Very often, we remember about such a unit as a car stove only with the arrival of the cold season. There is nothing strange in this, because every driver dreams of the interior of his favorite car to be comfortable and warm. In some cases, the stove heats up badly, and so much so that there is no sense in turning it on.
Another significant problem that a car owner may face in winter is severe frostbite on the windows. How to warm up the interior if the stove does not work? Why can there be problems in the operation of the interior heating system? First of all, you need to understand how this important system functions.
The stove cannot perform its functions normally if one of the system elements is faulty. The design of the heating system is not complicated. It consists of a radiator, pipes, air duct, as well as a device for adjusting the coolant circulation, air dampers and a fan. If one of these parts malfunctions, the stove may already refuse to work normally.
Most popular problems
Common causes of stove malfunction:
- Damage to the main cylinder block, as a result of which the heating system is drawing in air.
- Air ingress into the heating system at.
- A clogged stove radiator significantly reduces the efficiency of its operation. Typical causes are leaves, insects, sealant or even dust. Difficulties may also appear as a result of the ingress of low quality antifreeze or water.
- If, while driving at high speeds, the heating system does not work efficiently enough, and at low speeds there are no problems, the culprit may be a stuck thermostat that does not close.
- Another factor is the contamination of the cabin filter.
- Failure of the stove fan. Brushes or bearings may break. There are also problems with electronic stuffing.
We have listed the most well-known factors that can lead to the stove in the car not working. It is also worth mentioning that the stove does not heat well even if there is damage to the radiator flap. In such situations, the heart of the problem is lack of air.
I would like to pay special attention to factors that can lead to the fact that the stove does not heat well. So, typical problems in domestic VAZ cars:
- Operational wear of the heater valve lever. Sometimes the lever just sours or the rubber elements dry out. The solution to the problem is to replace the lever and radiator.
- Breakage of the upper pipe. This element of the heating system has a specific location, due to which it is quite easy to damage it. It is impossible to repair the branch pipe; you will have to change the part.
- Damage to the stove control unit, which is also called the heater controller. Typically the symptoms of this problem are poor fan performance in the first two regulator positions.
- Failure of the temperature sensor located in the passenger compartment.
Regular diagnostics and maintenance is the key to success
In order to avoid problems in the operation of the stove, we advise you to adhere to a few simple recommendations. With the help of them, you will be able to maintain the performance of the heating system for many years of vehicle operation.
- Regular inspection and cleaning of radiators. The external radiator is cleaned with compressed air or water. But for cleaning the internal radiator, a regular vacuum cleaner is quite suitable.
- The use of poor quality leads to the formation of build-up in the pipes. To clean the radiator, it is necessary to swap the lower and upper pipes, and then start the car engine. For cleaning it is recommended to use special washes and citric acid. To avoid recurrence of the problem, we recommend changing the coolant at least every six months.
- A breakdown of the thermostat is "treated" only by replacing the part. The jamming of the thermostat in the open position leads to the fact that the stove starts to heat poorly, and the car itself will have to be warmed up much longer. If the thermostat sticks in the closed position, the car engine overheats.
- If the stove heats up quite normally, but the air flow is not strong enough, the problem is solved.
- The ingress of air bubbles into the heating system also leads to a deterioration in the operation of the stove. First you need to turn off the engine and open the plug on the expansion tank. Then we are looking for a hose connecting the tank and radiator and try to pour the coolant on our own. If you cannot solve the problem, you need to start the engine and wait until it runs idle.
- Do not forget to lubricate the bearings on the heater fan from time to time.
- The stove in the car does not heat up even in the event of a malfunction of the heater flap controls. For example, a stove tap or a cable may come off.
In order to prevent the appearance of problems with the operation of the stove, we advise you to regularly carry out preventive maintenance. Thanks to this, you can be sure that the heating system in the car will work properly even in the most severe frosts. Remember that the stove, like all other elements of the car, tends to wear out, so you should not neglect its diagnostics. And this applies not only to vehicles of domestic production.
Hello everyone, as you have already noticed, winter is approaching. And I really don't want to ride in a car with a cold interior. A normal working car should warm up the interior for 10-15 minutes. What to do if the car's stove does not heat well or blows completely with cold air, we will consider the reasons in this article.
