The car water temperature gauge is constantly changing

That's normal. The vehicle runs normally at a constant speed, and basically the water temperature is constant. If you are stuck in traffic and always idling and driving at low speeds, the water temperature will rise.

Hello, it's either bad or bad.

Bad iron or broken water temperature gauge.

The high water temperature gauge of the general instrument indicates that the cooling system of the engine is faulty, and the common fault points are:

1.The lack of antifreeze in the engine cooling system may be due to a leak in the engine, such as a leaking water pump, broken pipes, broken water tank, etc.

2.A malfunction in the thermostat in the engine cooling system caused the water to be too hot. The temperature of the coolant was too high because the thermostat could not be turned on, which hindered the flow of coolant inside the engine.

3.The cooling fan in the engine cooling system is not working properly, resulting in poor heat dissipation of the coolant. So the water temperature light is on, causing the coolant temperature to be too high.

4.The water pump in the engine cooling system is faulty, and the water pump does not rotate smoothly, resulting in poor flow of coolant, so the water temperature light is on, and the coolant temperature is too high.

The above are common fault points, and the specific fault points need to be checked to determine the vehicle.

Reasons for the high water temperature:

1.The fan V belt is too loose or broken (check the fan belt).

3.Insufficient cooling overflow (check if the tank is short of water).

4。Check the fan coupler, if the water temperature is high and the coupler does not open, it means that the fan coupler has been damaged and replaced.

Depending on your situation, it should be these four reasons, and you check them one by one, which are nothing more than these reasons.

Of course, there are other situations that arise, but yours is not, and it is also beneficial to introduce it, I hope you understand it:

5。The ambient temperature is too high.

6.Some of the spark plugs are not working well.

7.Ignition is too late.

8.The mixture is too thin.

9.Cylinder water to gasket sealing is not tight.

10.The radiator part is clogged and there is too much dirt.

11.The engine is partially blocked by water.

12.Drive at low speeds downwind.

1.It may be that there is too much dust on the surface of the water tank or something like catkins and poplar hairs, which causes poor heat dissipation, and you can rinse the water tank well with a water hose.

2.It is possible that the pump is broken.

3.The electronic fan is broken, and the electronic fan is the one on the back of the tank. If the water doesn't turn when the temperature is high, it's broken.

You can see if the line of the electronic fan is inserted into the porcelain, and then see if the insurance burns or not, if it is no problem, it is completely broken, and it has to be replaced with a new one.

4.It's also possible that your water temperature gauge is broken.

5.When you're running out of water or antifreeze, see if you still have water in your rehydration tank.

If none of this is true, then I don't know.

Poor heat dissipation of the engine and air conditioning system causes the water temperature to be too high, and the following six types of faults generally occur (applicable to FAW-Volkswagen and SAIC models).

When the engine water temperature gauge is too high in traffic jam or idling for a long time, the working time of the electronic fan in high-speed gear is too long, the engine noise increases, and the fault is most obvious when the air conditioner is turned on in high temperatures;

When the air conditioner is turned on in high temperature weather, the idle speed is unstable, the speed fluctuates too much, the rapid acceleration is weak, and the engine has abnormal noise;

After the hot car is turned off for more than ten minutes, it is not good to start the car when it is started again;

When a hot car is running, it sometimes turns off automatically;

The refrigeration temperature of the air conditioner is very cool when the car is cold, and the air conditioning refrigeration effect is not good when the car is hot, and there is a large resonance hum sound in the air conditioning system;

When the hot car is idling, the clutch of the air conditioning compressor is frequently sucked off or even disconnected, resulting in the air conditioner of the hot car not being refrigerated.

The outside of the engine is covered with water.

The water in the tank is used to cool the engine.

The engine, in particular, is supercharged.

The operating temperature can be up to 600 degrees.

The water from the tank is constantly circulating to cool the engine.

The heat of the hose is cooled by a fan.

The cooling fan does not turn. The cooling fan may be controlled by a thermostat switch; It may also be controlled by a water temperature sensor.

Insufficient cooling medium. Antifreeze: High-end cars are required to be filled with antifreeze all year round; Water or distilled water: temporary substitute; The water tank cover is leaking.

The thermostat is damaged. If you want to remove the thermostat, you should plug the small circulation at this time, so as to ensure that all the coolant is dissipated by the water tank; When installing a new thermostat, you should pay attention to the water hole, such as Santana does not have a water hole, at this time, a 6mm drill bit should be used to drill a hole. One function is to be used as a marker; Another function is that during the heating process of the car, the temperature difference between the two sides of the thermostat is generated, so that the thermostat is accurately opened with the water temperature.

