What to do if the stove on the Lada Granta does not heat well, how to fix it

If there is quite a strong frost outside, and the interior of your car does not warm up in any way, you should pay attention to the serviceability of the engine cooling system, since the performance of the Lada Granta stove depends on it.

Coolant. The condition of your car’s coolant should be constantly monitored, and not only when the heater in the Lada Granta is not heating well. The normal coolant level should be kept between about and the “maximum” of the corresponding tank.

If the level is too low, problems with the sealing of the entire cooling system may occur. As a result, the pressure inside the system decreases significantly. If this problem is not resolved, then there is no point in hoping that the stove in the Lada Granta will work well.

Thermostat. It may happen that in the thermostat position, in which the coolant circulates in a large circle, the thermostat valves become stuck. This is the reason that in the cold season the coolant is simply not able to warm up to normal temperature and ensure good operation of the stove.

In order to be convinced of the presence of this particular problem, it is necessary, no matter how strange it may sound, to get into a traffic jam.

If the problem is really in the thermostat, then the car will literally begin to overheat in a matter of minutes. And when driving along the highway at a decent speed, the engine, on the contrary, will cool too quickly.

Air temperature regulator damper. If the stove in your Lada Granta does not work well enough, perhaps the reason lies in the functioning of the air temperature regulator damper. And all because the position of the damper directly determines the intensity of the air flow that will pass through the heater radiator, as well as the amount that will enter the car interior, bypassing the radiator.
Heater fan and fuse. It is necessary to monitor very carefully whether the heater fan starts working. If this does not happen, you should check the functionality of the fuse called 30A. It is green in color and indexed F4, located in the additional concentration of power fuses, which is under the hood, not far from the expansion tank.

If it turns out that the fuse is in working order, most likely the stove is not working well or not working at all due to a malfunction of the electric fan motor. You can get to it only through a special hole, which will become accessible after the glove compartment lid is removed. In the case when the fan operates at its maximum speed, but the air still does not flow well into the cabin, the problem lies in the contamination of the cabin filter, which should be thoroughly cleaned, or even better, replaced with a new one.

Resistor block. If the heater fan of your Lada Granta works exclusively at the fourth speed, and at the first three completely refuses to show signs of life, it’s time to pay attention to the resistor unit.

Unfortunately, this part cannot be repaired, so if a malfunction is detected, it will have to be completely replaced. You can get to the resistor block in the same way as to the electric motor.

If a car is, in fact, a second home for you, but only on “wheels,” then, of course, you will not give up on the problem of poor interior heating. Nobody wants to be in a “metal freezing trap” in winter. But this is exactly how you can view a car in which the stove refuses to function. The masters know exactly what to do in this case, but for such knowledge, and even more so for their actions, you will have to pay by taking several large bills out of your wallet with great sadness. We suggest that you do not follow traditional methods of solving the problem, but roll up your sleeves to independently find and eliminate the reasons why the stove in your Lada Granta does not work.

If the heater on your car stops working, you need to check the serviceability of not only the heater itself, but also all other devices included in the heating and cooling system. The failure of any link provokes a failure of the entire system or its individual part. Experienced car owners recommend not to wait for a problem to arise, but to periodically arrange preventive examinations for your “iron friend”, then you can prevent undesirable consequences.

If the stove begins to supply only cold air into the cabin, the following may be the trigger:

insufficient coolant level;
poor thermostat performance;
the damper does not close completely;
a broken fan;
burnt fuses or resistor.

It is for this reason that it is useful to have your entire heating and cooling system inspected.

Restoring the heater

First you need to check the coolant level. It should not be lower than what is indicated by the manufacturer. The manufacturer indicates two critical levels on the expansion tank: maximum and minimum. The liquid should not go beyond these two boundary states. A low level of coolant provokes a decrease in pressure inside the cooling system, in this case it is very stupid to hope for excellent operation of the stove, and accordingly, there is no point in counting on the fact that the cabin will become warm.

As soon as the level drops, the owner must top up the coolant used. Mixing antifreeze and antifreeze should not be allowed. Otherwise, a chemical reaction may occur, causing the radiator to become clogged with sediment. An excessively dirty radiator will interfere with the normal operation of the stove.

If you actually find a dirty radiator, we recommend that you wash it. You can purchase special chemicals, pour them inside the device, and also clean the upper surface of the radiator using such products. Often drivers, noticing a radiator leak, decide to quickly solve the problem. To do this, they go to an auto store where they purchase sealant. Of course, the sealant can be considered as a real “savior” if there is a leak along the way. However, it must be used if other methods of eliminating leaks are not available. The sealant plugs the holes, stopping the leak, but at the same time it also clogs important parts of the radiator, as a result of which its performance decreases.

