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List of contents of this article:

• 1,What's wrong with the car cooling fan keeps turning
• 2、The working principle of turning on the fan on the car
• 3, The car turns as soon as it starts the cooling fan
• 4, What is the reason why the car cooling fan keeps turning?
• 5, What should I do if the car's water temperature is normal and the fan doesn't stop?

What's wrong with the car cooling fan keeps turning

[Pacific Automobile Network] It may be the reason for the circuit's virtual connection. You can try to unplug the wiring harness of the fan and cut off the power separately. In addition, in this case, the water temperature sensor may be damaged or the fan relay contact is stuck. Just go to the repair shop to replace a new one.

If the car has been completely cooled, if it is still turning, it may be a failure of the cooling fan's assembly or the cooling fan's line.

The reason why the car cooling fan keeps turning is as follows: the water temperature in the water tank drops slowly, and the water temperature has not dropped when the engine is just turned off. At this time, the cooling fan will still stop working for a period of time.

The engine temperature has dropped and the fan is still turning, which may be the reason for the virtual connection of the circuit. You can try to unplug the wiring harness of the fan and carry out a separate power-off treatment.

The working principle of turning on the air conditioner on the car

The working principle of the car fan is as follows: car The high and low speed of the fan is "the only" controlled by the thermal switch (F18). This switch has two gears and is installed on the water tank to detect the water temperature. It sends two-speed signals to J293, and J293 then conducts different open circuits to control the high and low speed of the electronic fan. Turn on the air conditioner, and both fans should turn.

The compression process of the working principle of automobile air conditioning: the compressor sucks in the low-temperature and low-pressure refrigerant gas at the outlet of the evaporator and compresses it into high-temperature and high-pressure gas and discharges it into the compressor.

[Working principle of automotive electronic fan] Automotive electronic fan is controlled by the engine coolant temperature switch. Usually there are two 90 speeds, one 95 low speed and two high speeds. In addition, turning on the air conditioner will also control the operation of the electronic fan.

The air conditioner will also control the operation of the electronic fan when it is turned on. One is a silicone oil clutch cooling fan, which relies on the characteristics of silicone oil hot swelling to drive the fan to rotate; an electromagnetic clutch cooling fan, which drives the fan by the principle of electromagnetic field absorption. The car fan is installed behind the water tank, and when it is turned on, the wind is pulled in from the front of the water tank.

The car turns as soon as it starts the cooling fan

1. The reasons why the car turns as soon as it starts the cooling fan are as follows: when the water tank temperature is too hot, the fan of the water tank will start.

2. If the fan turns as soon as it is ignited, it must be abnormal, because the cooling fan will only turn after the water temperature reaches the value. If so, it is recommended to check the water temperature sensor or read the fault code of the vehicle first, and you can try to clear the fault code.

3. It must be abnormal for the engine to turn as soon as the fan is started. Because when the vehicle starts, the water temperature does not reach a certain range, the fan will not work; if this happens, the owner had better check the water temperature sensor or read the fault code of the vehicle, and clear the fault code before reading it again.

4. This situation is abnormal. Under normal circumstances, the water temperature does not reach a certain range when the vehicle starts, and the fan will not work. Only when the water temperature of the motor vehicle reaches a certain height will the fan turn to dissipate heat.

5. When the cold car starts, the fan rotates. In this case, the engine water temperature sensor may be damaged, causing the cooling system to enter the emergency state, or the fan control system is faulty, such as the fan controller is damaged. This will also happen when the air conditioning pressure expansion valve is blocked and the pressure of the air conditioning system is too high.

6. Of course, the thermostat and the water pump work together, so it is necessary to dissipate heat at a certain temperature. How to solve the problem of the car fan not turning: check whether the water temperature relay is broken, or whether the contact is bad or there is no response, and replace it. The temperature control switch is damaged, causing the fan to fail to turn on when the water temperature is high.

What is the reason why the car cooling fan keeps turning?

1,The reason why the car fan keeps turning is that the car fan has the effect of dissipating heat. When the temperature of the coolant is too high after parking, the driving computer will automatically calculate the speed and time of the fan. The higher the temperature, the longer the fan will rotate, thus playing a role in protecting the engine.

2. If the car has been completely cooled, if it is still turning, it may be due to the failure of the cooling fan's assembly or the line of the cooling fan.

3. The reasons why the car cooling fan keeps turning are as follows: the water temperature in the water tank drops slowly, and the water temperature has not dropped when the engine is just turned off. At this time, the cooling fan will still stop working for a period of time.

4, but if the car has completely cooled down and the fan still does not stop or keeps turning, it may be heat dissipation.If the sembly of the fan or the circuit of the cooling fan is faulty or the water temperature is too high, it is recommended to go to the store and ask the master to troubleshoot the fault.

5. The fan in the car plays a role in heat dissipation, so when the temperature of the coolant is too high after parking, the driving computer will automatically calculate the speed and time of the fan, so the higher the coolant temperature, the longer the fan will rotate, thus playing a role in protecting the engine, so there is no need to worry. , is a normal phenomenon.

What should I do if the car's water temperature is normal and the fan doesn't stop?

1. If the water temperature is normal but the fan keeps rotating, you need to check the water temperature sensor first. Nowadays, cars use water-cooled engines, which rely on the coolant to continuously circulate in the engine to take away excess heat.

2. The sensor of the water temperature of the vehicle needs to be replaced. If this problem occurs, the sensor fails. If the sensor cannot detect the temperature of the engine, the fan will be working all the time. Although this situation has no impact on the use of the engine, it has an impact on the service life of the accessories, and it should be repaired in time.

3. Gearbox thermoster: For the gearbox, BMW cars are equipped with a separate thermostor, which sometimes may be caused by the abnormal temperature control caused by the problem of this thermoster. Water pump: Is it working normally? Is the speed too high?