How to change the heater motor on a VAZ 2107

Where to begin

If the fan of the VAZ-2107 stove does not work, it is most likely necessary to change the motor. Replacing the VAZ-2107 stove fan begins with preparing the necessary keys and screwdrivers. It is better to work with gloves.

The first step is to remove the trim from the windshield. To do this, open the hood and begin to remove the trim from the corners: unscrew the fastening nuts. After the nuts, unscrew the screws along the entire length of the windshield.

We remove the seal, being careful not to damage it, and put it aside. Carefully remove the cover. Disconnect the hose from the washer. We will also need to remove the trim and frill, for which we unscrew all the screws under the plastic plugs. We remove the remaining linings and insulation, getting to the heater housing. Next we need to get to the electric motor itself.

How to get to the heater

First of all, to make it more convenient to work, you need to think about additional lighting for the place where you will be replacing the VAZ-2107 heater motor. Unscrew the negative wire from the heater motor. It is screwed on with a nut and it will take some effort to unscrew it.

If the nut is rusty, it is better to first lubricate it with penetrating lubricant. We unscrew it first with a key, and then by hand, trying not to drop the consumables. If there is another nut, unscrew it with a deep head; if not, remove the wire. Remove the clamp from the self-tapping screw. We are looking for another positive wire and disconnect it from the plug.

Now it is most convenient to use a short screwdriver to unscrew the screws securing the heating system box and remove the 4 spring brackets. The bolts in the middle are the longest, so set them aside to screw them into place later.

Let's figure out how to remove the fan of the VAZ-2107 stove. It is necessary to move the housing with the fan to the side. If it falls down, then all the bolts have been removed. If not, look for the remaining screws. The motor is inserted into the grooves and rotates freely. Next, the VAZ-2107 heater electric motor is directly replaced. Usually it is very dusty and dirty here, so we remove all the dust and what gets into this compartment.

Electric heater motor VAZ 2104-2105-2107

Heater electric motor, impeller rotation speed.

Troubleshooting in electric motors of cars 2105, VAZ 2107. Diagnostics of electrical equipment of Lada 2105. Instructions for repairing electrical equipment: ignition systems, starter of Lada 2104. Operation of generator, battery, purifier. Diagram of fret 2107.

Data to check

Shaft rotation frequency when the electric motor is loaded with an impeller at a voltage of 12 V and a temperature of (25±10)°C, min-1 3000±150

Current consumption at the specified load and rotation speed, no more than, A 4.5

Low rotation speed of the armature shaft with impeller, min-1 2200±150

Current consumption at armature rotation speed 2200 min-1, no more, A 2.7

Wiring diagram for the electric motor of the heater fan VAZ 2107
1 - mounting block
2 - heater motor switch
3 - additional resistor
4 - heater electric motor
5 - ignition switch
A - to terminal “30” of the generator

Electric motor ME-255 is a direct current motor with excitation from permanent magnets. Electric motor connection diagram

When an additional resistor 3 is connected to the power supply circuit of the electric motor, the armature shaft rotates at a reduced frequency. The resistor is secured with two spring washers in the heater fan housing. The resistor resistance value is 1.5 Ohm at 20°C.

As a rule, it is recommended to replace a faulty electric motor with a new one. The only possible repair is cleaning the collector.

Parts of the electric motor of the heater VAZ 2104
1 - lock washer
2 - washers
3 - body
4 - anchor
5 - crackers
6 - cover

To disassemble the electric motor, it is necessary to unscrew the screws securing cover 6 and remove it. Then you should remove lock washer 1 from the armature shaft and remove armature 4 from the housing. Assembly is carried out in reverse order.

Checking the technical condition is similar to that described above for the VAZ 2104 windshield wiper electric motor.

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Installing a new part

Installing a new part is not difficult. Replacing the VAZ-2107 stove motor is completed within a few minutes, and the longest part of this work is to put all the bolts in place and connect all the contacts.

We try not to mix up the wires and thread them into the correct holes near the grooves on which the motor itself is supported. During installation, the fan must be level, without distortions, otherwise it will cling during movement and eventually break.

When the new motor is installed, we put it in place together with the system cover. We try on the body and make sure that it fits into place without any effort and stands straight.

We put the brackets and all the bolts in place, install the insulation, frill, wipers and check how the heating works.

