant in the engine. When the key door is opened, it will light up for a few seconds and then go out. The water temperature indicator is always on, indicating that the coolant temperature exceeds the specified value and needs to stop driving immediately. Extinguish when the water temperature is normal.

0 1, insufficient coolant

Coolant leakage will cause its temperature to rise. At this time, check whether the coolant leaks! If so, the leaking pipe should be repaired as soon as possible. If not, add the same brand coolant in time! It is not recommended to add water, especially in winter, even if it does not cause failure, it will dilute the coolant!

02. There is something wrong with the cooling fan.

Problems with the cooling fan will cause the heat generated when the vehicle is driving at high speed not to be transferred to the antifreeze in time, which will affect the heat dissipation, and then lead to the temperature rise of the antifreeze, leading to boiling and other problems! In this case, if you are driving, slow down first. Check whether it is a fan problem. If so, repair it in time. Don't wait for the pot to boil before repairing it!

03. Mercury in circulating water

Once the water pump fails, the water circulation on the heat conduction side of the engine cannot be carried out normally. If the engine cooling system fails, there will be "boiling" phenomenon! Be sure to find it early and solve it early. There is something wrong with the general water pump, which may be that the bearing is locked or the impeller is damaged! The bearing is unlikely to lock. The impeller is broken, just replace it!

Extended information 1. When the water temperature of the vehicle is abnormal, the water temperature alarm indicator on the dashboard of the vehicle will light up. In the case of uncertain fault, it is best not to risk driving on.

2. When the water temperature is too high, you should slow down first and then drive to the side of the road. Don't turn off the engine in a hurry. You should keep idling for a while and try to cool down. Open the lid to dissipate heat.

3. Don't pour cold water on the engine during cooling, which may cause the engine block to burst due to sudden cooling.

Let's see if the cooling fan works normally. Failure of the cooling fan will cause the coolant temperature to rise.