Sometimes the thermostat fails, or rather, its valve begins to work incorrectly. For this reason, the circulation of the liquid is disrupted; accordingly, it cannot warm up normally and ensure the successful supply of warm air to the car interior. It’s easy to check the version of a failed thermostat. Start the stove and continue driving along the route you need. At this moment, if the thermostat is faulty, the stove will “go on strike” and refuse to heat the interior of your Lada Granta. As soon as you get stuck in a traffic jam or stop on purpose, as if being in forced downtime, you will notice that your stove will simply begin to “boil”. However, having resumed movement, the stove will again begin to cool quickly. Having noticed such “oddities” in your heater, you can be absolutely sure that you need to change or repair the thermostat.

Thermostat has failed

Another reason when the stove on a Lada Grant does not heat well is that the thermostat has broken. How to determine a malfunction, by what signs? When the engine is warm, the antifreeze does not warm up above 76 degrees when the air intake damper is open. In this case, only a complete replacement of the thermostat will help.

The standard thermostat installed on the Lada Grant opens at a temperature of 85 degrees. In automotive stores you can find thermostats that are designed to operate at a temperature of 92 degrees. Therefore, according to theory, the interior of the Lada Granta should become warmer in winter.

Blown engine head gasket

The thing is that the motor is not a monolithic structure; it has a block head and the block itself. They are connected through a special gasket. If this gasket is broken (and this happens, for example, due to poor broaching), then the coolant will go into the cylinders or the muffler ( white thick smoke will come out ). Thus, there will not be enough coolant in the system (possible air pockets) and therefore the stove will heat poorly! It is urgent to change the head gasket, otherwise you can kill the engine through overheating.

These are probably all the main reasons when the stove does not heat well! On a personal note, I would like to note that in most cases this is a thermostat malfunction (about 70%). So the first thing to check is to change it.

Now let’s watch a short useful video.

And that’s all, read our AUTOBLOG.

(
48 votes, average: 3.92 out of 5)

Heater radiator: responsible for heating the interior

It’s hard to imagine a modern car without a standard set of devices and options, thanks to which driving the vehicle becomes as convenient as possible, and staying in the cabin is comfortable and safe. The functions of maintaining a favorable temperature regime in the car are assigned to the heating, air conditioning and ventilation system, which, depending on the situation, can heat, ventilate or cool the air in the cabin. At the same time, one of the key components of the heating system is the stove, which includes a radiator that acts as a heat exchanger. The air entering the car interior is heated by the radiator, and it is heated by the liquid that cools the engine.

"Lada Granta" is equipped with a large number of options, thanks to which driving the vehicle becomes quite convenient

Sensor that measures the temperature in the cabin

It is located in the ceiling of the Lada Kalina, close to the lighting lamp and perceives the temperature regime of the atmosphere inside the cabin. The element can also affect the operating mode of the stove. This occurs by comparing the actual temperature with the parameters set by the driver on the dashboard. Thus, the electronics adjusts the position of the dampers based on the “scanned” situation, and it seems to the driver that the stove has stopped responding to his “requests”. The reason for the disagreement is usually the banal oxidation of the contact group of the sensor, due to which it ceases to function correctly. The solution to the problem is to clean the contacts or replace the component.

How to improve the operation of the stove on the Lada Granta

The masters know exactly what to do in this case, but for such knowledge, and even more so for their actions, you will have to pay by taking several large bills out of your wallet with great sadness. We suggest that you do not follow traditional methods of solving the problem, but roll up your sleeves to independently find and eliminate the reasons why the stove in your Lada Granta does not work.

I solved the problem myself

In the same city I bought an endoscope with a 5-meter cable. It connects to a smartphone. The endoscope has LED backlighting – thanks to our Chinese brothers.

I opened the central air duct, removed the panel lining and inserted an endoscope. I suffered for a long time; I couldn’t get used to the image on my smartphone. I got to the damper that shuts off the cold air, and there I found the reason.

There is a self-tapping screw at the joint. It's unclear where he came from! It does not allow the damper to close completely - a gap remains. As a result, cold air is sucked in.

The following accessories are included with the endoscope:

Hook.
Magnetic.

I attached a magnet to the endoscope; there is a special hole for fixation. I lowered the endoscope, safely hooked the screw and carefully pulled it out.