If you have a helper, have him turn on the heating system while you hold the heater body. By the sound of the operating system, you will immediately understand whether all parts are installed correctly and whether the installation requires correction. If you are alarmed by any sound or knocking, take everything apart and put it back together.

Connection diagram for the VAZ 2107 heater fan.

The diagram below shows how the stove fan (4) . Power from the battery, through the mounting block (1) , goes to the ignition switch (5) and again goes to the mounting block (1) . In the mounting block (1) it passes through fuse F1 (10 amperes) and goes to the stove speed switch button (2) . Next, power from the button goes either through resistance (3) to the motor (4) , or directly to the stove motor (4) .

The VAZ stove fan will not work if any of its circuit components is faulty. You can determine the reason why the VAZ 2107 heater fan does not work:

There is a fault in the mounting block.
The contacts of the heater fan speed switch are burnt out.
The speed control resistance has burned out.
There is a malfunction in the heater motor itself.

Let's take a closer look at each of the faults.

There is a malfunction in the VAZ 2107 mounting block.

If the stove stops blowing air, then first of all look to see if fuse F1 in the mounting block is intact. Usually, if this fuse blows, then the heated rear window and reverse lights stop working along with the heater. This fuse must be rated 10 amps . No more and no less. If you install a fuse of less than the nominal value, it will constantly burn out, and if you install a fuse of a higher nominal value, it is possible to burn the mounting block. If you have a fuse of a higher rating (as in the photo below), then the likelihood increases that the mounting block has failed and the plus is not supplied to the speed shift button. How to find out, read the next paragraph.

Reasons for replacement

Replacing the VAZ-2107 stove motor occurs for several reasons. Let's look at the most common cases when a new VAZ-2107 heater fan is needed.

A terrible sound with a characteristic screeching sound. If such a squeal appears when the car is warming up, it is better not to lubricate the engine, as many do, but to replace the VAZ-2107 heater fan.
The air does not flow and the interior does not warm up - there is nothing left to do but remove and change the heater motor on the VAZ-2107.
The air flow is very weak.
The interior warms up extremely slowly.

Remember that a well-functioning system will be almost inaudible, since insulation and other materials ideally muffle sound very well. However, if something is broken, you can easily fix it.

How the stove 2107 works

So, the heating system of the VAZ 2107 includes:

heater;
fan;
heater control unit;

From the outside, air enters through the air intake into the casing of the air intake chamber. The camera is located in the engine compartment (in the area under the windshield). The air is then redirected to the heater, where moisture condensation occurs.

An important element is the heater radiator on the VAZ 2107, which heats up due to the circulation of coolant (coolant) in the engine cooling system. In this case, the air temperature changes due to the opening and closing of a special tap (VAZ heater tap), which reduces or increases the flow of heated coolant entering the heater radiator.

By the way, if the car is moving at high speed, the heating system can supply air to the cabin even when the VAZ 2107 heater fan is turned off. The fact is that the air flow from outside is capable of creating pressure in the air supply box, due to which heated air penetrates into the cabin.

The heating system itself is simple. Air ducts can direct heated air to the feet, the driver, the windshield and side windows, etc. You can control the stove, change the temperature, and select the blowing direction using the knobs on the dashboard.

The handle at the top is responsible for adjusting the position of the heater tap. By moving the handle as far as possible to the left, the tap closes completely, and to the right will mean full opening.

The middle handle changes the position of the air supply cover, which allows you to adjust the intensity of the hot air supply. The handle on the bottom allows you to control the dampers of the heated glass air ducts. If you move the handle to the right, the air flow goes to the side windows, while the left position allows you to blow the windshield.

Replacing the VAZ 2107 stove fan with your own hands

Owners of a VAZ 2107 should know how to replace a stove fan with their own hands, because often problems arising in this unit lead to the loss of functionality of the heating system. We will tell you how to remove a non-working fan and perform repairs, and also show the sequence of actions in the video.

If you know how to handle the tool and understand the procedure, you can perform such repairs yourself. To ensure that you can replace the fan of the VAZ 2107 stove with your own hands correctly, we recommend that you familiarize yourself with the layout diagram of the device. This is necessary in order not to disrupt the switching structure.

