VAZ 2114 injector cooling fan does not turn on reasons

A fan on any car, and the VAZ-2114, equipped with an injector, is no exception, is necessary for forced ventilation of the radiator. Thanks to this, the liquid circulating there is cooled more actively, and a more or less acceptable constant temperature is maintained on the motor. When the car is driving fast, the fan will not work - in this case, the power unit has enough natural air pressure. Standard cooling starts during stops (without stopping the engine) or when driving slowly. Like any other car component, the fan can break. How to find the cause and eliminate the malfunction is described below.

Operating principle of the cooling system

The cooling system on a car is a closed pipeline in which a special liquid circulates.
It constantly transfers heat from the running engine to the radiator, where cool air lowers its temperature. In hot weather, when driving slowly or during stops, without stopping the engine, the power plant may overheat. To avoid this trouble, the VAZ-2114 injector has an electric fan, which is turned on automatically by a special sensor when the engine reaches a critical temperature. On the model under consideration, the response threshold is 85 degrees. When the engine cools down, the thermostat stops the forced airflow.

The location of the fan on the VAZ-2114 injector is the engine compartment. It is screwed to the inside of the radiator. The unit in question consists of a blade and an electric motor enclosed in a frame casing. It is supplied with power and, indirectly (via the ECU), a temperature sensor.

Symptoms of a problem

It is not difficult to identify a problem with the fan - if it does not work, then the antifreeze quickly heats up. The on-board computer receives a corresponding signal and an indicator flashes on the dashboard, informing the person behind the wheel about a critical situation.

In this case, the driver is obliged to turn off the power plant and wait until it cools down, and only then move away, taking all precautions.

Operating a vehicle with a faulty cooling system is very dangerous. A non-working fan, especially in the summer heat, can cause very serious damage. As a rule, the cylinder head is the first to be damaged by overheating.

It’s easy to confirm a refusal:

• turn the car on to idle speed;
• open the hood;
• wait until the antifreeze warms up.

If the electric motor of the fan is not going to work, then turn off the injection engine and start looking for the cause. Fortunately, repairing a key element of the cooling system is not very difficult. We will tell you further how to find the problem and fix it.

Why the fan may not work

The signal from the control unit indicating engine overheating cannot be ignored. The faster you repair your cooling, the lower the risk of other breakdowns.

There are several main reasons why the fan stops working on a VAZ equipped with an injector. We are talking about:

• relay failure;
• broken wiring;
• fuse blown;
• poor contact in the pads;
• failure of the electric motor of the fan itself.

First of all, it is necessary to check the functionality of the blower. It's easy to do:

• disconnect the power connector from it;
• connect the terminal directly to the battery (the current is constant, but polarity is not necessary).

If the unit works, then the problem must be looked for in the electrical circuit, but when the problem is not resolved, it means that the electric motor is clearly faulty.

Electric circuit

So, you have made sure that the propeller itself is spinning, that is, the directly connected motor is working. In this case, it is necessary to do the wiring, inspect all connecting blocks and terminals for poor contact.

The first thing you should pay attention to is the fuse. A 20 ampere protective device is installed on the VAZ injector discussed in this article. It is not difficult to find it - look in the block located under the hood - the one designated as F4 is responsible for the fan. In fact, the device rarely burns out, since it does not experience constant high loads. It is very simple to make sure that the element is in good working order - turn on the ignition and press the horn. The signal is also fed through F4, and therefore, if it burns out, you will not receive sound.

Relay

On a VAZ model 2114 equipped with an injector, the relay may also fail. It is located near the fuse.

The test is carried out by replacing the electromagnetic device with a known working one. If this measure does not help, then the search for the problem continues.

temperature sensor

Now you need to check the temperature sensor on the VAZ. When it does not work, the fan operates in emergency mode, that is, constantly.

The check is carried out like this:

• remove the power connector from the sensor;
• turn on the ignition.

The blades spinning non-stop indicate that the temperature control device has failed. It cannot be repaired - buy a new one and replace it.

Broken fan

When the cooling system element in question shows no signs of life, many simply buy a new one, but this is not at all necessary. Most often, failure occurs due to abrasion of the electric motor brushes or bearing wear. Both are sold separately and can be easily changed.

