9 main reasons why the stove on a VAZ-2114 does not work and how to fix the problem

Drivers of old Russian cars that are not equipped with air conditioning use a cabin heater not only in winter, but also during rain. High humidity condenses on the windshield, reducing the driver's visibility. If the stove on a VAZ-2114 does not work, then the reason is not necessarily related to a breakdown of the vehicle’s components. In most cases, you can solve the problem yourself.

Heater fan diagram for VAZ 2114, 2115, 2113.

And so, here is a list of all components of the scheme:

1. Mounting block (aka fuse block).
2. Egnition lock.
3. Ignition switch relief relay.
4. Heater fan speed switch.
5. Additional resistors.
6. Stove motor.
7. Rear window heating switch with warning lamp.
8. Rear window heating element.

The scheme works as follows. When you turn the key in the ignition switch (2), its unloading relay (3) is turned on. The unloading relay supplies power to fuse f7 in the mounting block (1). After the fuse, power goes to the rear window heating switch (7) and the fan speed switch (4), which distributes which of the resistors (5) the power will go to next. Output 1 from the switch (4) corresponds to the slowest blowing speed, and output 3 goes directly to the heater motor (6), i.e. highest blowing speed.

Reasons why the VAZ 2114, 2115, 2113 heater motor does not work.

The reasons why a fresh flow of cold air in summer or a hot stream in winter does not come from the air ducts of your VAZ 2113, 2114, 2115 can be of two types:

Let's look at them in more detail.

Mechanical reasons why the VAZ 2114, 2115, 2113 heater fan does not work.

First of all, mechanical reasons include clogging of the air duct.

As you can see in the photo, leaves, branches and other debris get under the casing and clog the air duct of the heater motor. Debris can get into the section with the blades itself and jam the stove fan. Usually before this, a whistle or grinding noise is heard from under the soot space.

Mechanical reasons for the inoperability of the stove motor include jamming of the blades due to improper installation of the stove fan housing. When removing the stove motor, the latches securing the two parts of the housing are often damaged. And if these parts are not firmly fixed to each other, then there will be a gap between them and the air flow that should go into the cabin will fall into this gap. Also, parts of the housing may generally jam the motor blades, then it will not spin at all.

Problems with the heater fan from the electrical part.

In this section, we will consider the circuit to the VAZ heater fan by components.

Fuse.

Let's follow the scheme given at the beginning of the post. If your heater fan does not work together with the heated rear window, then the problem is 100% in the fuse. Check fuse f7 in the mounting block , if it is ok, then use a multimeter to see if the plus is coming to it from the ignition switch unloading relay. To do this, with the ignition on, place one multimeter probe on the fuse and the other on the car body. If everything is in order, look at the circuit from the fuse to the speed switch and the heating switch.

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.

Stove design

When cold air begins to escape from the stove or a leak forms in the device, you must immediately begin work to identify and eliminate the malfunction. To avoid any difficulties when carrying out prevention and repair, it is recommended to study the design features of this unit. The interior heating device consists of the following elements:

• Radiator;
• Pipes designed to ensure fluid circulation in the mechanism;
• The tap required to control the intensity of liquid circulation;
• Special dampers for regulating air flows;
• Electrically powered fan;
• Air supply system to the cabin.

During normal operation of all components, the heated air mass is distributed throughout the system and supplied to the cabin in the desired direction.

Why do problems occur in the heating system?

When the heater on a VAZ 2114 does not turn on, this is a serious problem for drivers at any time of the year, but with the onset of the cold season it becomes especially important. The main reasons why the heating system refuses to work are various reasons, ranging from the electrical system to problems with the pump.

Operating principle of the stove:

1. When adjusting the temperature of the air supply to the solon, it is necessary by opening or closing the heater tap.
2. It is thanks to the tap of the heating system that cooling liquid enters the radiator, which contributes to the formation of heat. The temperature of the coolant with a heated engine reaches about 94 degrees.
3. By switching the stove to different speed modes from the first to the third, the speed of the heater fan is adjusted, facilitating the flow of warm or cooled air into the cabin, depending on the position of the tap.
4. Using panel dampers, you can regulate the air flow exactly in the direction you need.

Knowing the principle of operation of the heater system, you can understand where the cause of problems in the car lies.

Causes of malfunction

As mentioned earlier, failure of the heating system can be due to a number of reasons:

• Electric motor malfunction;
• Insufficient amount of antifreeze in the system;
• Radiator failure;
• Faulty heating tap;
• Broken thermostat;
• Burnt-out BC gasket;
• Reducing pressure inside the system;
• Sometimes the radiator gets clogged;
• An air lock has formed.

After listing all possible types of faults, you should consider the main ones separately in order to better study the problems that are most likely to occur.

Thermostat

First of all, you need to start the motor and check the operation of the fan in each available mode. If no extraneous noise occurs during rotation, you will have to begin repairs. A broken thermostat is one of the most common problems that arise during the operation of a heating system. In this case, the coolant circulating through the circuit cannot reach the optimal temperature. Most often the stove fails for this reason.