Then I lowered the endoscope into the air duct again to check whether the damper closed completely. It turned out that there was no gap, everything was closed tightly. The stove began to work well, the cabin became warm. The first reason was the screw, and the second was the slightly open damper.

Features of changing oil in winter in Lada Grant.

What did I want to say with this story? One would like to call our specialists at AvtoVAZ dealer showrooms a bad word! Nobody wants to bother, even if the case is under warranty. Winter is just around the corner, we need to travel somehow. And in a Lada Grant with such a stove you can freeze and get sick, which you wouldn’t want, like many drivers.

5 important procedures on the Lada Grant before frosts

What drivers need to remember in the fall.

If my example helped someone, then that's good. You need to look for reasons and not give up. Surely many of you have personal examples of the reasons for the poor performance of the Lada Granta stove. Share your experience and opinion in the comments, subscribe to the channel.

How to replace a stove motor with your own hands.

Now, before the start of winter, it is important to keep your car warm and cozy. Therefore, there is still time to troubleshoot the interior heater without even contacting dealers. Moreover, there is little they can do.

Cabin filter

The cabin filter is responsible for the frequency of the air ducts, protecting the fans and radiator from contamination. Often, many car owners remove the cabin filter to create a more powerful air flow from the air ducts, which soon leads to contamination of both the air ducts and the radiator with fan.

If there is a weak air flow from the heater, then most likely the cabin filter or heater radiator is dirty.

Poor sealing of heater ducts

The hot air coming from the heater radiator partially exits through the gap, which is located immediately behind the heater fan. To solve this problem, the design can be modified. On cars without a passenger airbag, remove the plug. Then we dismantle the right air duct. We close the gap in the heater housing using sealant or plasticine:

Refinement process on video:

Have you ever encountered a problem where the stove blows cold or cool air instead of hot air? What was the cause of the malfunction?

Source

Extender cap

The expander cap is a reliable element, but it can also fail and impede the circulation of fluid through the system by creating a vacuum. The lid is a valve that opens and closes as necessary to supply the expander with air, which helps prevent vacuum from forming in the system. If the valve jams, a vacuum will be created in the system, which will lead to poor fluid circulation and insufficient heating of the interior.

Engine pump faulty

An engine pump is essentially a mechanical (sometimes electric) engine pump that pumps hot fluid through the system. That is, from the power unit block, through the pipes and further into the radiators for cooling. And in our case, for heating the interior.

It is an “impeller” that is inserted into a metal cylinder through which liquid passes. The impeller rotates, thereby pushing antifreeze (TOSOL) through the system. If there were no pump, then cooling the engine would be extremely ineffective, it would quickly overheat.

Very often, the pump is driven by a belt drive from the crankshaft of the power unit.

The main breakdowns are:

Sometimes the crankshaft belt breaks, the pump does not rotate and does not circulate the coolant through the system. Accordingly, the stove does not heat. However, the engine will also overheat.
The pump itself is jamming. It does not rotate, or the internal part of the “impeller” does not rotate.
Eats the inside. Due to the “crappy” quality of the metal, the internal impeller can be eaten away by aggressive antifreeze or antifreeze. Therefore, purely physically, the pump pulley rotates, but the liquid pumps through the system very poorly. Again, the stove does not heat.

For all reasons, the pump needs to be changed. I’ll say right away that the first “bells” may be a whistling sound in the engine compartment, a hot hose before the pump or heater, but a cold one after.

Signed up with another dealer

I will not name the city in which I again made an appointment with the showroom specialists from AvtoVAZ. The time was set for 8 a.m. to allow enough time for repairs. After lunch they called me and said that everything was fine with the car. This is normal operation of the stove.

I did not agree with them and began to prove that this could not happen. Explained what they did in the previous service. But the masters did not want to take measurements on another car. This was also the end of the matter at the second car dealership.

Lada Granta stove does not heat well reasons

Why and why they install a thermostat from grants, I think there is no need to explain to anyone. When installing it, absolutely all the coolant passes through the heater radiator and, logically, the engine should warm up faster and the interior should become warmer (which is what my 9 lacks in cold weather, which we experience quite often) When the temperature drops beyond -20 degrees, the interior It takes a very long time to warm up, below -30 it’s simply not possible to warm up the interior.

Before replacing the thermostat, I screwed up the heater tap, I thought it was jammed and that was causing poor circulation, but as it turned out, it simply wasn’t there and everything was connected directly before me by the previous owner.