The water tank is clogged. External blockages should be removed with water or gas; Internal blockages affect coolant circulation and create pressure, which can result in two outcomes, one is a leaking water tank or the other is a particularly high water temperature at high speeds.

Pump failure. The impeller slips or gets stuck, causing the timing belt to break; The impeller is deformed.

Cylinder corrosion. The combustion chamber and the waterway are flushed, and at this time, the water will be drained from the drain pipe or white smoke will be discharged, resulting in a frequent shortage of water in the water tank; The waterway and the oil channel are flushed (the oil is white when there is water); The waterway and the waterway are rushed, resulting in poor heat dissipation of the cylinder block, especially at high speed; Blocked waterways.

Incorrect ignition timing (corrected with timing lamp) and excessive oil pressure.

It is recommended that you go to the repair shop for an inspection, so that the location of the fault cannot be completely determined.

For example, "as soon as the throttle is increased", it is impossible to determine to what extent, how long it takes, and how fast the water temperature rises.

Focus on thermostats and water temperature sensors.

It has nothing to do with the engine, have you ever added different antifreeze or tap water? If you have used different antifreeze, it is possible that the antifreeze will deteriorate If you have added tap water, there may be rust in the water tank, and it may be that the water temperature sensor is broken, what kind of car are you?

When the vehicle is first started, the water temperature is generally very low, especially in winter, and the car should be warmed up first. After starting the car, the final thing to do is to see if the water temperature is normal. Generally, when the water temperature gauge reaches the middle position, the hot car is completed.

At this point, you can drive according to your driving habits. Until then, drive slowly. If the water temperature does not reach the normal temperature, do not turn on the air conditioner.

The water temperature is very important when driving, but strictly speaking, our water temperature meter now shows the so-called water temperature, you can think about it, if we operate according to the regulations, there is no chance to add water to the car. The wiper water refill should be the wiper agent, and the antifreeze port is antifreeze, so the water temperature on the car now shows the temperature of the antifreeze. Water temperature actually refers to the temperature of antifreeze, and the inside of the engine is not only covered with oil pipes, but also all over the antifreeze water channels.

The normal water temperature of the automobile engine should be between 80 degrees C, and the water temperature is high if it exceeds 90 degrees C. Check and inspect frequently, keep the cooling system not leaking, not wearing, the radiator should not be too dirty, and often discharge the sediment in the water tank to supplement the cooling water, so that the parts work normally When the car is cold, the antifreeze flows back to the lower half of the water tank, and at the same time the car is energized, the water pump works at the same time, so that the antifreeze forms a waterway circulation in the engine waterway and takes away the heat of the engine.

The normal operation of the automobile engine needs to reach a certain temperature, too high or too low is not conducive to the normal operation and performance of the engine, and the temperature displayed by the so-called car water temperature gauge is the temperature of the coolant. To ensure that the engine is operating within the normal temperature range, the car is equipped with an engine coolant temperature sensor, which is usually displayed separately on the car's dashboard (water temperature gauge) and an alarm will appear if the antifreeze temperature is too high. Generally, the normal water temperature of the car is about 90 degrees, and when the temperature reaches about 98, the fan begins to cool down the antifreeze of the water tank.

The water temperature meter does not move, the possible reasons are: 1. The water temperature sensor is faulty or aging; 2. Water temperature induction plug failure; 3. Line problems; 4. The pointer of the water temperature meter is faulty. In case of this kind of problem, it is recommended to go to the auto repair shop, use the car computer detector to detect the engine system, read the fault code, look at the dynamic parameters, and do component testing, so that the problem can be accurately found.

Hello, I'm inquiring for you here, please wait a minute, I'll reply to you right away [happy] Hello, I'm happy to answer for you. The power cord of the water temperature meter in this city is broken, the electric ring of the water temperature meter is burned out, and the poor contact contact will also lead to the failure of the water temperature meter, and the voltage regulator that supplies the stable power supply of the water temperature meter circuit will also be damaged, and the water temperature meter will not move, and the water temperature meter will not move, and the owner of the water temperature meter will not be able to understand the temperature of the engine, and it is easy to fail.

Unplug the water temperature sensor, use a multimeter to detect whether the voltage between the two wires is the reference voltage, generally about 5V, and some models directly supply 12V voltage to the water temperature sensor.