Basic malfunctions and ways to eliminate them

The most typical malfunctions of the VAZ 2107 stove include:

Air entering the cooling system. This usually happens after the system has been filled with antifreeze. Removing the airlock normalizes the heating process of the interior.
When the heater tap is open, coolant does not flow into the radiator. This most often occurs when water is used as antifreeze. Scale forms in the system, clogging the faucet and impeding the passage of coolant. The problem is eliminated by dismantling the tap and then cleaning or replacing it.
Poorly functioning or failed water pump. If the pump does not pump coolant, this can lead not only to a lack of heating of the interior, but also to more serious problems, such as engine overheating. The water pump does not work, as a rule, when the generator belt breaks, as well as when it jams as a result of wear on the bearings.
Clogged stove radiator honeycomb. In this case, the supply pipe will be warm and the outgoing pipe will be cold. The radiator often becomes clogged when water is used as a coolant, as well as when oil or additive particles enter the system to eliminate leaks. Cleaning or replacing the radiator will help restore normal operation of the stove.
Displacement of the partition in the radiator. If both radiator hoses are hot, but warm air does not enter the cabin, then most likely the partition in the radiator has shifted. The only solution to the problem is to replace the radiator with a new one.

If an oily residue appears on the floor or glass, you should look for an antifreeze leak, which may be:

If a faucet or pipe is leaking, it should be replaced. A leaking radiator can be temporarily sealed, but it will still need to be replaced soon.

Work order

Before starting work, you need to fully read the instructions on how to repair the device. A complete understanding of the process will allow you to act more confidently. The technician must first understand how to remove the fan. First you need to prepare the car for work: remove the gear shift lever, remove the radio and all the blocks with wires. Now you can start working:

To gain access to the device, carefully remove several parts. First you need to remove the shelf on the passenger side, it is secured with 4 bolts.

Now you need to remove the panel with the cigarette lighter, it is removed with a screwdriver, you need to pry the corners one by one until it clicks.

Then you need to dismantle the console with the buttons; it can be easily lifted with a screwdriver and moved upward. This makes the two fasteners located underneath accessible; they need to be removed. Now the part is completely free, it can be removed and put aside.

Also, access to the motor cooler is blocked by air ducts; to dismantle them, you need to pry off the plastic latches with a screwdriver. But you need to understand that the fasteners are made of fragile plastic and must be bent carefully. Access to the bottom of the heater is now open. There are four latches on the stove - two on each side. You can bend them with your fingers or a screwdriver, but be careful - the latches spring strongly and fly off far away.
Now access to the required unit is open, and you can begin to remove the VAZ 2107 heater fan. The electric motor and cooler are secured with two steel latches, one on top, the other on bottom. You can bend them with a screwdriver with a thin and long tip.
The dismantled unit is removed and a new device is installed in its place.
Now you can perform assembly in the reverse order of disassembly.

You can also see the procedure for replacing the stove fan on a VAZ 2107 in this video:

Installation

The new electric drive is installed in the reverse order. Do not forget to check the functionality of the purchased unit before installation. This will avoid unnecessary steps to re-disassemble the heater. Check if the engine is functioning

Fortunately, just connect it to the battery installed on the car directly.

When replacing the fan, it makes sense to also inspect other elements of the heating system of your “Seven”. Make sure that:

there is no damage to them;
the seal is not broken.

Pay special attention to the heater valve and radiator. Timely detection of problems will allow them to be eliminated with minimal expenditure of money and time.

This video will give you a better idea of the process:

Purpose of the heating fan on the VAZ 2107

The main task of the heating fan is to blow on the hot stove radiator and through special air ducts to pump warm air into the interior of the VAZ 2107, heating it. The fan is made of ordinary plastic and is driven by a small electric motor.

The stove fan on the VAZ 2107 is made of plastic and is not very durable

Both plastic and the electric motor are not highly reliable, so car owners have to carefully monitor the condition of these parts so that they do not fail at the most inopportune moment.

Furnace Fan Location

The VAZ 2107 heating fan is located under the central panel, behind the heater casing.

The heating system of the VAZ 2107 is quite complex, so getting to the fan is not easy

That is, in order to get to it, the car owner will have to disassemble the central panel of the car, and then remove the stove casing. Without these preliminary operations, replacing the heating fan is impossible.

