VAZ 2114 heater motor: how to remove the heater fan or replace the VAZ 2114 heater motor

During the operation of the VAZ 2114, the owner may encounter the fact that the VAZ 2114 stove does not work. There can be quite a few reasons. However, in the general list, a common malfunction is a breakdown when the heater itself is normal, but the stove fan does not work.

It also happens that the fan works, but the motor of the heater 2114, etc. makes a lot of noise. In such a situation, the problem can be solved by doing the repair yourself. The main thing is to know how to change the heater motor 2114 yourself. Next, we will look at what to do if the heater fan does not work on a VAZ 2114, as well as how to replace the VAZ 2114 heater motor.

How to remove the VAZ 2114 heater fan or change the 2114 heater motor

First of all, replacing the VAZ 2114 heater motor is usually done when the heater motor is very noisy or has completely failed. So, the heater motor 2114 is located between the engine shield and the windshield (near the mounting block).

Just open the hood and you will find the engine casing. This cover must be removed. Next, you need to clean the space around the housing from dirt and dust so that debris does not get into the air duct when you subsequently remove the heater motor.
The next step is to use a cross-head screwdriver to unscrew the pair of bolts that attach the heater fan housing to the engine shield. After unscrewing the bolts, you need to remove the plus wire, after which the ground wire is unscrewed. These wires are located under the panel (almost in the center of the engine shield).
Next, you can remove the heater motor.
According to the manual, you need to turn it 90 degrees and pull it out, but in practice not everything is so simple and difficulties arise. To make the task easier, you can divide the body into two parts, and then remove one part and the other one by one. The main thing is not to break the latches by carefully opening them. It is also important not to damage the connecting elastic at the back. It is also necessary to remove the layer of sealing foam that is laid between the air duct and the stove body. Let us also add that the heater motor cover is attached to the body using two steel brackets that need to be disconnected in order to replace the heater motor.
These staples must be put back in place when finished, both of them. If you leave only one bracket, tight fixation cannot be achieved, the motor will dangle, make noise, and there will be a hum and a whistle. To remove the motor, use a cross-head screwdriver to unscrew the bolts, after which the motor is removed from the housing. Having completed all the work, assembly is carried out in the reverse order.

Please note that during assembly you need to press the stove body as tightly as possible to the air duct. It is also important to connect the two halves of the housing tightly. This is necessary so that the air flow is dense and intense, without loss.

It’s not difficult to guess that in order to change the stove fan of a VAZ 2115 or VAZ 2114, as well as a number of other similar models, you must adhere to the algorithm discussed above. Replacing the stove fan on a VAZ 2114 is also not particularly difficult and does not require special tools or skills.

Having prepared a new fan, you need to disconnect the terminals from the battery, after which the power to the heater fan is turned off. Then, under the hood, the bolts of the protective casing are unscrewed, and the “minus” of the motor power supply is removed.

We also recommend reading the article on how to modify the cooling system of the Lada Kalina. From this article you will learn why you need to modify the SOD on Kalina, as well as how to modify the Kalina cooling system yourself.

Now you need to unscrew the screws that secure the motor itself. Next, the mount for the stove air intake grille is removed, after which the air intake grille itself is removed.

After completing all the operations, you can remove the motor assembly with the protective casing. Next, you need to disassemble the casing, remove the motor and perform all the necessary work. Upon completion, reassembly should be carried out.

Appearance and location of the stove motor

The device is located in the middle of the so-called torpedo and is a small DC electric motor to which a fan protected by a plastic casing is attached. This motor has three operating modes and is designed to supply warm air to three zones: on the windshield, on the passengers’ feet, or directly into the cabin.

The protective cover has been removed from the motor, the fan is visible

Which VAZ 2114 stove fan to choose

Considering that the original factory heater fan is not reliable, many car owners install analogues. At the same time, some options work quieter, better and longer than the standard part installed on the car.

