As soon as the car slows down, the water temperature will come up, and the water temperature of the

For the problem you said is not too clear, the description is too simple, you can try this simple method first;

1.The water tank needs to be cleaned, and it is also possible that there are debris in front of the water tank that affects the heat dissipation. (Observe for yourself if there is such a problem).

2.If it only shows that the water temperature is high, it may also be caused by an inaccurate water temperature sensor. Change the water temperature sensor.

3. After a period of normal driving, the water temperature rises, touch the water pipe with your hands and confirm that the water pipe is hot and the water pipe is cold, the thermostat is not open, the normal temperature is the same, and the thermostat needs to be replaced.

Hello, the electronic fan is broken, it must be that the electronic fan is broken, because when your car is driving at high speed, the air intake will also give you a large amount of heat dissipation to the water tank, if your car stops, there will be no wind blowing, so that the water temperature will naturally come up, I hope mine can help you. [Car questions, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

Hello, it may be that the fan is running at low speed, or the water pump is broken and the water circulation is not good, it is recommended that you go to the repair shop to take a look, so as not to damage the engine due to high temperatures, I hope it can help you, I wish you a happy car! [Car questions, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

See if the belt of your cooling fan is loose.

The vehicle has a warm-up process after starting, the phenomenon that the water temperature rises very slowly is that the engine is warming up, the length of this time is determined according to the water temperature sensor's perception of the water temperature, if there is no problem with the water temperature sensor, it may be that the thermostat always carries out a large cycle to cause the water temperature to rise relatively slowly, mainly check the following two aspects (in the case of landing, the temperature difference between the radiator water inlet pipe and the outlet pipe can be judged whether it is a thermostat problem). Or go to the 4S store for inspection.

The reason why the engine water temperature is too low is generally that the thermostat cannot be turned off due to damage to the thermostat, or that the cooling fan is faulty and in a state of constant rotation. When the thermostat valve fails to close, the coolant is always circulating and the water temperature of the engine will drop quickly.

The thermostat is actually a control valve that controls the circulation of coolant in the cooling system, whether it is a large cycle or a small cycle. The large circulation refers to the route in which the coolant flows when the thermostat is turned on.

There are several possible reasons for the slow water temperature of the car: the first case, due to the low outside temperature, the engine water temperature can not reach the normal temperature for a long time, this situation is a normal phenomenon, in the process of using the car, only need to confirm the length of time for the water temperature to rise under the same temperature conditions, no need to repair. In the second case, the water temperature of the engine has actually reached the working temperature, but the water temperature sensor of the cooling system is damaged, the circuit is broken, or the instrument cluster itself is faulty, resulting in the abnormal water temperature display of the instrument cluster.

In the third case, because the cooling system should be in a small cycle state at low temperature, but because the thermostat is normally open or the opening angle is not closed, the engine cooling system has been in a large cycle state. The fourth case, which is relatively rare, is caused by the use of substandard antifreeze in the vehicle, which has a slow thermal conductivity of the coolant, so that the water temperature rises very slowly when the water temperature sensor measures.

The slow water temperature may be caused by a large circulation of coolant due to damage to the thermostat, or it may be caused by the empty heating function being turned on just after the engine is started, which can also cause the water temperature to rise slowly. When this happens, it is advisable to check if the thermostat is still working properly.

Most cars use water-cooled engines, which rely on a constant circulation of coolant in the engine to dissipate heat. The coolant has two circulation paths in the engine, one is a large cycle and the other is a small cycle.

A thermostat is a component that controls the large or small circulation of coolant.

When the engine is first started, the amount of coolant circulating is small. At this point, the coolant does not dissipate heat through the radiator tank, which helps the engine heat up quickly.

When the engine reaches normal operating temperature, the coolant circulates in large quantities. At this point, the coolant flows through the radiator tank to dissipate heat, allowing the engine to stay within the normal operating temperature range.

If the thermostat fails, it causes the coolant to circulate in a larger or smaller way all the time.

If the coolant continues to circulate in small amounts, the engine temperature will be too high.

If the cycle goes on all the time, the water temperature rises too slowly when the engine starts in gear corners.

Some cars also use more expensive electronic thermostats, which are easy to damage after long-term use.

Because there is an important part of the cooling system next to the water pump - thermostat, when the car starts cold, the thermostat is not opened, so that the coolant does not pass through the water tank, only a small circulation is carried out inside the engine, and when the temperature of the engine reaches more than 85 degrees, it will be opened, the hot water in the engine is pumped into the water tank, and the cold wind blows through the water tank when the car is driving, taking away the heat, and the heat exchange is carried out to cool down the engine.

It can be seen that the thermostat is an important part of the engine to control the water temperature, and it is a device that turns off and opens the large circulation of engine coolant. A malfunction of the thermostat can cause the main valve to not open or close properly.

When the thermostat cannot be turned on normally, the engine cannot start the large circulation, and the overheated coolant cannot enter the water tank, which makes the engine temperature too high; At this time, the coolant temperature and pressure are high, which can easily cause damage to the small circulation system, such as gaskets, heater water tanks, and some water pipes.

When the thermostat cannot be closed normally, the cooling system of the car has been in a state of large circulation since the cold start. The water temperature rises slowly, especially in winter, and hot cars can be extremely slow. The water temperature is low, and the signal provided by the water temperature sensor to the ECU will increase the amount of fuel injected into the engine, and the car will naturally consume fuel.