Then I tried bending the damper cable - it didn’t help. Then we’ll go by the method of elimination and start by replacing the thermostat; if that doesn’t help, then it’ll be a radiator, I thought.

So! To carry out the operation we will need:

The damn phone froze and only took a couple of photos, although I photographed the whole process in detail ((It’s a shame. I’ll try to explain the process without photos, describing each step and using photos from the Internet.

1) Turn on music in the garage 2) Carefully pour the antifreeze into a clean container (if fresh) 3) Apply a mark with something sharp (as in the photo) at the junction of the ignition distributor with the engine block, so that you don’t have to look for the ignition later,

4) After unscrewing all the clamps, remove the thermostat, as well as the spacer that is attached to the engine block. It should look like this

5) By tightening one nut against another (counter nut), which remained when removing the spacer, we unscrew the original studs. We clean the contact surface of the thermostat, and then tighten new 80mm studs using the same method.

6) Install the gasket and thermostat. 7) Connect the upper radiator pipe to the thermostat.

We also connect the thinner pipe that goes to the stove to the thermostat. 9) We leave the lower pipe as original, but we put a 32-18-32 tee on it, ideally, but I couldn’t find one and bought 32-16-32. Doesn't flow. We put a connecting tube on the tee, which we cut out from the new pipe and connect it to the pipe that goes to the pump. We tighten all the clamps so that you don’t have to remove the distributor if you suddenly need to change any of the pipes. It should look something like this

Spare parts that should remain after replacement.

All. It is clear that for some this procedure will seem elementary, but not all of us are auto mechanics)). It is for these people that I tried to write this article. I hope this will be useful to someone.

UPD: Frosts showed that installing a thermostat from a grant in my case allowed the engine to warm up faster to operating temperature. Now I’ve given up cardboard altogether, because now, even on the highway and in the cold, the engine keeps the temperature at 90 degrees and a penny.))) But this didn’t make the cabin any warmer, so we’ll dig further...

To be continued. I have already completely removed the panel and heater, but more on that in the next part...

The Lada Granta passenger car, which is considered one of the most affordable in the world, is equipped with a “stove” (or simply a heater) that is standard for VAZ cars. Typically this unit works very well, but problems can still occur. Therefore, if the Lada Granta stove does not heat well, then there must be reasons for this that simply need to be discovered.

Rules for using a standard heating system

The car's operating manual outlines the basic principles of operation of the ventilation, air conditioning and interior heating systems. To quickly warm up, you need to switch the damper to the air recirculation position and the fan speed to the “maximum” position. In this case, the car windows must be closed. You should not drive in this mode for a long time, as this can lead to fogging of the windows.

The main reason for the accumulation of condensation is the difference in temperature inside and outside and high humidity. To prevent the windows from fogging up, you need to warm them up by pointing the heater deflectors at them and dry the air by turning on the air conditioning. However, when the vehicle is driven under heavy loads (for example, on long climbs) with the air conditioning turned on, the engine may overheat, so in such conditions it is necessary to monitor its temperature. Condensation is usually the result of luggage blocking the vents.

Incorrect operation of the ventilation and heating system may be caused by a malfunction of the temperature sensor located in the interior lamp. It is not recommended to drive with the windows open in hot weather with the air conditioning running.

The vehicle's ventilation, air conditioning and heating system creates conditions for normal and comfortable driving in any climate zone. AvtoVAZ engineers developed and implemented a simple and reliable heating concept for the Lada Granta model. But for the system to operate effectively, certain rules must be followed, which will help avoid unexpected breakdowns.

Hello everyone, dear friends, especially owners of the Lada Granta car. If you have come to this page, then you are concerned about the question of why the stove does not heat and blows cold air. Let's try to analyze the main causes of this malfunction.

The engine cooling system is responsible for the efficient operation of the heater, and all the heat that enters the cabin comes from the antifreeze, which passes through the heater radiator. And it would be logical if, if the stove is not working well, we check the operation of the cooling system, as well as the main components of this system. So, let's go.

The first reason, the most common one, is the coolant level. If the fluid level is between the minimum and maximum marks, then everything is in order, but if the level has dropped, it means that the system has leaked somewhere and if this malfunction is not corrected, then firstly you will not have enough antifreeze, and secondly the stove will not work well and blow cold air.

How does a stove fan work?

The main task of the fan is to take air flow from the outside and deliver it to the deflectors.

