What is the fault of the high water temperature of the air conditioner when the car is opened

1. The cooling water in the engine water tank reaches the boiling point, and produces a large amount of water vapor, which will produce a large number of bubbles, and a part of the cooling system is occupied by bubbles, which will make the cylinder wall around the serious water deficit, so that the engine lacks cooling, and will reduce the strength of the piston, piston ring, connecting rod and other components, and even deform, and can not bear the normal load, and at the same time, it will also destroy the normal gap between the parts, so that the normal oil film can not be maintained between the parts, and the engine will pull the cylinder and pull the swag. In other cases, the entire engine can be damaged or even scrapped.

2. Selection of antifreeze: the freezing point of antifreeze is 10 lower than the minimum temperature in winter in the place of residence. The mainstream brand products of antifreeze are basically 40-60 yuan a barrel, with a capacity of 4 liters (the volume of the general car water tank is almost 4L).

The ** of the original concentrated antifreeze may be slightly more expensive, generally about 80 yuan a bottle, and the capacity is about that. When replacing the antifreeze, it is necessary to add it in proportion, and in general, the ratio of antifreeze to water is 1:1 or 1:

A ratio of 2 is sufficient.

3. The replacement cycle and replacement method of antifreeze.

The recommended replacement cycle of the original antifreeze will vary from manufacturer to manufacturer, but the vast majority of them recommend that car owners replace the vehicle antifreeze every 2 years, and some manufacturers show that their original antifreeze replacement cycle is 4 or 5 years. But no matter what, in short, it has to be replaced, which is nothing more than the length of the replacement cycle.

4. When replacing the antifreeze, the first and most important thing is to wait for the vehicle to cool down, and do not replace the antifreeze when the engine is at a high temperature. First, there will be a risk of burns, and secondly, the release of antifreeze during the "hot car" will also affect the cooling of the vehicle.

5. When filling with new antifreeze, you can directly pour about about (depending on the model) of antifreeze into the storage tank, and stop filling after the liquid level height reaches the upper limit max position. At this time, unscrew the drain screw next to the "water pipe", and continue to start filling the antifreeze, see the antifreeze gushing out of the drain screw continuously and without bubbles, and then tighten the drain screw, so far the first time to fill the antifreeze and release the air The work is basically completed.

After starting the vehicle, idle for 3-5 minutes to let the vehicle enter the normal working temperature, and make the new antifreeze can be fully circulated in the waterway in the car, and then turn off the engine, open the reservoir will find that the liquid level height has decreased, then only need to add an appropriate amount of antifreeze to keep the liquid level between max and min.

The heat dissipation of the condenser is not good, just clean the surface of the condenser.

The possible situations of high water temperature of Jetta air conditioner are: poor heat dissipation of radiator, thermostat failure, insufficient coolant, poor operation of water pump, abnormal water temperature sensor, instrument, and circuit.

The specific situation of the high water temperature of the Jetta air conditioner:

1.Poor heat dissipation of radiator: This situation mostly occurs in months when there are more catkins and cotton wool. During the inspection, you only need to open the hood of the starting cavity to observe whether the radiator behind the bumper contains too many foreign objects;

Solution: You need to go to the repair shop to clean it;

2.The thermostat cannot be opened normally: in this case, the coolant cannot circulate normally and cannot play a cooling role, mainly because the water tank and return pipe are at room temperature, and the upper and lower water pipes will become very hard due to the expansion of the gas in the water pipe;

Solution: The thermostat needs to be repaired in time;

3.Lack of coolant: This is a relatively easy situation to observe;

Solution: Open the engine compartment to see if the coolant level meets the requirements;

4.Poor operation of the pump: sometimes the pump belt will slip and idle due to too long use;

Solution: When this kind of problem occurs, the most important feature is that it will return to normal after stepping on the accelerator for a period of time;

5.Abnormal water temperature sensor, meter, and circuit: If the above problems have been eliminated, the water temperature exceeding the standard may be caused by the failure of the water temperature sensor or the failure of the meter or circuit;

Solution: At this time, you should go to the repair station in time for a detailed inspection. Millions of car purchase subsidies.