Stove design

The stove consists of the following parts:

Heater, a stove radiator is installed in it (indicated by the number 5 in the figure), it heats the air penetrating from outside;
The stove fan, or motor (indicated by the number 14 in the figure), it pumps a flow of warm air into the cabin, it is mounted in a special casing (indicated by the number 16 in the figure) on elastic cushions that dampen its vibration;
The stove control system is a fan button (indicated by the number 18 in the figure), three control knobs for heating modes - blowing onto the windows, taking air from the cabin or from the street, and opening and closing the stove tap.

1, 9 – air ducts for heating the side windows on the left and right; 2 — air duct for heating the windshield; 3 — radiator casing; 4 — air intake cover; 5 — heater radiator; 6 — radiator valve; 7, 8 radiator hoses for supplying and discharging hot fluid from the cooling system; 10 — rotary deflectors; 11 — air duct damper; 12 — air distribution cover; 13 — fan guide casing; 15 — lever of the air distribution cover; 17 — control rods; 19 - central air duct.

The heating system works in the following order:

Air for heating comes from outside, through air intakes on the hood.
Under the hood there is a special box, insulated with a rubber seal, for air flow.
From it the air flow is directed to the stove.
Next, the air is heated by a radiator, which is fed with antifreeze and antifreeze. The degree of heating is regulated by the heater tap. The faucet is controlled by a flexible rod using a control lever.
At high vehicle speeds, air can enter the passenger compartment without the fan being turned on. Therefore, at high speed you can use the stove without additional load on the car’s electrical network. The interior heater is turned on by a fan switch that has three positions - neutral and two speeds: low and high. Speeds are provided by a resistor; it increases the resistance of the circuit and reduces the speed of the fan.
The fan accelerates the warm air flow through the air ducts to the sides, onto the side windows for good visibility of the rear-view mirrors, and into the grille deflectors, which can change the direction of the air flow for better airflow. There is also a flow of warm air through the air duct to blow on the windshield.

Causes and signs of heating fan failure

The list of reasons why a VAZ 2107 stove fan may break is small. Here he is:

breakage of the blade in the impeller. As mentioned above, the furnace fan impeller on the VAZ 2107 is unreliable because it is made of very fragile plastic. To make matters worse, the fragility of this material increases in the cold. Therefore, you should not be surprised that the impeller breaks in the most severe frost;

As a rule, the plastic blades in the impeller of the VAZ 2107 break at the root

If the brushes in the VAZ 2107 motor are worn out, the fan will not rotate

The signs by which you can recognize a breakdown of a heating fan are also well known. Let's list them:

After turning on the heater the fan does not make noise. This means that either the motor is broken, or it is working properly, but the current supply to it is interrupted. This usually occurs due to a blown fuse responsible for this section of the vehicle’s on-board electrical network;
The rotation of the heating fan is accompanied by a loud grinding or crackling noise. This means that a piece of the blade has broken off from the impeller and is hitting the inside of the furnace casing;
The furnace fan rotates with a loud, continuous squeaking noise that gets louder as the speed increases. The source of the squeak is the bushing in the fan. Over time, it wears out, and play appears on the fan, which causes a characteristic creaking sound.

About lubrication of the heating fan VAZ 2107

In short, lubricating the fan on a VAZ 2107 is a pointless task. Now more details. All heating fans on the VAZ 2107, regardless of the year of manufacture of the car, are equipped only with bushing bearings. As mentioned above, the bushing wears out over time and begins to creak piercingly. If the play resulting from wear of the bushing is small, then the creaking can be eliminated with the help of lubricant. But this is only a temporary measure that will lead to nothing, because very soon the lubricant will run out, the play will increase, and the fan will creak again. Therefore, the only rational option in this situation is to replace the furnace fan with a new one. Moreover, it is desirable that the new fan be equipped not with a bushing, but with a ball bearing, which will last twice as long.

Replacing the heating fan on a VAZ 2107

Before starting work, you should select everything you need. Here's what we need:

screwdrivers (phillips and flat);
wrenches (set of open-end and socket wrenches);
new stove fan for VAZ 2107.

Sequencing

First you need to carry out one preparatory operation: remove the gear shift lever. In the VAZ 2107 it creates serious problems when dismantling the furnace fan. Then you should remove the radio from its niche. It is attached with two self-tapping screws. When removing the radio, do not forget about the wires that are located behind it. The device carefully slides out of the niche so that you can stick your hand into the gap formed between the radio and the front panel and remove all the connectors with wires located on the back cover of the radio.