The fan is activated by a mechanical button, to which a 12 V power supply is supplied. In the Lada Granta version, the fan operates at one of three speeds. The driver selects the most optimal mode depending on the temperature inside the cabin.

Additional resistors Grants

Without resistors, the fan operates at one speed with a stable rpm. There are a total of 3 resistors installed on the board.

When the lever is moved to the first position (three resistors), the fan rotates at the first speed, the very minimum. Transfer to the second position - second speed (two resistors). Transfer to third - third speed (one resistor). The detailed diagram of the stove is shown in the photo.

We carry out diagnostics

If it is cold outside and the interior cannot warm up properly, then you need to check the operation of the cooling system, which has a direct effect on heating the interior.

To do this, you need to open the hood and, with the engine not warmed up, check where the coolant is located.

If its level in the tank is between the minimum and maximum marks, then everything is in order. But, when this level decreases, problems with the tightness of the cooling system are possible, and this leads to a decrease in pressure inside the system. If the problem is not corrected, the stove will not be able to warm the air in the cabin effectively enough.

Thermostat

This is a native Luzar thermostat

Thermostat location under the hood

You can verify the presence of this particular breakdown by the fact that the car, while stuck in traffic jams, begins to overheat very quickly. In addition, when moving along the highway at a stable speed, the engine loses its temperature too quickly, if we talk about the cold season. However, even if these “symptoms” are not observed in your car, this does not mean that the thermostat is working properly. It is quite possible that its defect lies only in tangible problems with the interior heater.

For even more complex cases, you can check the pipes that connect to the heater radiator. Normally, one should be hot and the other just slightly warm. If the second of the pipes is very cold, this will indicate that the stove radiator in your car is clogged.

And for the most extreme situations, when none of the above helps, and there is very severe frost outside, you can simply block the radiator’s air supply with any dense object, such as cardboard or plastic.

If the cooling system of the Lada Granta is working properly, then the reason for the poor operation of the stove may lie in the functioning of the air temperature regulator damper.

Blown-out air temperature regulator (either the slider or the cable with the mechanism to which the regulator transmits tension may be faulty)

The fuse box is indicated by an arrow

Also check whether the heater fan turns on. If it remains motionless, then you need to check the condition of the 30A fuse. It can be recognized by its green color and F4 index (in the picture above). It is located in the additional concentration of power fuses. It is located under the hood, near the expansion tank of the cooling system.

If everything is fine with this fuse, then most likely the problem lies in the electric fan motor itself. You can get to it only through a special hole, which will become accessible after removing the glove compartment lid.

If the fan operates at maximum speed and the air does not flow well into the cabin, then the problem is a clogged cabin filter; it needs to be cleaned, or better yet, replaced.

Resistor block

There are cases when the cooling fan is constantly running, thereby preventing the coolant temperature from reaching operating limits. In other words, the coolant that should heat the heater radiator is cold, and the radiator cannot give off heat.

This problem arises due to the fact that the first Grant models were not equipped with an engine temperature indicator, and the driver started driving with an engine that was not warmed up. This is especially noticeable when trips are short.

Troubleshooting methods

Heating the car interior directly depends on the proper functioning of the engine cooling system, since the air entering inside is heated when passing through the radiator of the Lada Granta stove. It is necessary to check the coolant level in the expansion tank: a decrease in the amount of antifreeze leads to impaired circulation and insufficient heat exchange. This result may also be due to a leak in the valve on the expansion tank plug.

Insufficient heating occurs due to a malfunction of the thermostat or pump in the engine cooling system. The cause of unsatisfactory performance is sometimes an air lock in the heating system. To eliminate it, with the engine warm, remove the heating hose from the throttle valve assembly. Then you need to create excess pressure in the expansion tank - unscrew the cap and blow into it. In this case, coolant containing air bubbles will flow from the removed hose. Similar actions must be performed with the second hose. This operation should be carried out with great care: antifreeze on a warm engine has a temperature of about 90°C, and when removing the hoses you can burn your hands.

The stove stops heating due to a malfunction of the gear motor that controls the damper that regulates the air temperature. Replacing the VAZ 2190 heater gearmotor can be done with your own hands, however, this is a rather labor-intensive procedure that requires professional experience. The part is located under the hood of the car, and to remove it you will need to dismantle the seals, frill, wiper arms and trapezoid. When replacing a nano gearmotor, it is recommended to check its performance by applying voltage to the corresponding terminals from the battery.

Important elements of the stove design are the heater radiator and the fan that supplies air to it. The heat exchanger must not be dirty, otherwise it must be replaced or repaired.