It will not be possible to save the old fan of your VAZ when it has a short circuit or the winding wire has broken. Eliminating these breakdowns is impractical.

The cost of a new cooling unit is relatively high. The cheapest one sells for 1,500, and the most expensive option costs 2,500.

Professionals usually charge between 400-500 rubles for replacing a fan. But, fortunately, those who wish will be able to repair their own VAZ without resorting to their services, since the procedure is not particularly complicated.

How to change

To replace a cooling fan, you will need a working assembly, as well as:

• Phillips screwdriver;
• 10 and 8 mm socket wrenches.

First of all, put your injection VAZ-2114 on the parking brake. Additionally, secure the wheels with stops, as required by safety regulations. Then proceed as follows:

• open the hood;
• remove the negative wire from the battery;
• unscrew the bolts holding the air filter in place;
• using a screwdriver, slightly loosen the air duct clamp (it is located near the mass air flow sensor);
• dismantle the corrugation by unscrewing it from the air filter, and then remove the last unit;
• remove the air intake by first tightening its bolts with an 8 mm wrench;
• Once you have full access to the fan, disconnect its casing (it is held in place by 6 nuts);
• unplug the power connector;
• remove the faulty element from the engine compartment;
• put a new one in its place.

The assembly process is carried out in the reverse order described above.

Functionality check

After the replacement is completed, you need to make sure that the new unit on your VAZ-2114 injector is functioning properly. For this:

• start the engine;
• leave it idling;
• wait until the antifreeze heats up and the forced cooling works.

As a rule, this happens approximately 5-7 minutes after starting the engine. Now you need to make sure that the fan turns off on its own.

Sometimes car enthusiasts are faced with a situation where a new, newly installed unit does not work. Most often this happens for a trivial reason - you were foisted a defect in the store. If something is wrong, then you will have to repeat the check of all elements responsible for forced cooling of the engine in the manner described above.

As you can see, troubleshooting problems associated with a non-working fan on your own is not a particularly difficult task. If you are not confident in your own abilities, then we recommend not to experiment, but to contact a workshop.

What to do if the VAZ-2114 injector cooling fan does not work

It should be noted that if the car is moving at high speeds, there is, of course, no particular need for a working fan. But as soon as the speed of the car decreases, and also when the car is idling, you simply cannot do without a fan.

This device turns on automatically as soon as it receives a signal from the electronic control unit. This signal is based on data received from a temperature sensor, which is triggered when the coolant temperature rises to 103 degrees.

Finding possible causes of fan malfunction

The search for possible reasons why the fan on the VAZ-2114 does not work must first begin with the fan itself.
To do this, disconnect the fan connector and connect it directly to the battery terminals, while maintaining the polarity. If the fan starts working, it means that it is fully operational and the reason lies in something else. But if the fan still does not turn on after the above manipulations, you should check the condition of the sensor contacts and whether the wiring is intact. If in this case everything turned out to be fine, it’s time to check the fan relay and fuse. Both of these parts are located under the hood of the car, closer to the driver's side in a special mounting block.

It should be noted that fuses 20A and F4, responsible for the fan and sound signal, are double on the VAZ-2114. Therefore, if the reason for the fan not working lies precisely in the fuse, then the sound signal will not work. You can check the functionality of the fuse using the most common automotive tester.

But, unfortunately, you will have to tinker with the relay.

In order to confirm or rule out the relay problem, you should acquire a similar device that has been tested for performance. You need to temporarily install it in place of the old one and check whether the fan starts working. If in this case a miracle did not happen, we move on to inspecting the sensor.

After de-energizing the sensor, the fan should start in emergency mode and provide constant airflow. To do this, disconnect the sensor from the connector and turn on the car ignition. If the fan finally starts working, this indicates a sensor malfunction. The latter, by the way, cannot be repaired, which means it can only be replaced.

Electric circuit

So, you have made sure that the propeller itself is spinning, that is, the directly connected motor is working. In this case, it is necessary to do the wiring, inspect all connecting blocks and terminals for poor contact.

The first thing you should pay attention to is the fuse. A 20 ampere protective device is installed on the VAZ injector discussed in this article. It is not difficult to find it - look in the block located under the hood - the one designated as F4 is responsible for the fan. In fact, the device rarely burns out, since it does not experience constant high loads. It is very simple to make sure that the element is in good working order - turn on the ignition and press the horn. The signal is also fed through F4, and therefore, if it burns out, you will not receive sound.