Now, using a Phillips screwdriver, unscrew the shelf located in front of the passenger. It is attached with four self-tapping screws.

The shelf in the interior of the VAZ 2107 is held on by only four screws

To remove the VAZ 2107 cigarette lighter panel, you will have to carefully pry it off with a screwdriver

It is most convenient to unscrew the nuts on the casing of the VAZ 2107 with a 10mm socket

You can only get to the screws under the buttons by bending the panel with a screwdriver

Having removed all the fasteners, it is better to place the panel on the floor, to the right of the gearshift lever

The latches on the air duct of the VAZ 2107 are made of very fragile white plastic

Extreme caution must be used when bending these latches.

It is better to open the latches on the heating motor of the VAZ 2107 with a long and very thin screwdriver

The VAZ 2107 stove fan is freed from the fasteners and is removed together with the motor

Video: independently changing the stove fan on a “classic” (VAZ 2101–2107)

REPLACING HEATER CAP VAZ 2105

Heater valve VAZ 2105

Replacing the heater tap with a VAZ 2105 and other improvements are aimed only at maximizing the operation of the stove. As mentioned above, this replacement is carried out due to the improvement and modernization of the operation of the stove (a ceramic version can be installed) or if the old tap begins to leak. A leaking faucet can cause a lot of trouble for a car owner. Therefore, eliminating the leak will be the only correct solution, and this can only be done by replacing the tap.

Advice. We purchase a heater stove faucet in a store, preferably with two pipes.

It is worth noting that the choice of cranes today is huge. Still, experts and experienced drivers advise buying a ceramic faucet. It has better equipment than the regular one. There are a lot of details in it.

You will need:

Rubber rings.
Fastening nuts.
Washers.
Aluminium case.
Ceramic filling and much more.

Ceramic faucets last much longer than regular metal ones. They practically do not stick like regular ones. We begin the replacement, armed with a jack, spanners and wrenches, sockets and an extension cord. We lift the car onto the inspection hole, which will greatly facilitate the work process.

Let's get started:

take some container and place it under the engine;
unscrew the plug on the block and then drain the coolant;
after this we remove the container, but not far, since it will still be needed;
we find the pipes that go from the engine to the heater tap;

Pipes going from the engine to the tap

loosen the pipe clamps;
take a metal brush and clean the threaded connections of the two studs.

Advice. To avoid problems with loosening the nuts, it is recommended to moisten the connections with brake fluid. After all, studs are not ordinary bolts, but parts whose heads are buried in the plastic body of the faucet.

The fastening nuts on the caps are self-locking and have plastic rings that are difficult to unscrew. Well, if you add corrosion to this, then everything becomes clear.

Let's continue:

remove the pipes while the threaded connections are acidifying (remember that you need to place a container under the pipes, since liquid flows from there);
go to the salon;
remove the side panel of the torpedo;
then we find the pipe clamps;
take a socket wrench with a cardan and unscrew the clamps;
remove the pipes and replace them with new ones;
after removing all the pipes, we climb under the car again;
we find the nuts securing the heater valve;
use a 10mm wrench to unscrew them;
we return to the salon;
pull the tap towards you;
remove the spring clip;
disconnect the control cable from the crane;
We install a new heater valve, first connecting the cable and attaching the valve to the body.

That's all! A new heater valve has been installed. The rest of the assembly is carried out in reverse order.

Important points

When replacing a heating fan on a VAZ 2107, you should remember several important nuances, neglect of which can ruin all the work. Here they are:

When bending the plastic latches on the central panel and on the cigarette lighter panel, there is no need to apply much effort, since these latches are made of the same fragile plastic as the heating fan. They break very easily, especially if repairs are made in the cold;
You need to be very careful when removing the motor after opening the latches. Behind it are wires with terminal blocks. If you pull such a wire carelessly, its terminal block may crack, since it is very thin. It is not possible to find this spare part for sale. Therefore, cracked pieces of plastic will have to be glued together using universal glue. All this can be avoided if you act carefully and slowly.

So, it is quite possible to change the stove fan on the “seven” with your own hands. Even a novice driver who has some understanding of the operation of automobile heating systems can do this. All you need to do is be patient and follow the instructions above exactly.