The problem of thermostat failure mostly occurs in the cracking of the thermostat body or the aging of the rubber tube, the cracking of the thermostat, and the abnormal circulation of cooling water, which will cause the water temperature to rise and boil. Don't underestimate this widget, once damaged, it can easily cause a big failure. Generally, the thermostat is not a big problem to use for more than 50,000 kilometers, and the thermostat is generally not expensive, and it is relatively simple to replace.

It is not difficult to judge whether the thermostat is damaged, and the owner can identify it by himself.

In the summer, the owners who suffer from the high temperature of the engine water hope that the rise of the water temperature can be slower, especially for those vehicles that are not in very good condition, in order to completely achieve the alleviation effect, some owners simply remove the thermostat to keep the engine cooling system in a state of large circulation, but this way is obviously a symptom rather than a cure. In winter, the resulting *** began to appear. Without thermostat control, the cooling system will always be in a state of high circulation, which will not guarantee the thermal efficiency of the engine, and therefore the water temperature will rise more slowly.

In the case of sound structure, when the engine is just started, the thermostat is relied on to achieve a small circulation state of coolant, which can help the engine water temperature to reach the best working temperature of Songshi as soon as possible, and when the water temperature tends to the optimal working temperature, the thermostat is opened, and then the coolant is circulated, and the water tank radiator of the residual head of the car field is used to maintain the best temperature state. The thermostat performance is not good Relying on the disassembly of the thermostat to delay the water temperature rise is extreme, but also niche, more car owners still hope to maintain the original structure of the engine, however, when you feel that the speed of the water temperature rise is slower than before, it may also be a problem with the thermostat. Do you know the cause of the failure that causes the high water temperature?

As the thermostat does not open sufficiently, the coolant circulation is poor, which ultimately leads to high engine water temperatures. The opposite is true of the slow rise in water temperature caused by the thermostat, which is inevitably affected by the fact that if the thermostat is not closed tightly, the coolant that should be flowing in a small circulation state will jump into the large circulation pipeline. In other words, the larger the gap in the thermostat, the less likely the water temperature will rise.

Solution Improving the function of the thermostat is the most effective, however, some car owners simply cover the grille in order to save trouble, so as to reduce the heat emitted by the front radiator and make the water temperature rise as soon as possible. Easy car netizens.

Hello, nice to meet you. I'm Xiaomo, an auto repair consultant. With 15 years of experience in automobile maintenance, he is currently working in FAW-Volkswagen, one of the world's top 500 state-owned enterprises, with a senior certificate for automobile maintenance and a certificate for auto beauty technicians, and is familiar with the detailed configuration of major brands of vehicles, and has provided comprehensive automobile repair and maintenance consulting for tens of thousands of customers.

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Why does the water temperature drop as soon as the car is driven, the water temperature of the normal car idling does not go up, the water temperature goes down again, the slow run is normal again, and the thermostat has been replaced, I don't know what the reason is.

Hello, nice to meet you. I'm Xiaomo, an auto repair consultant. With 15 years of experience in automobile maintenance, he is currently working in FAW-Volkswagen, one of the world's top 500 state-owned enterprises, with a senior certificate for automobile maintenance and a certificate for auto beauty technicians, and is familiar with the detailed configuration of major brands of vehicles, and has provided comprehensive automobile repair and maintenance consulting for tens of thousands of customers.

We are typing the answer by hand, so please be patient for a while. I'll give you a solution in a few minutes, thanks! ❤️

It is mainly caused by the following reasons.

The first is that the engine cooling system thermostat is damaged – it needs to be repaired.

Second, the ambient temperature you are in is too low,—— which is less likely.

3. It is due to the error of the vehicle's computer instruction display, resulting in abnormal water temperature display.

The thermostat is new, and there is no warm air when the water temperature goes down, is it normal?

If there is no warm air at the normal time when the water temperature is normal, then there is a problem.

It's normal that there is no warm air when the water temperature goes down.

When the water temperature is normal, there is a warm air, that is, the water temperature is abnormal and can not find the reason, the thermostat is new, the car runs fast and the water temperature goes down, and the water temperature is normal when the car stops slightly.

Has the water temperature sensor been replaced?

Is there an answer to the change?

When is the water temperature abnormal?

The water temperature of the car can go up within 30 to 40, and the water temperature will drop within 70 to 80, and the water temperature will be normal again as soon as the car stops slightly.

In your case, the thermostat has poor contact, which causes the engine to be overcooled and the water temperature to drop.

It should be caused by the poor removal at the thermostat interface.

Summary. Hello, the water temperature of the car is used in winter is relatively slow, once you get on the road after sleeping, this temperature will fall immediately, if this happens, 80% of the reasons are because the thermostat is faulty.

Hello, I'm a master who has been pointing to land for decades! I've seen your problem with the bridge! I'll get back to you within five minutes, and if you're satisfied, can you give me a thumbs up? Thank you!

Hello, the water temperature of the car is used in the winter of tomorrow when the water temperature rises relatively slowly, once you get on the road after sleeping, the temperature will fall immediately, if this happens, 80% of the reasons are due to the failure of the thermostat.

The water temperature is normal when you are still in place, and the water temperature is abnormal when you run fast, and there will be a drop.

I went to the repair shop and said that the thermostat was fine.

Normally, it's all the reason for the thermostat, and the other effects can't be this.