When do you need to change the fan on a VAZ-2114

If the reason for the non-working fan lies in the fan itself, you can still try to repair this part.
As a rule, the problem lies in the bearings. But sometimes it also happens that due to a break in the windings or a short circuit, the fan motor itself fails. If this happens, then it is better not to try to repair anything, but to replace this part. By the way, driving a car with a non-working fan is strictly prohibited. As a result of this action, the coolant can warm up significantly, which will lead to complete destruction of the pipes and rubber hoses. Driving a short distance with the fan not working can also cause the cylinder head and valve cover gaskets to fail. But that's not all. Overheating of the engine can also destroy some elements of the piston group.

Simply put, a non-working fan (its cost, by the way, is not that high) can cause much more serious problems, the elimination of which will entail significant material costs. On average, the cost of a new fan for a VAZ-2114 varies from 1.5 to 2 thousand rubles. Replacing it at a service center will cost another 500 rubles. But replacing all the above parts and gaskets can cost more than tens of thousands.

Other reasons for backlight failure

Sometimes the instrument panel stops lighting for other reasons. The most common of them are the following:

• Burnt out light bulbs or LEDs. To determine the failure of the lamps, you need to remove the device, but this will not be easy. Faulty lighting fixtures, like fuses, cannot be repaired. They need to be replaced. If the light bulbs burn out frequently, it is advisable to check the car wiring with a multimeter within a reasonable time or contact an auto electrician. Often the reason for this is unqualified replacement of conventional lamps with LEDs;
• The dashboard contact board is burnt out. Due to excessive wear or frequent voltage fluctuations in the on-board network, it may fail. The part consists of microcircuits. It is almost impossible to diagnose and repair it at home. Therefore it will have to be changed. The fee costs about 400-600 rubles. To replace it, you will have to disassemble the dashboard;
• Broken wiring. Damage may occur in one or more places. To identify the defective area, you need to test all the wires with a multimeter. Sometimes this takes several hours. Without a good knowledge of electrical circuits and auto electricians, it is often difficult to determine this malfunction. Sometimes the dashboard may not light up due to oxidized or dirty contacts. Cleaning the contact connections will help restore the functionality of the part. In rare cases, the problem is caused by other faults.

Operating a car with a non-lit instrument is not prohibited by law. But driving with such a breakdown is inconvenient and uncomfortable, since in the dark the instrument readings are not visible, and there is no information about the condition of the car. Therefore, such driving is risky. In addition, this may be accompanied by other, more serious malfunctions. They often prohibit the use of the car. Therefore, it is recommended to diagnose and fix the problem within a reasonable time. Luckily, you can usually do this yourself. And only a wiring break requires the intervention of an electrician.

The fan on the VAZ 2114 does not work - how to fix it? Pro Tips!

Overheating of the engine leads to serious problems: the pistons may jam, the cylinder block gasket may break, which leads to the need to overhaul the engine. To protect the power unit from overheating, it is important to maintain stable operation of the cooling fan. In this article we will discuss the operating principle of the device, its connection diagram, independent diagnostics and repair, as well as modernization of the control circuit. The instructions are fully suitable for VAZ 2115 and VAZ 2113 cars.

OPERATING PRINCIPLE

A fan is a device that allows you to increase the efficiency of a cooling radiator. The radiator takes heat from the engine and releases it into the air. This process is accelerated by blowing through the blades of an electric fan.

The coolant flows through a closed, sealed system. Its task is to remove excess heat from overheated engine parts. Hot antifreeze flows into the radiator, is cooled here and returns back. While in the radiator, the coolant passes through a system of thin tubes. The incoming air flow while the car is moving helps to quickly remove excess heat from the engine compartment.

But when the car is stuck in traffic or idling, the air flow stops cooling it. In this case, the cooling system may not cope with its task. An electric radiator fan is designed to create air flow artificially. The temperature for turning on the fan on a VAZ 2114 is 85 degrees Celsius.

Having received a signal that the permissible temperature value has been exceeded, the sensor starts the device’s operating mechanism. An artificial air flow is created that removes heat from the radiator. The mechanism operates until the temperature level drops to an optimal state.