How to replace the VAZ-2107 heater motor

To begin with, you should understand that the VAZ-2107 car, unlike its other relatives, has a fairly extensive airflow system. This makes replacing the heater motor much more difficult. To complete this difficult task you will need the following tools:

keys for 10 and 7;
Phillips and flathead screwdrivers;
round nose pliers.

Before starting work, it is necessary to remove the instrument panel in the cabin, since without this action there is no way to get to the fan housing. Next, remove the glove box and shelf. Now that all the preparatory measures have been completed, it is time to begin the actual process of replacing the heater motor on a VAZ-2107.

We take the key to 7 in our hands and release the cable casing, which is responsible for controlling the air dampers of the stove, after which we remove the loop from the lever cable. We replace the key in our hand with a larger one, using it we unscrew the nut, due to which the air ducts (right and left), as well as the heater, are held in place. Both air ducts should be removed from the stove body. This is done with a flat screwdriver.

If you notice that one of the blower elements is damaged, it should be immediately replaced or repaired. Using a flat-head screwdriver, remove the latches that hold the fan on the heater radiator.

And only now can the fan be removed from the heater housing. However, before doing this, you should disconnect the terminals from the resistor. To replace the engine, first disconnect the impeller. You will need pliers here. With their help, we remove the locking ring, as well as the adjusting washers. With the naked eye you can see that the impeller is now held on the shaft solely due to a fairly tight fit. Since it was not planned to replace the impeller, it should be removed very carefully so as not to damage it in any way.

Heater removal

After the coolant has drained and the necessary tools have been prepared, you can begin disassembly. It is carried out in the following order:

Remove the negative terminal from the battery.
In the engine compartment, loosen the two clamps that secure the hoses to the heater pipes. When the hoses are pulled together, a small amount of antifreeze will leak out.

Unscrew the screws and remove the rubber seal.

We move into the cabin, unscrew the fastening of the shelf under the glove compartment and remove it.

Remove the panel with the clock and cigarette lighter by unscrewing the screws on the right, left and bottom.

Disconnect the wires from the cigarette lighter and the clock, and then move the panel to the side.

We dismantle the internal cavity of the glove compartment in order to move the right air duct aside and provide access to the heater valve. The left air duct is also dismantled (when the stove is completely removed).

Using a 7 key, unscrew the bolt that secures the crane control cable.

To partially disassemble the stove, you will need to dismantle the lower part of the housing. To do this, use a screwdriver to pry up the metal latches (2 on the right and 2 on the left).

After removing the latches, pull the lower part towards you and gain access to the motor. If repair or replacement work is required for this unit, we will carry it out.

To dismantle the radiator, we take it out of the housing along with the tap.

To completely dismantle the stove, remove the upper part of the body, which is secured with four 10mm wrench bolts.

We unscrew the 2 bolts securing the heater control bracket and loosen the screws that hold the rod mounting brackets.
We remove the remaining part of the stove.

Video: replacing the heater radiator on a VAZ 2107

In most cases, complete removal of the heater is not necessary. As a rule, the radiator, faucet or motor are replaced.

If you are only replacing the radiator, it would be a good idea to inspect the electric motor and lubricate it.

Other actions

Owners of VAZ-2107 cars are well aware of most of the intricacies of repairing their iron horse with their own hands.
Anyone who does not disdain such an activity understands perfectly well that replacing a part in a given car can be much easier than getting to it. Therefore, if you have disassembled almost half of the torpedo, you should take the opportunity and carefully inspect all those spare parts that are in your public domain. It is necessary to pay attention to possible malfunctions that are visible to the naked eye, a violation of the tightness of the same stove, as well as signs of a possible imminent failure of some other spare part.

By conducting such a simple study and discovering, and then eliminating all possible problems, you will save a decent amount of time that you would have to spend in the future on the next disassembly of the VAZ-2107 instrument panel.

At the same time, we should not forget that there are a huge number of service stations where highly qualified specialists can not only detect problems on their own, but also fix them in a matter of hours.

Reasons for decreased performance

In addition to obvious malfunctions due to which the stove does not work or functions incorrectly, there are other problems with the heating system of the VAZ-2107 interior. The main one is a decrease in stove performance.

If the stove heats poorly, then the reason lies in:

Malfunctions of the power plant cooling system (reduced pump performance, stuck thermostat).
Radiator clogged.
Formation of an air lock in the heater radiator.
The air intake damper seal is worn out.