Winter is coming, it's cold in the cabin.
Someone will say it doesn't matter, I go in a hoodie,
How to defeat the frost so that the nervousness does not start,
On the Internet, you typed this heating request.
Let's take the first reason why, in order the stove does not heat it is a fan, this is one of the most commonplace reasons. If the fan does not work, it means that the warm air will not be blown into the passenger compartment. Of course, the radiator of the stove will heat up, but this is not enough to warm up the interior well. In this case, the fan fuse must be checked, and if necessary replaced. If the fuse is ok, then the fan must be replaced.
1. Stove fan
2. Coolant level
The second reason is the coolant level, if necessary, add fluid.
3. Airing the system
The third reason is the airing of the cooling system, you need to eliminate, and also find where the air enters the system.
4. Stove radiator
The fourth reason is the stove radiator, perhaps it is clogged. The reasons may be several. The first is improper mixing of liquids. The second reason is that water was poured. Water not only causes corrosion, but also forms scale on the walls. And the third is when you eliminate the radiator leak with the help of sealants. In this case, you need to either flush the cooling system or completely change the radiator.
5. Faulty thermostat
The fifth reason for poor stove performance is a faulty thermostat. If the fan is working fine with the stove itself, and the stove does not heat at all, then the problem is probably in the thermostat. Since with a faulty thermostat, the liquid circulates in a large circle. Solved only by replacing the thermostat or thermoelement.
6. Defective pump
The sixth reason is a faulty engine pump. A pump is, in fact, a pump of the engine that pumps fluid through the cooling system, as well as to heat the passenger compartment. The only solution is to change the pump.
The seventh reason is the broken cylinder head gasket. If this gasket is punctured, then the coolant will flow into the cylinders or muffler. White smoke will pour out of the muffler. In this case, you urgently need to change the cylinder head gasket, otherwise you can destroy the car engine.
The eighth reason is the expansion tank cap, if necessary, needs to be replaced with a new one.
9. Operation of air regulators
The ninth reason is to see how the air regulators work, perhaps they do not open completely. Or even the cable went off. You also need to see how the flap position switching works.
10. Dirty cabin filter
And the tenth reason for the poor performance of the stove is a dirty cabin filter. A dirty filter reduces the flow. It also needs to be replaced with a new one.
Well, that's all we have considered the main causes and malfunctions of poor stove operation. I would also like to add that in many cases the thermostat becomes the culprit for the poor performance of the heater, so pay attention to it.
10 reasons why the car's stove does not heat up (video)
In winter, it is extremely unpleasant when cold air is blowing from the ventilation deflectors at idle, although the stove regulator is switched to the maximum heating mode. The reasons for this phenomenon are different, we will first list them, and then we will consider one by one.
The root causes of the problem
In order to understand why the stove blows cold air at idle, it is necessary to clearly understand the principle of the heating system in the car. Otherwise, troubleshooting can be seriously delayed.
The principle of operation of the stove in the car
The vehicle's heating system includes:
- heater radiator;
- branch pipes;
- Control block;
- coolant pump (pump);
- heater tap.
The process of heating the car interior is as follows:
- The coolant circulates in the system thanks to the operation of the pump.
- In the process of heating the engine, heat is removed from it.
- Hot coolant enters the radiator and heats it up.
- The stove fan draws air from the engine compartment and feeds it into the passenger compartment through the heater radiator, which heats it up.
- This cools the fluid as a result of heat exchange (the engine receives cool antifreeze, and the interior receives a stream of warm air).
This is how the heating system works in most cars. Accordingly, the temperature of the air that enters the car interior depends on the performance of the various system components.
The main reasons why the stove does not heat well at idle speed:
- malfunction of the water pump (pump);
- airlock in the system;
- lack of coolant;
- burnout of the cylinder head gasket;
- malfunction of the stove tap;
- clogged pipes and heater radiator;
- malfunction of the thermostat;
- internal damage to the stove radiator.
Now let's look at how to determine the presence of each of the listed problems.
Pump malfunction
Very often, drivers explain the poor operation of the stove at idle with a breakdown of the water pump. This is due to the fact that on the 20th the pump impeller rotates at a low speed, which cannot provide high-quality circulation of antifreeze (antifreeze). As a result, heat transfer deteriorates and insufficient hot air enters the passenger compartment. When you press the gas pedal, the impeller speed increases, which immediately entails an increase in the air temperature in the passenger compartment.