The thermal switch then receives a signal that the normal temperature has been reached and turns off the fan.

The device consists of four plastic blades that are mounted on the EDF shaft. A special controller regulates the automatic operating mode. The thermostat is equipped with a solid filler that is sensitive to temperature changes.

There are main and additional valves. When the temperature reaches 85 degrees Celsius, the main valve opens.

WHERE IS THE FAN RELAY LOCATED?

It is located in an additional block.

4 – electric fan relay;

5 – electric fuel pump;

6 – ignition relay.

Relays and fuses may have a different order. Therefore, you need to focus on the color of the wires. The main relay is always located at the bottom. Find the relay that has a thin pink wire with a black stripe coming from it. It comes from the main relay through pin 85. Be careful! Do not confuse this with the red thin wire, which also has a black stripe and extends from the controller. And find a thick white wire with a black stripe (pin 87). This is where the cooling fan relay is located. There is always a fuse next to it. It is an element of the chain.

Connection diagram

Knowing the electrical diagram for turning on the radiator fan, it will be easier to find problems in its electrical circuit.

The cooling fan has 2 inputs: the first input leads to the generator through fuse F5 and the connection busbars in the mounting block (2). The harness block (3), nicknamed the chip by drivers, connects the electric fan via a relay to the injection controller connected to the ignition relay. From the wire coming from the controller, a branch leads to an auxiliary relay with a fuse.

COOLING FAN DIAGNOSTICS

If signals appear on the dashboard indicating that the permissible temperature level in the cooling system has been exceeded, this may indicate that the fan on the VAZ 2114 is not working. The main symptom of the malfunction is that the mechanism does not start even with a significant increase in temperature. It is urgent to turn off the engine to prevent its elements from overheating.

The engine should not be operated with a faulty electric cooling fan. This may damage the cylinder head.

If the cooling fan on a VAZ 2114 does not work, the following malfunctions may be the cause of the breakdown:

• The fan switch sensor on a VAZ 2114 has failed.
• Lack of contact at the sensor connector.
• The wiring has broken.
• Electric fan relay faulty.
• The fuse has blown.
• Damage to the device's electric motor drive.

Unplug the device. Connect it to the battery terminal. Maintaining polarity. If a direct connection to an energy source starts the electric motor, then the drive is working. There may be problems with the wiring, the fuse, or the temperature sensor.

Now it’s time to diagnose the fuse. You don't even have to open the plastic box to do this. If the relay malfunctions, the horn stops working at the same time as the fan. Therefore, if you notice the loss of the sound signal, it means that the fuse has definitely blown. You can find it in the engine compartment in a small plastic box. We release the cover, pressed by two latches, take out the burnt fuse with tweezers and replace it with a new one.

But diagnosing a relay is quite difficult. Especially for those who are exclusively “you” with auto electrics. To check functionality, the easiest way is to find a working relay and temporarily install it. If, after installing a new device, the fan begins to work properly, then it is time to replace the old one.

To diagnose the temperature sensor that supplies a signal to the radiator, you need to disconnect the connector from the sensor and start the ignition. The emergency mode will start, in which the electric fan will start blowing. If the fan starts late when the connector is disconnected, the sensor is most likely faulty. Replacing it will take no more than five minutes. You just need to unscrew two bolts using a Phillips screwdriver and install a new device in its place.

Even if a malfunction has occurred in the VAZ 2114 fan itself, this does not mean that it is time to change it. Sometimes you can simply replace a damaged bearing or brushes. But if the electric motor is faulty, it is much easier to purchase a new mechanism.

Symptoms of a problem

It is not difficult to identify a problem with the fan - if it does not work, then the antifreeze quickly heats up. The on-board computer receives a corresponding signal and an indicator flashes on the dashboard, informing the person behind the wheel about a critical situation.

In this case, the driver is obliged to turn off the power plant and wait until it cools down, and only then move away, taking all precautions.

Operating a vehicle with a faulty cooling system is very dangerous. A non-working fan, especially in the summer heat, can cause very serious damage. As a rule, the cylinder head is the first to be damaged by overheating.

It’s easy to confirm a refusal:

• turn the car on to idle speed;
• open the hood;
• wait until the antifreeze warms up.