To find the cause of decreased performance, start by checking the heating of the heater radiator. To do this, heat the engine to operating temperature, fully open the antifreeze supply valve to the stove and hand check the degree of heating of the supply pipe before and after the valve and the radiator itself. If the pipeline is hot before the tap, but not after it, the tap is jammed. If the radiator does not warm up, the reason lies in severe clogging of the heat exchanger or a plug in it. If the pipeline does not warm up even to the tap, inspect the cooling system.

If the radiator warms up well, but it is noted that the stove heats worse, then check the functionality of the air intake damper and the condition of its seal. It wouldn’t hurt to check the stove body and air ducts for leaks and cracks.

To ensure that the VAZ-2107 heater heats well, before the winter period check the functionality of the tap, replace the antifreeze (with flushing the system), inspect the control mechanism and the functionality of the dampers.

The VAZ-2107 car was produced from 1982 to 2014. Here are colored wiring diagrams (for the injector and carburetor) with a description of all the elements for various modifications. The information is intended for self-repair of cars. Electrical circuits are divided into several blocks for ease of viewing via a computer or phone; there are also circuits in the form of a single picture with a description of each element - for printing on a printer.

The “sevens”, like most modern cars, use a single-wire circuit for supplying electricity to electrical equipment. The other terminal of the consumer is always connected to the ground of the machine to which the negative terminal of the battery is connected. This solution allows not only to simplify the design of the on-board network, but also to slow down corrosion.

How to remove and replace the heater motor on VAZ-2107, 2105 and 2104

So, dear friends, today we will tell you in an accessible language how to get to the heater motor on a VAZ-2107 in order to replace it or repair it, depending on what forced you to take it out. Let us immediately note that if the heater motor on your seven began to squeal when cold, or squeal, then this will only get worse, the motors from the factory are bushed, lubrication will not lead to anything, it may return you silence for a short time, but not for long, so in this case only replacement. And ideally, replacing the heater with a bearing motor - it certainly won’t squeal. So, first we will need to remove the beard on our seven. First, we remove the gear shift knob, it will interfere with us, and we remove the radio from the shaft and disconnect the connectors. It’s different for everyone, some may not even have a radio.

First, let’s unscrew the shelf, everything is simple here, the action is in three photos:

Then, we disconnect the wires from the clock, the cigarette lighter (for ease of assembly, I would advise marking them), remove the socket to the side and gain access to two nuts, here it will be convenient to use a 10 mm socket wrench

We unscrew the nuts, do not lose the washers, look down where the buttons are. There is a decorative plug on the side that looks at the rear passengers; we pry it off with a screwdriver, and under it we see two screws screwed into the tunnel:

We unscrew them, disconnect the pads from the buttons, the panel no longer holds anything. We move it to the side and gain access to the stove body:

Now, we disconnect the side air ducts and carefully remove them from the latches with a flat screwdriver (the photo shows how they snap into place):

We are interested in the lower and middle parts of the body of the stove 2107, in order to remove them you need to get close to the metal latches, there are only four of them - two on each side, here they are:

It can be problematic to snap them off with your hands, we recommend using a screwdriver, like in this picture:

After the latches are removed (be careful when removing, they may “shoot” and fly away in an unknown direction), the lower part of the stove body can be easily pulled out by hand:

Here we see our motor. The motor itself is held in the lower part of the case, also on two metal latches; we snap them off and disconnect the terminals

and remove our motor from the stove body:

That's all, assembly is carried out in the reverse order, about 40 minutes are spent on everything. By analogy, the heater motor is replaced on the VAZ-2105 and VAZ-2104, the only difference is in the beard itself and its fastenings. A little later we will tell you about the nuances of replacing the heater motor in these and other VAZ models. Good luck on the roads and don’t let your car break down. We will be glad to see you in our VAZ classics club on the forum.

Removing the fan

Using a 7 mm wrench, slightly loosen the clamp of the heater damper regulator drive cable and remove its loop from the lever.

Using a ten key, unscrew the nut holding the heater retainer, as well as both air hoses. The latter are extremely carefully removed from the body of the stove itself. These elements are very easily damaged - if this trouble occurs, the defects must be immediately eliminated or the air ducts must be completely replaced with new ones.

Using a flat-head screwdriver, press out the latches that hold the fan itself to the surface of the radiator. Then the terminals supplying the electric motor are disconnected and only then the entire assembly can be pulled out.