For a more accurate diagnosis of the pump, it must be removed from the engine. Very often, a pump malfunction is accompanied by overheating of the motor. A visual inspection of the item will show its condition. If the impeller is jammed, rotates on the shaft, or its blades have crumbled, the pump must be replaced.
Airlock and lack of coolant in the system
This is an easily fixable problem. The culprit may be a faulty expansion tank cap that is unable to maintain the required system pressure. Another reason for the formation of jams is a lack of coolant. Weak circulation leads to the fact that cold air blows on the idle stove. When the car starts moving, the air temperature rises, and after stopping it drops again.
To eliminate the malfunction, it is necessary to check the level of antifreeze and, if necessary, add coolant. Also check the system for leaks and repair the leak if found. Often nozzles leak at the joints, but the radiator itself may be the culprit. If the tank cap does not work, replace it with a known good element.
After that, it is necessary to get rid of the air in the system by installing the machine on a hill or overpass so that its front part is higher than the rear one. Start the engine and open the expansion tank cap. Excess air must escape from the system. If after a while the plug reappears, this may be a sign of a breakdown of the cylinder head gasket.
Breakdown of the cylinder head gasket
It should be understood that damage to the cylinder head gasket leads to mixing of oil with antifreeze or the ingress of exhaust gases into the cooling system. Usually, the problem is quickly diagnosed with obvious signs. But some drivers note that the minimal burnout of the gasket may be accompanied by the appearance of excess air in the cooling system.
The solution can only be to replace the cylinder head gasket, but we advise you to take your time and check all other factors first... This is an expensive procedure and is rarely a problem, so save it for last.
Stove tap malfunction
All cars use a tap that cuts off the coolant supply through the heater radiator. It is he who is controlled by the "warm - cold" switch on the center console in the cabin. For various reasons, the faucet may not open completely. In this case, the stove does not heat up at idle, since hot antifreeze enters the radiator in insufficient quantities.
The solution is simple - the tap must be replaced. We advise you to choose high-quality spare parts, since cheap cranes quickly fail and wedge in a closed or open position.
Clogged pipes and heater radiator
During the operation of the car, dirt accumulates in the pipes and the radiator itself. This may be due to the use of low-quality coolant or its untimely replacement. As a result, the circulation in the system worsens, due to which there will be no heat at idle.
The way out of the situation will be to flush the entire cooling system. It is necessary to drain the antifreeze, fill in distilled water, adding a small amount of citric acid. There are also special flushing agents. We recommend flushing in several stages. In very difficult cases, it is better to replace the stove radiator.
Faulty thermostat
Sometimes the thermostat can get stuck open. As a result, the antifreeze will constantly circulate in a large circle. Accordingly, it will not be able to warm up normally. In some cases, the thermostat simply does not completely close the large circle. This practically does not affect the operation of the engine, so it is difficult to diagnose the problem.
The solution is to check the thermostat and replace it if a problem is found.
Internal damage to the heater radiator
In addition to clogging the radiator, some VAZ car owners discovered another factor why the stove blows cold air at idle speed. In the radiator of the stove there is a partition between the coolant supply and outlet pipes. It can crack or crumble, as a result of which the correct circulation of fluid inside the radiator is disrupted.
The problem can be detected only after disassembling the radiator, so it is better to have a working part on hand to check. If installing a working radiator resolves the problem, the old one can simply be thrown away. It is unlikely to be repaired.
Finally, I would like to advise you to monitor the correct operation of the engine cooling system of your car, use only high-quality coolant (read our article on whether it is possible to mix antifreezes of different colors -) and adhere to the manufacturer's recommendations!
Today is a very relevant article (especially in winter) - the car's stove does not heat, or it does not heat very well! Why is this happening and what are the main reasons for this. After all, a normal working car should warm up the interior within 10 - 15 minutes (unless, of course, you have a turbocharged engine, on it). If after 15 minutes you have barely warm air (or does not go at all), and all the glass inside is frozen, then this is not "good"! Read my tips below ...