In any case, according to the catalogs, the original has article number 2108-8101078. This element can be installed on the VAZ 2108-21099, 2113, 2114, 2115 models. If we consider analogues, several positions in the catalog deserve special attention. For example, Fenox HM81002 (part made in Belarus), Master-sport 2108-8101078-PCS-MS (made in Germany). These motors are installed on the car without any modifications.

At the same time, there are also other replacement options that can be installed on the VAZ-2114 after certain modifications: Pekar 2108-8101091 and Luzar 2108-8101091. These solutions are in demand among many VAZ owners, they are distinguished by reliability, high performance and low noise levels during operation at a fairly reasonable cost of the product itself.

Important points

In order for the stove repair to proceed as quickly as possible, and its results not to disappoint the car owner, you should adhere to the rules below:

When removing the old motor, be sure to turn it. If this is not done, part of its fastening may break and get stuck in the torpedo, or more precisely, in the mounting bracket. And getting to the stuck fragment will not be so easy.
When tightening the mounting screws with a Phillips screwdriver, you should not use too much force: they are small, so the threads in their sockets can easily be stripped.

As practice shows, replacing an engine is not particularly difficult even for a novice car enthusiast if he has held a wrench and a screwdriver in his hands at least once in his life. The whole procedure takes 40–50 minutes maximum. The main thing is not to overdo it with tightening the fasteners, and everything will be fine.

Let's sum it up

As you can see, the standard heater fan on domestic VAZ models can be a real problem, since the engine is often noisy and humming. Of course, this affects the comfort when operating the vehicle. It also happens that the motor of the stove 2114 and other similar models completely fails. In this case, the stove does not work, but the interior heater system itself is fully operational.

We also recommend reading the article on how to replace the heater radiator (heater radiator) on a Lada Kalina. From this article you will learn about the features of replacing the radiator of the Kalina stove, as well as how to remove the stove radiator on Kalina.

In such a situation, the only correct solution would be to replace the stove fan with a VAZ-2114. Taking into account the fact that such a replacement is not difficult, you can fix the problem yourself in a regular garage. This means that there is no need to contact the service, since all work can be completed independently in 1-2 hours.

Finally, we note that when performing such work related to the ventilation and heating system of the vehicle interior, it is important to achieve maximum density when connecting individual elements. This will allow you to avoid output losses and obtain good airflow quality and powerful air flow even at low stove fan speeds. For this reason, it is necessary to adhere to the above recommendations regarding disassembly and reassembly of the element discussed in this article.

When does the heater motor need to be replaced?

There are several signs that will tell a car owner that something is wrong with the heater motor. Here are the most common of them:

When you try to turn on the stove, you cannot hear the hum of the motor, and this picture is observed at all three speeds.
The motor supplies air at all speeds, but operates intermittently.
The operation of the motor is stable, there are no interruptions in the supply of warm air, but instead of a uniform hum, extraneous sounds are heard, a grinding sound, which later develops into a piercing creak.

Diagnostics

The primary task is to identify the cause of the breakdown and assess your own capabilities in a specific situation.

Let's start with something simple and move on to something more complex:

We check the fuse (F-7 with a voltage of 30 A), which is responsible not only for the heating system, but also for the operation of: the cigarette lighter, heated mirrors, glove compartment lights, and headlight washers. Therefore, when this fuse blows, all of the above devices refuse to work. If it is working, we move further along the chain.
Turn on the car's ignition and switch the speed control to positions 1, 2, 3 in order. If the fan does not work in any of these positions, we move on.
If the heater motor turns on after the car engine has warmed up, the problem is a faulty ignition relay. Solved by replacing the relay.
If the heater motor refuses to work in any mode, there remains one malfunction - the heater motor itself.

The process of dismantling the fan motor

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For the final verdict, let’s apply “+” directly to the motor by removing the positive wire terminal from the motor. If the motor does not come to life, the last thing you can try is to try to clean the place under the ground mount on the electric motor. Often this place oxidizes and the contact weakens.