If the electric motor of the fan is not going to work, then turn off the injection engine and start looking for the cause. Fortunately, repairing a key element of the cooling system is not very difficult. We will tell you further how to find the problem and fix it.

HOW TO REPLACE

If you are convinced that the cause of the malfunction lies in the fan motor, then the easiest way to carry out repairs is to completely replace the device. In this case, there is no point in spending money on a new casing. It will be cheaper to just buy a new electric motor.

Necessary tool

No special tool is needed. The work is carried out simply using 8 and 10 socket wrenches and a Phillips screwdriver.

Step-by-step algorithm of work

You can replace the cooling fan motor without removing the radiator.

1. Disconnect the connector and device wiring harness from the casing.

2. Unscrew the mounting bolts using a 10mm wrench.

3. Unscrew the lower fastening nut.

4. Using a 10 mm socket wrench, unscrew the mounting nut from the radiator.
5. Using a size 8 socket wrench, unscrew the two pressure plate nuts.

6. Remove the plate.

7. Remove the electric fan along with the casing.

8. Let's start dismantling the electric motor. Using a 10 mm wrench, unscrew the three mounting nuts and remove the engine along with the blades.

9. Using a screwdriver, pry up the lock washer.

10. And take it off.

11. Remove the impeller.

12. Put the impeller on the new motor. Make sure that the shaft pin fits into the impeller groove.
13. Reassemble in reverse order.

What causes heating system breakdowns?

Blown fuse

It would seem like a primitive malfunction - you just need to replace it with a new one. However, this problem has a “second bottom”. The fuse clearly deteriorated due to a short circuit in the system. You will definitely need to find it later.

A little about fuses

In total, there are 2 fuse blocks in the car: the first one is on the left side under the hood, the second one is in the passenger compartment under the panel. Both of these devices affect the operation of certain devices.

Which fuse is faulty will be indicated by a non-functioning device, for example, a windshield wiper. To get to the faulty fuses, you need to remove the block cover while simultaneously pressing the special latch.

As we know, there are two fuses, and only one of them is faulty. With good vision, an attentive driver can easily distinguish a burnt-out part from a intact one. In the core of the part on the blown fuse, the contact line will be interrupted, but for the adjacent, serviceable part, it will be continuous. If you can’t determine it offhand, then you can leave the fuse in place and at the same time turn on a non-working circuit, for example, dimensions. If there is voltage on one side and not on the other, the fuse is faulty and has burned out.

If fuses burn frequently, you should pay attention to the wiring. Most likely, there are serious problems with it and it’s time to contact a competent service

But in our case, with a faulty stove, only one fuse can fail - this is F7. It is he who is attached to the heating system. Its power is 40 A (amps). F7 replies:

• for the stove fan;
• cigarette lighter;
• heat supply to the rear window;
• light in the glove compartment;
• headlight washer (electric motor).

A faulty fuse will cause the oven and all of the above systems to malfunction.

Contact from the mounting block

Also a popular reason why the stove on a VAZ 2114 failed. There may be a faulty wire. In this situation, you should slightly and carefully move the bundle of contacts.

Ignition relay

It can also prevent the heating inside the car from working properly. If there is a malfunction, the relay must be replaced. It is located on the center console.

Ignition relay VAZ 2114

First and second position

If the heater does not work on a VAZ 2114 in the first and second positions of the switch, the driver will have to drive his car for a long time without heating before the long-awaited warmth begins to enter the cabin. The heating system is designed in this way: in the first and second positions, the electric pulse to the fan comes from a resistor, in the third position electricity goes directly.

What kind of part is this, and what problems can occur with it?

For the car's heating system, an additional resistor provides the best speed. It has two resistance coils and two operating modes. When the first mode starts, the electrical impulse goes through two spirals, and in the second mode, along a resistance spiral. You should look for a faulty resistor at the gas pedal. Repairing a resistor is a rare event. It makes sense if the contacts are burnt. The second correctable fault is a melted block, the one with three tips. It needs to be replaced with a new one. They are available for retail sale.

If the resistor is faulty, then the action algorithm will be as follows:

• Remove the contacts from the found additional resistor.
• Disconnect the fasteners from the resistor.
• Remove the resistor.
• Make sure it can be repaired.
• Repair.
• Put it back in place, going through the procedure in reverse order.