First, let's think - how does the car warm up? As we all know, during operation, the internal combustion engine heats up very much, this happens from the friction of the pistons against the cylinder walls, as well as from the combustion of the fuel mixture. If you do not cool the motor, then it will quickly fail (the pistons will simply jam). A whole cooling system has been made from pipes, pipes and radiators, which does not allow the power unit to overheat. So one of the radiators is inside the cabin, under the dashboard. If you do not go into complicated technical details, then this stove radiator (heated by the engine coolant), and warms up your interior. And so that the heating efficiency grows several times, there is a fan nearby (having several operating modes, faster - slower) that blows this radiator, due to which warm air intensively flows into the cabin (both on the glass and on the passengers). And if something disrupts this process of work, then cold air enters the salon, that is, the stove does not heat. Now let's talk, in fact, about the main reasons
There are about five reasons for poor warm-up.
Fan does not work
The most commonplace reason, it happens, is that the fan does not work, it is corny that it is not blown, and, accordingly, warm air does not enter the interior well, or rather does not come at all. Of course, the radiator of the stove will warm up, but for heating the entire cabin, this is extremely insufficient.
It is necessary to replace the fan or the electronics that controls it. Or look at the fuse, often it just blows it.
Insufficient coolant level
This is now unlikely, because many modern cars have antifreeze level sensors. However, such cases do occur (say, in cars of previous generations). Imagine - he left (maybe due to leakage of radiators or pipes), enough heated liquid does not enter the stove, and it is practically cold, the fan is blowing, and the air is cold (it simply does not heat). You need to add coolant to the level (like this). Also, if the radiators or pipes are leaking, then the leak must be eliminated.
It is worth noting that if the cooling compound leaks, "air plugs" may form, so even if you add antifreeze - antifreeze, you need to wait a while for the air to come out to the level.
Stove radiator clogged
There may be several reasons:
The first is. For example, in G13 you filled, say, G11 or TOSOL in general, then a sediment may appear, which quickly enough clogs all the thin radiator pipes.
Second, water was poured. Water not only causes rusting of metals in the system, but also forms scale on the walls.
Third, they eliminated the leak of the stove radiator or the main radiator with all kinds of sealants. On the one hand, we treat, on the other, we cripple. The passages in the radiator can be clogged with excess of this sealant, the liquid cannot circulate normally in it, and, accordingly, heat it up, which means it will not really warm up. True, your engine may show high temperatures, at the limit (the main thing is not to overheat it). You need to either flush the system, clean the radiator, or simply change this radiator.
Faulty engine thermostat
Now about more complex breakdowns. If everything is fine with the stove itself, the fan is working, but it does not heat well, then the problem may be in the engine thermostat.
The thermostat serves to regulate the so-called "cooling circles". When we start the engine, the coolant flows in a "small circle", the engine and the interior stove are involved here. Thus, warming up is much faster. After the coolant has warmed up, the thermostat opens a "big circle" and the heated liquid has already gone and the main radiator, which is under the hood. This is done in order not to overheat the motor if there is excessive overheating.
BUT from time to time or from the quality of the coolant, the thermostat may fail and not close the "big circle", but always drive over it. Sometimes even an absurd situation happens when a small circle (even) is slightly blocked and a weakly heated antifreeze goes into the stove (which should warm up the interior). It is blown to the maximum (maximum speed), but the air is cold or barely warm. And since at -20, -30 degrees to wait until the "big circle" warms up for a very long time (and it may not warm up thoroughly at all), the interior will not warm up.
The only solution is to replace the thermostat! Moreover, the faster, the better, nevertheless, the glass in your cabin will not thaw either, which is fraught in winter, because visibility deteriorates.
Defective engine pump
A pump is essentially a mechanical (sometimes electric) engine pump that pumps hot liquid 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 passenger compartment.
It is a "impeller" that is inserted into a metal cylinder through which fluid passes. The impeller rotates, thereby pushing the antifreeze (TOSOL) through the system. If there was no pump, the cooling of the motor 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 as follows:
- Sometimes the belt from the crankshaft tears, the pump does not rotate and does not drive the "coolant" through the system. Accordingly, the stove does not heat. However, the power unit will also overheat.
- It wedges the pump itself. It does not rotate, or the inner part of the "impeller" does not rotate.