Causes of malfunction

Note that the reason that the fan does not turn on is problems with the power circuit. Oxidation of wiring contacts, blown fuse, faulty resistor - all this leads to the cessation of operation of the electric motor. Therefore, if it does not turn on, you should first check the power circuit components. Common problems with the fan motor are the occurrence of extraneous sounds during operation - squeals, rattling, interruptions in operation - spontaneous stopping, difficult starting, etc.

The reason for the appearance of third-party sounds:

Deterioration in the landing bushings into which the electric motor rotor is installed, lack of lubrication in them. Because of this, the rotor becomes loose during operation, which creates increased vibrations and rattling, and “dry” friction is accompanied by squealing.
Interruptions in operation are caused by critical wear of the graphite brushes and contact plates of the rotor. Because of this, the brushes and plates cannot make normal contact with each other, which leads to problems in the operation of the fan motor - it does not spin up when turned on and may stop spontaneously.

Troubleshooting the electric motor of the stove is a problematic process and not always advisable; it is easier to purchase a new fan and replace it.

Connection diagram, resistors and fan relays

In principle, changing a fan is not difficult, but you will have to remember your service in the army and the vocabulary of the duty officer. We have placed the technical characteristics of the fan and its connection diagram on the page, if this will somehow help with dismantling. Just in case, if anyone cannot find the original fan, the engine must develop at least 4200 rpm with a current consumption of no more than 14 amperes.

Whistling and howling can be different at different engine operating modes. This is because the connection diagram assumes the presence of a resistor with a resistance of 0.23 and 0.65 Ohms. One limits the current for low speed, and the other is used to obtain the second speed. But this is a theory.

Disposal of an old electric heater motor most often occurs due to wear of the commutator (after 100,000 km) or short circuit of the armature winding, which will be indicated by a “silent” or difficult-to-rotate shaft, as well as a blown fuse F7.

Equipment operation mechanism

The fan regulates the flow of air that will circulate inside the car.
It has several damper positions, which can be directed towards heating the feet, glass or the passenger part of the cabin. If the system does not work properly and is noisy, the heating process of the VAZ 2114 is reduced to zero. Warm air does not enter the cabin, as a result of which the car remains cold. This problem is especially noticeable in the cold season. In order to understand the reasons, you need to know how the operating mechanism of the heating system works:

1. To supply heat to the interior of the car, it is necessary to adjust the supply of thermal air by closing and opening the tap.
2. Through these actions, coolant enters the radiator, which contributes to the formation of heat. The stove operates at the maximum coolant level with a fully heated motor, which is about one hundred degrees.
3. When the stove switches to different speed modes, the fan speed is regulated.
4. In the car interior there are special partitions with the help of which you can determine the main root causes of failure of the VAZ 2114 stove.

In case of malfunctions, the cause should be sought in the following:

The fuse has failed;

The most pressing reason. A faulty fuse does not work properly, which can be the main reason for the breakdown of the entire heating system of the vehicle. Often the cause of a blown fuse is a short circuit. To determine this deficiency, you will have to fully understand the operation of the safety chain.

Poor contact in the inside of the mounting block;

Poor contact of the mounting block

The main cause of this malfunction is considered to be oxidized wiring. There is a solution to the problem: just reconsider the wires connected in front of the mounting block and replacement may be required.

The ignition relay has failed;

Occurs as a result of a stuck ignition relay. The trouble is revealed simply. In this case, the fan does not work properly and is noisy; its effectiveness is expressed only when the engine is fully warmed up. To eliminate this failure, it is necessary to replace the relay.

Inoperability of the stove speed modes;

It is detected when the fan is operating at maximum mode, which makes noise. In this case, it is necessary to evaluate the performance of the heating resistor. If it becomes unusable, replacement will help. This is the design of the heating system. In modes 1-2, the equipment operates using an additional resistor, and only mode 3 is switched on directly from the battery.