Switch

On a VAZ 2114, the heater does not turn on if its switch is faulty.

In this case you should:

• Remove the center console.
• Prepare a lamp with 2 wires.
• Turn on the engine.
• Connect the minus to ground and the plus to the three-phase resistor.

If in this position our lamp shines, it means that the switch is working, and when there is no light, it means that the fuse has blown out or there is an open circuit in the circuit.

It can also cause damage.

HOW TO REPLACE THE TEMPERATURE SENSOR

Before starting work, you need to partially drain the coolant from the cylinder block.

1. Remove the wire.

2. Using a 21 wrench, unscrew the temperature sensor.

3. Take it off.

4. Install the new one in reverse order.

WHAT TO DO IF THE ELECTRIC FAN WORKS CONSTANTLY?

Sometimes another problem arises. Many car enthusiasts are interested in why the fan on the VAZ 2114 is constantly running?

There are four possible causes of the malfunction:

1. a short circuit has occurred in the electrical circuit;
2. the electric fan relay has broken down;
3. The temperature sensor needs to be replaced;
4. The electronic unit is broken.

Most often, the fan starts to work continuously as a result of a shorted wire. The electrical circuit remains on regardless of the signals from the temperature sensor and relay.

To troubleshoot the problem, you need to ring each wire and find the fusion point. Sometimes it is noticeable even upon visual inspection.

If ringing does not help identify the malfunction, you need to check and replace the fan relay. The cost of the device is low. Therefore, for diagnostics it is easier to buy a new relay and install it in place of the old one.

If this does not help, then you need to check the operation of the temperature sensor. After all, it is he who is responsible for turning on and off the electric motor of the VAZ 2114 fan.

If all other elements of the system are working properly, you need to check the electronic module. It rarely fails. If the problem still occurs there, you will have to perform a complete error reset. Sometimes only a complete flashing helps. Not everyone can do this work on their own. Therefore, it is better to seek help from a car service center.

It would also be useful to install a button to force the fan to start and turn off on the VAZ 2114.

This solution can be very useful if the breakdown occurs somewhere on the highway far from the city. In this case, using the button on the instrument panel, you can force the fan to cool the engine.

"Salon" checks

Let's start with what can be examined without leaving the car.

2 fuses are responsible for the normal operation of the fan.
One of them also controls the operation of the beep, so it’s easy to check its viability: honk and listen. There is a sound - we forget about this fuse. No - we climb into the mounting block and look for the one marked F5
(20 amperes). Before putting a fresh one in the place of the burnt one, it would be useful to be curious about why the previous one burned out. Otherwise, the new one will face the same fate as its predecessor in the very short future.

With second fuse

It won't be easy to figure it out. To check it, you will have to dismantle the torpedo casing on the passenger side. 3 relays are hidden under it, accompanied by its own bodyguard-fuse. We need the one in the middle. It is pulled out and checked for integrity. If it burns out, before installing a new one, you will again need to find the cause of the breakdown. By the way, it will be good in this case if you have a spare one (both for checking and for replacing a burnt part).

If this fuse is also working, check the relay adjacent to it. Without an ohmmeter, it is impossible to determine whether it is alive or not; We can only suggest replacing it with a new one (then you need to carry it with you in reserve) and check whether the fan works. In any case, it is worth checking the condition of the contacts on the relay and, if necessary, cleaning them.

If no damage is found inside the car, you will have to get out of it and look for the reasons by opening the hood.

The fan on the VAZ 2114 does not work

How to quickly check the performance of the cooling fan on injection VAZ cars

Now on most cars, radiator cooling fans turn on automatically when a certain coolant temperature is reached. Also, they themselves then turn off as soon as the temperature returns to its normal limits. Yes, there are also “dinosaurs” where the fan operates in constant mode, as it is driven by a drive belt, but such cars are becoming fewer and fewer every day.

So, often a problem may arise with this electrical part on your car, and it stops turning on, which for the car owner can be fraught with consequences: engine overheating and even jamming if the necessary measures are not taken in time.

And the most unpleasant thing in this case

- you can’t just go and check by “pressing a button” whether your fan is working, and you will most likely find out about it only when the temperature suddenly creeps up rapidly, and you don’t hear the fan turning on.

how to find out if it works or not?