Broken tap

The heating system often does not work precisely because the tap is faulty. Sometimes this element simply does not open all the way. This may be due to the following reasons:

• The faucet has become completely unusable and therefore must be replaced immediately;
• The attachment is not functioning properly due to the heater cable located near the pedal assembly not being properly secured or reshaped. To eliminate such

Problems with the cooling system

When the heater on a VAZ-2114 does not work, reasons other than electrical may lie in the coolant circulation system:

1. Airlock. As the coolant cools, air accumulates in the upper part of the radiator. Subsequently, air enters the thermostat and a large circle of coolant movement is blocked. The heater core remains cold. There are many ways to fix the problem. But the easiest thing is to squeeze out excess air from the system. To do this, unscrew the cap from the tank. With the engine running, the cold hose is intensely compressed, causing air to escape into the reservoir. If this method does not work, you will have to disconnect the hose to remove the air lock.
2. Radiator. Few people devote time to maintaining their car, and especially the heating system. The internal space becomes clogged with dirt, which impedes the flow of coolant. The outer multi-cellular surface becomes clogged with dust and foreign objects, which interferes with heat transfer. In this case, only cleaning the radiator and replacing the cabin filter will help.
3. Water pump. Wear of intake blades leads to a decrease in productivity and, consequently, a drop in pressure. Reduced idle pressure is unable to supply heated coolant to the radiator. Only high engine speeds allow you to create the necessary pressure.
4. Low coolant level. An antifreeze level below the minimum provokes airing of pipelines. You just need to add antifreeze to the maximum level.
5. Cylinder head gasket. A gradual decrease in coolant level, intense white smoke from the exhaust system and the smell of gasoline (oil) in the tank indicate a burnt-out gasket. Through the gap that appears, antifreeze enters the cylinders and into the crankcase with oil. Replacing the gasket requires removing a large number of parts.
6. Thermostat. The operating principle of the thermostat is based on the property of a certain metal to change its original shape when the temperature rises. If the element fails, the coolant moves in a small circle without entering the heater radiator. In this case, only replacing the thermostat will help.
7. Faucet. It regulates the flow of coolant, that is, the temperature inside the car. If it breaks, the fluid flow stops. Although it is held on by two screws, it is installed in a hard-to-reach place, under the dashboard, which is associated with certain difficulties.
8. Hoses. Connecting rubber hoses become unusable after prolonged use. They crack and break. Through the formed cracks, the system depressurizes, and consequently, antifreeze leaks, air gets inside, etc.

What to do if the VAZ-2114 stove stops working? The stove and its faucet

A malfunction or poor operation of the interior heater can be caused by the heater tap (if it does not open all the way). How to solve this problem? First, lift the faucet cable. You need to bend it from the accelerator side. To see how tight it is, you can pull it towards you with pliers. If the faucet does not open, it is most likely oxidized. In this case, we change it entirely.

A clogged heater radiator can also cause the heater to not work. Here you need to take this part out and thoroughly blow it with a vacuum cleaner.

Replacement

Replacing a failed unit is not difficult. Follow certain rules and sequence of your actions to achieve the desired result.

1. Disconnect the negative terminal from the battery.
2. Lift the hood and in the engine compartment, remove all the mounting bolts that hold the plastic trim.
3. For now, the overlay can be moved to the side so that it does not interfere with work.
4. Remove the rubber seal, which also has its place in the engine compartment.
5. Remove the protective cover from your heater motor. So you have reached the desired object and can begin replacing.
6. On the sides of the motor are two bolts that hold your fan in place.
7. Now go into the interior and remove the driver's side panel. There is a positive plug located there, which must be disconnected.
8. Next, look for the negative wire. It is held on by one nut, which must be unscrewed.
9. The disconnected wires are inserted into the hole in the body of your car, passing through the rubber seal.
10. Remove the damaged motor. To do this, you need to turn it and pull it out through the right side.

Dismantling the fan motor

Follow the reassembly sequence strictly to avoid mistakes that could lead to even more serious problems.

As you can see, removing the device is not difficult. Having studied the condition of the fan motor, we can draw a conclusion regarding the need to replace it. Sometimes car owners get by with simply repairing brushes or replacing fuses.

Price issue

We advise you to choose a high-quality motor for replacement so that later there are no problems with its performance.

The price depends on whether you buy the motor complete with housing or separately.

The motor itself will cost you about 500 rubles, and for the assembled device you will have to pay about 1000 rubles. Which option is preferable for you, decide for yourself.

water pump

It also happens that the pump is unable to create the necessary pressure in the system. This happens when the heater does not heat up at idle, but functions only at speed. Such signs may indicate a low level of coolant in the system. Most often, motorists install an aluminum pump instead of a standard one. Recently, a lot of fakes have appeared in stores, so be very careful when choosing. To be sure, ask the seller for the certificate included with this batch of products. By the way, some craftsmen install an additional electric pump from a GAZelle.

FAULTY THERMOSTAT

With the thermostat not working, the coolant circulates in a large circle, while bypassing the small circle. The problem of a faulty thermostat is solved radically. It needs to be replaced with a new one. Many drivers, knowing about the low quality of their native thermostats, do not wait for it to fail and replace it with an imported analogue. Thermostats “Vernet”, “WAHLER” and “GATES” have proven themselves well.

