Analysis of high water temperature faults in car maintenance knowledge

The use of vehicles in the hot summer weather, especially when the air conditioner is turned on or running under long idling conditions, often causes the water temperature to rise, and even the problem of boiling. So what caused the vehicle water temperature to rise, and then broke down on the side of the road?

Problem link: The air conditioner is not turned on, and the water temperature is stable and normal. But when the air conditioner is turned on for 5 minutes, the water temperature rises, and the water temperature rises faster when the car stops. My car's water temperature gauge does not have a specific temperature. The pointer in the white area is 1/3 of the normal water temperature. After the air conditioner is turned on, it reaches about 2/3, but it does not heat up near here.

Netizen BORA8031 replied: 1. CleaningWater tankHeat sink 2, checkThermostat3. Check whether the electronic fan is working normally and whether there is high speed 4. Check the water temperaturesensor

1. Check the reason for the high water temperature of the vehicle. The first thing to do is to check whether the cooling water in the water tank is sufficient, and secondly check whether there is a large amount of dust and debris accumulated on the outer surface of the water tank. Especially in the northern regions, due to the heavy wind and sand, roughly the surface of the radiator fins of the water tank absorbs a lot of dust. In addition, for vehicles that drive on high-speed roads for a long time, a large number of insect corpses will also adhere to the surface of the radiator fins of the water tank. The situation is a common problem that causes poor heat dissipation of the water tank. The solution is to rinse the surface with a high-pressure water gun to achieve the purpose of cleaning the surface of the heat sink.Another point is that the inside of the water tank is airtight for a long time.antifreezeOr water, the scale that appears will also affect the heat dissipation effect, what needs to be done at this time is clearheat sinkInternal and engine water jacket, the specific method can be filled with appropriate amount of descaling agent.

2. Next, check whether the rubber pipes at the inlet and outlet of the water tank are dented, layered, blocked, etc. When the rubber tube is used for a long time, because the inner wall layer will affect the circulation of the coolant.

3. Check whether the electronic fan of the auxiliary water tank radiator works normally, and focus on whether the electronic fan itself will switch between high and low speeds depending on the working conditions and load conditions.In addition, you should also observe whether the blades of the electronic fan are deformed, and finally checkfanFor the tightness of the tape, the general method is to press the middle of the tape with a force of 30-50N with your thumb, and the deflection of the tape should be 10-15mm. (AsiaInfocar)