How to perform a check on injection VAZ cars

It is quite possible that this can also be done on other cars, but I will not vouch for the result, since I tested it with personal experience only on domestic injection cars VAZ (2109-2115), Kalina, Priora, etc.

To quickly check whether your fan is working or not, just follow these steps:

• open the hood of your car
• turn on the ignition
• we find the coolant temperature sensor (most often it is located on the thermostat housing)
• disconnect the electrical connector from it

DTOZH VAZ
If the fan motor is working properly, it should turn on immediately when you remove the “terminal” from the sensor. If this does not happen, then the fan is faulty.

Yes, you can, of course, remove the connector directly from the fan itself and check everything using the battery power supply, but you must agree that this is a much more labor-intensive process than removing the connector from the temperature sensor.

Engine compartment checks

After getting out of the car and lifting the lid, we proceed to more serious actions.

• The block on which the wires leading to the electric motor on the engine cooling fan are attached is disconnected;
• A pair of loose wires connect the motor to the battery. This will give us a clear picture: if the fan starts spinning, then we have a problem with the temperature sensor, if it remains motionless, the motor has burned out.

In the latter case, everything is clear
- you will have to change (or repair, if possible and have the appropriate skills) the fan motor. When a temperature sensor has failed, you need to avoid making the mistake of many and not confusing it with a sensor that records the temperature of the coolant. The one we need is located above the thermostat, directly on the cylinder head.

Malfunctions of the VAZ 2114 cooling system fan

The fan serves to generate air flows that are directed to the engine radiator. This is necessary in order to cool the liquid that circulates through it.

If the car is moving at high speed, the fan is not particularly required, since the engine receives all the necessary cooling from oncoming air flows. But when the car goes into slow driving or idle mode with the engine running, the role of the propeller becomes indispensable.

Searched device

Switching on occurs after the corresponding signal is sent from the electronic control unit. The ECU, in turn, learns about the need to turn on the fan from the temperature sensor. The switching threshold is 103-105 degrees Celsius.

In the case of the VAZ 2114, the fan (propeller) is located in the engine compartment on the back side of the radiator.

Why doesn't it work

There are several reasons why the propeller may not turn on when the temperature situation requires it:

• The electric motor of the fan, that is, the drive, has failed;
• The fuse broke and burned out;
• Relay failed;
• The wiring is broken;
• The sensor connectors have lost contact;
• The sensor has failed.

Finding the fault

When to change

If the fan itself is the cause of all the problems, it is not necessary to change it, since in some cases it can be repaired. Failures are often associated with bearings or brushes.

If the cause of the breakdown is the failure of the electric motor due to a broken wiring or short circuit, it is not worth the risk of repairing it. It is easier and better to replace the entire drive.

Checking for open circuit

If you drive a car that does not have a cooling propeller, this will lead to overheating of the coolant and destruction of pipes, rubber elements, gaskets of the main cylinder block and valve covers. It is not far from destroying the components of the piston group.

Fuse

Operating a vehicle with a broken fan is strictly prohibited.

Price issue

Before starting to solve the problem of a radiator propeller not working, it is important for many people to learn about the cost of components and labor.

A new element today will cost approximately 1.5-2.5 thousand rubles, depending on the model and region. The cost of replacement at a service station will be from 400 rubles and more. Although it is not necessary to spend money on this, since replacing it yourself will take you no more than half an hour. Yes, and there is nothing particularly complicated here.

temperature sensor

A little theory

Characteristic

The sensor is located in the heater radiator. It is not difficult to determine that this is the one in front of you, since in the radiator it is the only element to which the wires are connected. And if you take a 30 key, then only the sensor has the appropriate fastener size.

Sensors may have different temperature limits. But for the VAZ 2114, switching on occurs at 102-105 degrees Celsius, and switching off occurs at 85-87 degrees. When choosing a new meter, focus on the one that has failed, or purchase one with an on and off indicator of 102 and 87 degrees, respectively

There is a special contact group inside the sensor. When the coolant in the radiator heats up, this group heats up and expands. When the expansion reaches a certain limit, the contacts close, they transmit a signal to the wiring and the fan turns on