It is not recommended to purchase Chinese models. They use low-quality steel, which looks like stainless steel. Such a device will not last long.

1. Before starting work, you must drain the antifreeze. To do this, remove the protective cover. Place a container for antifreeze under the drain hole and unscrew the lid. Be careful. If you have just arrived, the liquid may be heated to 70 degrees or higher. Don't get burned. And best of all, let the engine cool down. And one more small note. Cover the generator to prevent liquid from getting into it. To do this, you can make a simple device from a plastic bottle. When you are sure that the coolant flows strictly into the placed container, you can unscrew the cap on the expansion tank. Wait until all the antifreeze drains out, close the drain caps on the radiator and expansion tank.
2. Now we will get to the culprit of the cold stove. First you have to remove the air filter. To do this, you need to unscrew the screws and loosen the clamp that holds it.
3. Loosen the two clamps connecting the hoses to the thermostat and remove the screws holding the thermostat. Now you can remove it.
4. You definitely need to clean the mirror with a stationery or other knife and wipe it with a rag.

Installing a new thermostat is done in the reverse order.

1. The new thermostat is installed in its place and secured with screws.
2. The hoses are connected and secured with their own clamps. But before putting on and securing the hoses, they must be checked for serviceability. If they are worn out, it is recommended to replace them.
3. Before adding antifreeze, check the drain cap on the radiator and expansion tank to make sure they are closed.
4. Remove the pipe on the throttle body heating.
5. Now you can fill the coolant into the expansion tank, slightly above the level.
6. By pressing on the nozzle, you expel excess air from it, but do not forget to place a dish under the hose. Antifreeze will leak into it. Secure the pipe in place with clamps, pour the leaked liquid back into the tank, and close the lid.
7. Install the air filter and secure the protective cover.

New thermostat
Here are a few more reasons why the fan does not work:

• Air in the radiator can cause the engine to overheat and the cooler not to turn on. To get rid of air pockets, you can simply remove the pipe from the throttle body, as you did when you changed the thermostat.
• A clogged radiator also leads to similar consequences. Therefore, the radiator grille must be blown out using a compressor or pump.
• The operation of the heater fan can be affected by low antifreeze levels. This is easy to check. If the coolant level in the expansion tank is significantly below the mark, it must be topped up.

Coolant level

As for the low level of antifreeze, here things are much simpler. If the antifreeze level is not at the maximum level (and this should not be the case in winter), add coolant slightly above the MAX mark.

Sometimes the coolant may smell like gasoline. If so, you most likely have a blown head gasket. In this case, it needs to be replaced. It is inexpensive, and the replacement itself will not take more than 10 minutes of your time. The gasket itself serves in different ways - from 10 to 40 thousand kilometers, depending on the manufacturer and the operation of the car.

If the stove does not work, the VAZ-2114 needs to be checked for clogging of the cabin filter. It comes off very easily. The service life of this element is about 10-15 thousand kilometers. If you have not changed it during this period, most likely the reason lies in a clogged filter.

Blown cylinder head gasket

Ineffective operation of the stove may occur due to a burnt-out cylinder head gasket. The cause can be determined by certain signs:

• the coolant smells like a mixture of gasoline and exhaust gases;
• the smell of antifreeze appears in the engine oil;
• White thick smoke comes out of the muffler.

The appearance of white smoke cannot go unnoticed, so when this sign appears, you need to check and replace the gasket.

The electric motor is actively involved in the operation of the stove; it often breaks down and burns out. Replacing it with a new element is not in all cases the only solution to the problem. There is a possibility that the motor has not burned out, then it can be repaired. You need to check all operating modes of the stove and make sure that the ignition relay is working.

In order to avoid problems with the stove in the future, you need to periodically disassemble and clean the radiator and pipes, change the filter on time, add antifreeze, securely fix the tap, and then your stove will reliably delight you with warmth.

Ignition relay

If the stove “glitches” from time to time (it turns on only when the engine is warm), then the problem is in the ignition relay. It also happens that the fan does not work due to poor contact in the mounting block. Oxidized or poor contact, along with fuses, is a very common problem when operating a heater. Here we need to move the block of wires that go to the block a little or check the quality of the contacts.

The fan also breaks through the resistor. This is easy to understand - the stove will turn on only in the 3rd position of the lever. In this case, we change the additional resistor completely. So, we found out why the VAZ-2114 stove does not work.

Choosing a new heater radiator

New cars of the VAZ family are equipped with heat exchangers from the Dimitrovgrad Automotive Component Plant. Their production uses technology from the French company VALEO (SOFICA).

The original heater radiator produced by DAAZ has small honeycombs

When purchasing a new radiator, the first things to consider are:

• frequency of installation of transverse plates;
• strength and rigidity of the plates;
• the presence of plastic swirlers in round aluminum tubes.

DAAZ radiators differ from their analogues in their tiny honeycombs, in which the transverse plates are located at a very small distance from each other. Due to this, the air remains in contact with the core for a long time and heats up more. The high rigidity of the plates does not allow them to deform under light impacts.