Well, it's hot recently, and the water temperature is high when the air conditioner is turned on. What happened?

1, there are many reasons for the engine water temperature to be too high or even "boiling", such as the damage of electronic components in the cooling system (thermostat, cooling fan), poor heat dissipation of the radiator, and insufficient coolant.

Pull over, but don't turn off the engine immediately! Because the temperature of the coolant is already very high and the cooling capacity has reached the limit, if the engine is turned off immediately, the boiling coolant will stop circulating (for most engines, the water pump is driven by the crankshaft).

Of course, it would be better if the engine is an electronic water pump. The temperature is too high to be cooled, and the engine is unbearable. If the engine is idling for a period of time, the continuous circulating coolant can still reduce the influence of high temperature on the engine.

4. Check whether the lack of antifreeze leads to high engine water temperature. Whether the circulation of coolant is not smooth. Secondly, you can also check the water temperature sensor, water pump, thermostat, cooling fan and so on. Can cause the water temperature to be too high. If the hands-on ability is not strong, you'd better go to the repair shop for inspection.