I hope the above is helpful to you If you are satisfied with me, please give me a thumbs up

Answer: This is caused by mechanical failure, in this regard, I think that the maintenance master will repair the water temperature gauge of the car, probably enough.

There may be four problems caused by the following: insufficient coolant leads to high water temperature; The radiator is too dirty, resulting in high water temperature; Faulty thermostats cause high water temperatures; The water temperature is high due to a faulty electronic fan.

You need to check whether the line is broken first, because many times the line will have a short circuit or poor contact.

It may be because of a short circuit in the line, or it may be because there is a problem with the pointer, and I think the former is more likely.

It is possible that the water temperature sensor is broken, or there may be a problem with the wiring of the water temperature sensor.

When the car starts, the water temperature gauge is 0 and you can drive, but you have to preheat it in advance, you can only start cold, the cylinder block and the water temperature have not come up, the actual water temperature is about 45 degrees, the pointer of the water temperature gauge is still 0, not 0 degrees Celsius, and so the car starts for a period of time, the engine and water temperature can reach the normal temperature, and the water temperature is basically stable at about 90 degrees, then you can drive the vehicle normally.

The normal temperature of the car water temperature is 80-90 degrees. Too high or too low can have a detrimental effect on the normal operation and performance of the engine. The reason may be that after running for dozens of kilometers, the water temperature gauge has not changed at all, and there is a problem with the water temperature gauge line.

The addition ring of the water temperature gauge burned out, and the line contact was poor. The water temperature sensor is damaged. As a result, the temperature signal of the water temperature cannot be detected, so the needle of the water temperature meter does not move.

It can also be caused by the burning of the sensor plus ** ring or poor contact. The dashboard water temperature gauge itself is broken, the pointer does not move, and the water temperature gauge needs to be replaced. But in the actual situation, we can not see the real car, so we can not accurately judge the cause of the vehicle accident, for the sake of safety, it is recommended that you should go to a professional car repair shop in time for maintenance, so that professionals can check the problem, eliminate the vehicle problem, and ensure the safety of the driver and passengers.

<> the correct way to keep the water temperature meter of your car moving. First of all, check whether the end of the wire is broken and loose, if it is good, or the water temperature sensor meter is broken. You can unplug the water temperature sensor and put the plug on the wire.

Turn on the key and look at the thermometer on the meter with each turn. If the water temperature sensor is broken, do not replace the meter. The power cord of the water temperature meter is disconnected, the electric ring of the water temperature meter is burned out, and the electric ring of the water temperature meter sensor is burned out or the contact is poor.

The water temperature gauge sensor wire is improperly connected or disconnected. The voltage regulator that provides a stable power supply to the water thermometer circuit is damaged. You try the heating is hot.

And the temperature of touching the top tube and the bottom tube is the same. It is advisable to check if there is a thermostat. Once you're sure there are no issues, consider sensors, circuits, and water temperature meters.

It should be that the thermostat is broken, the thermostat is always on, and the coolant is always in a state of large circulation. It's better in the summer, but it's hard to get the water temperature in the winter.

This situation may be due to the failure of the operating table in the car, it is recommended to go to a professional car 4S shop for repair, if there is no problem, you can also manually adjust it within three degrees.

It may be that the water temperature gauge is malfunctioning, the critical boundary in the thermometer is damaged, the water thermometer is too old due to its long service life, and it is possible to see if the wiring is loose and there is a problem with the engine.

It is very likely that the water temperature gauge is broken because there is a problem, so it will not move, or it may be because the manufacturer's appearance is problematic.

1. Insufficient coolant: the long-term water circulation of the engine will cause the coolant of the engine cooling system to slowly lose, resulting in a lack of water in the water tank.

2. Water tank leakage: The water tank connection pipe is broken or the connection is not tight, which will cause water leakage, which will block the water circulation at this time, and cause the engine to "boil" in serious cases;

3. Cooling fan failure: The cooling fan is damaged or the wire is short-circuited, which causes the fan to work or the cooling fan to rotate slowly, which will cause the heat of the engine to be unable to dissipate, and the water temperature of the engine will naturally rise;

4. Thermostat failure: The thermostat is a device that controls the flow path of coolant, once it is stuck or fails, the size and circulation of the engine will inevitably be affected, and the heat of the engine cannot be effectively dissipated;

5. Water pump failure: After the water pump fails, the water of the engine heat conduction cannot be circulated and updated in time, so the water temperature will rise rapidly after the engine starts, and the water temperature warning light on the instrument panel in the car will also be on.