- Eats up the inside. Due to the "shitty" quality of the metal, the inner impeller can be eaten by aggressive antifreezes or antifreezes. Therefore, purely physically, the pump pulley rotates, but the fluid pumps through the system very poorly. Again, the stove does not heat.
For all the reasons, the pump needs to be changed. I’ll say right away the first "bells" may be - whistling in the engine compartment, a hot hose to the pump or stove, but cold after.
Engine head gasket punctured
The thing is that the motor is not a monolithic structure, it has a block head and a block itself. They are connected through a special gasket. If this gasket is punctured (and this happens, for example, with a poor broach), then the coolant will go into the cylinders or the muffler (it will be from the muffler). Thus, there will be not enough coolant in the system (air locks may appear) and therefore the stove will not heat well! It is urgent to change the head gasket, otherwise you can kill the engine through overheating.
Buy a new serviceable expansion tank cap and thoroughly lubricate the valve with silicone grease before installing. Pull the clamps. It is not possible to check for damage to the hoses. The hole will be where you will not see it in any way. You can replace the pipes with the next change of antifreeze after about five years of operation.
Another way of air intake is the pump oil seal. It is clear that you will not change the pump, only on the suspicion that it leaks slightly. But be sure to change when replacing the timing belt. If this is not done, then the flow of antifreeze will only increase over time, so much so that the grease will be washed out of the bearing. If the pump bearing is a ball bearing, then a nasty squeak, nevertheless, will force you to replace the pump. The roller bearing can jam and destroy the pump housing.
In addition to the entry of air into the cooling system, it is removed. For this, each engine has a special device - a steam pipe. In a Kalina car, a steam pipe connects the radiator and the expansion tank. When the temperature is close to boiling, bubbles of water vapor and air float to the top of the radiator and are carried out by the flow of coolant into the expansion tank.
In summer, when the thermostat is open for a long time, no bubbles will linger in the system for a long time. Everything changes when the outside temperature drops. Much less heat is needed to dissipate to the cooling radiator, and heat transfer is much more efficient. The thermostat opens briefly, and air bubbles travel with the flow until they enter the relatively calm heater radiator. However, it is worth adding speed, and the circulation through the stove reappears.
When the car gets stuck in a traffic jam, the antifreeze in the cooling system warms up the whole. The thermostat opens again permanently. All the air comes out. By insulating the cooling radiator, we make it difficult to cool the antifreeze in the radiator and therefore increase the opening time of the thermostat. That is, the air removal will be better. As a bonus, you will find that the engine cools down more slowly.
When insulating a radiator, do not forget that it must still dissipate heat. When you turn on the fan, the temperature should drop, so do not cover the radiator completely.
Removing the airlock
As you now understand, there is no need to specially remove the airlock. The air must be evacuated by itself when the thermostat is opened. If you definitely want to do this, there are simple ways.
If there is a heating throttle, then it will be the highest point of the cooling system. Therefore, you can do this. Remove one of the heating hoses. Ask an assistant to blow into the tank. Under the influence of increased pressure, the coolant level in the reservoir will drop, and in the rest of the cooling system will rise. As soon as the antifreeze flows out, put the hose on the fitting.
If, after pumping the cooling system, the stove blows with cold air, it makes sense to try to give high engine speed in order to increase the speed of the pump and give more pressure in the pipes, it is possible only then will push the air lock.
On some car models, after replacing the stove radiator, it is required to install special equipment for pumping antifreeze, since it is very difficult to pump and expel all the air on its own.
You can warm up the engine in place before turning on the cooling fan. At the same time, it is not necessary to drive up the hill, but it will be useful.
Of course, these are not all possible stove problems.
- The faucet may break and leak or the valve control rod may break.
- The stove resistor may burn out, and the fan will only work at maximum speed.
- Malfunction of the system of cables and dampers on the stove
- Stove radiator coked up
- Clogged
- coolant level too low
- and is constantly in the open position
But still, the air in the cooling system is half of all the faults with the stove. Moreover, more than half.
Video on the problem of a broken car stove
Car engine cooling system, principle of operation, malfunctions How to replace the radiator of the Peugeot 308, 408 stove Replacing coolant, antifreeze or antifreeze The engine is heating up, the reasons for the engine overheating Peugeot radiator - removal and installation, replacement of the cooling radiator 
If the windows in the car are sweating - what to do and what are the reasons.
