Poor blowing of the windshield of a VAZ 2114

VAZ 2115. Why is there very poor air pressure on the windshield? Somewhere in the middle of the glass even more or less, and in other places generally barely

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You need to check the windshield defroster. It probably doesn’t open completely because the control cable is loose or has fallen off the lever. Either adjust it or just put it on the lever.

Happy owners of the domestic VAZ-2114 car in some cases have to deal with improper operation of the heater. It is especially annoying when such a failure occurs in winter, because hardly anyone would dare to call staying in a cold cabin comfortable.

It often happens that in a VAZ-2114 car, the heating generally functions as it should, but cold air only blows onto the windshield. In this case, the crust of ice formed on its surface does not melt - and as a result, it is difficult to drive the car.

Sometimes the heat does not come from the vents located on the sides of the instrument panel. It is worth noting right away that any malfunctions with the heating system must be eliminated as soon as possible, since the harsh climatic conditions of our country in this case threaten serious troubles for the car owner.

Solving the problem

First of all, you need to check the heater valve.
It opens and closes with a special cable. If its tension has weakened for some reason, then when you turn the lever, the faucet either does not open at all or moves literally a few millimeters. It will need to be tightened. It is easy to check the performance of the radiator itself by warming up the power unit while the fan is not working. All you need to do is gently touch the antifreeze supply and discharge pipes with your hand.

Getting to them is easy - you just need to open the hood.

Often, over the summer, the heater valve manages to sour, as they say. Therefore, when an attempt is made to open it, the damper simply breaks off and the drive roller remains in place. Such an element will have to be completely replaced with a working one.

If the cooling fluid level is very low, this will cause the radiator to remain relatively cold. Here you will need to look for a leak and replenish the coolant volume.

If the thermostat breaks down, it needs to be replaced with a new one, and the air lock is removed by pumping antifreeze through the system.

A failure of any main element of the heating system should be suspected only when warm air stops flowing into the cabin altogether. If its supply is limited only in several directions, then most likely we are talking about local breakdowns.

Reasons for unsatisfactory performance

In the summer, the heater is not used, and car enthusiasts begin to remember its existence only in the fall, when it gets colder. If the stove blows cold air on a VAZ-2114, then many reasons can be identified.

The electric motor may have failed, or the heater radiator may be clogged. Cold air is also a symptom of an air lock in the engine cooling system. The cylinder head gasket may burn out. Milder faults include a jammed faucet, a broken thermostat, insufficient coolant in the radiator, or reduced pump performance.

On a VAZ-2114, it sometimes happens that warm air is supplied only through the central deflectors. Cold air is supplied from the flaps located on the sides of the dashboard. Often the cause is a broken drive cable. As a result, air from the heater does not flow into the air ducts on the sides.

Car owners often write on forums that cold air blows from the stove on the VAZ-2114, but only at idle or just at low speeds of the power unit. There are more possible reasons here. To solve the problem, you will need to check all the main components involved in the operation of the stove.

Why does it blow cold on the windshield?

The supply of heated air in this location is regulated by a special damper. It is driven by a cable, which on a VAZ is generally stretched very often. This, in turn, leads to the fact that the damper itself does not open fully. In such a situation, air will be supplied inside the car directly from the street, that is, cold.

Understanding the principle by which heating functions in the VAZ-2114, it is generally not difficult to find out what the actual problem is. But even an experienced car enthusiast will need a lot of time to fix it. The thing is that the stove itself is located directly behind the panel located in the front of the cabin, near the steering wheel - troubleshooting requires its dismantling.

The problem with the cable is most noticeable when the temperature control is turned downward (that is, to the left).

Repairing heating in general is quite easy. You should proceed in this order:

The cover under the steering wheel on the left is removed;
the cable itself and its fastening are found near the gas pedal;
the clamp is dismantled;
the cable is tightened so that it does not sag;
fixed with the same clamp;
the damper control levers move (left to right all the way and vice versa);
The tap regulator is set to maximum.

After this, the ignition is turned on and very soon fairly hot air begins to blow from the previously blocked holes. As practice shows, these manipulations help get rid of the problem in virtually all cases.

True, sometimes car owners note that despite the fact that the temperature regulator has begun to work much better than before, the air still flows warmer than hot. In addition, when you move it to the left, a cold stream sometimes escapes from the side deflectors, despite the heater being running. The problem here is that the specified regulator not only controls the faucet, but also the damper that prevents the supply of outside air.

To eliminate this mess, you will need to remove the cable of the damper mentioned above from the heating regulator. This is done as follows:

remove the cover on the right side of the steering column;
the regulator drive is found there (it has 2 cables);
the one to the right is unhooked;
the dismantled cable is tensioned so that the damper moves to the position of maximum heating of the interior;
the resulting excess piece is cut off after fixing it in the old place, with a margin of no more than one and a half centimeters.

After this, the stove should work fully, and adjusting the temperature will be easy and comfortable.

Before we talk about why the windshield defogger does not work, let’s consider the operating principle and design of this system. Structurally, the ventilation and heating system of VAZ models of the Samara family is designed so that air enters the cabin through the cracks at the top of the dashboard, central and side nozzles, heated footwells and through the lowered door glazing. To increase the force of air flow, a fan is provided in the system.

Malfunctions in the cooling system

If the thermostat is faulty, the antifreeze will constantly move within a large circle. As a result, the coolant will not heat up. This is another reason why the stove blows cold air. VAZ-2114 often has problems with the heater. To solve and eliminate this breakdown, check the thermostat for serviceability. And if it doesn't work, it is replaced.

Another reason is an air lock in the cooling system. Traffic jams can form due to air entering the upper part of the radiator while the antifreeze is cooling. This “bubble” then moves to the thermostat. The next time the driver starts the engine of his car, the pump will pump air back into the radiator. And the heater will blow cold from the deflectors.

To combat airing, you need to remove the pipe that goes to the heater and fill it with coolant to the top. In this case, the antifreeze level in the cooling system should not be lower than the maximum. If the stove blows cold air on a VAZ-2114, it means there is insufficient fluid level in the system. It should be at least average.

If the heater blows cold air at idle or at speeds close to idle, then the pump may be the cause. The pump is not able to ensure normal circulation of antifreeze in the cooling system. These problems are usually accompanied by insufficient coolant in the system.

Poor windshield airflow

One of the problems with the ventilation and heating systems of VAZ models is poor airflow through the windshield. Many owners, complaining about design flaws, try to make modifications or turn to service center specialists for help. However, in most cases, if the windshield blows poorly, the problem is not some kind of defect, but a simple adjustment.

As practice shows, weak windshield airflow is primarily caused by the damper. More precisely, all the problems are due to the fact that the damper control cable has become loose or has fallen off the lever. It just needs to be pulled up or put in place.

Adjusting the windshield defogger system

As we said above, in order to ensure normal airflow on the windshield of Kalina or another VAZ model, you must first check the tension of the damper control cable. To do this, you will first have to remove the left screen of the dashboard, having first unscrewed all the mounting bolts.

If you see that the cable tension is not enough to completely close the damper, you need to shorten it a little. We will need an awl and wire cutters. First you need to remove the bracket. Along its edges there are semicircular cutouts, into one of which we insert an awl and carefully remove the tip from the end of the cable. Then, using wire cutters, we bite off one turn, and then twist the remaining part. After this, we thread the end of the cable back.

To make sure that the actions are correct, we test the operation of the windshield blower. Turn on the stove and control the airflow. If the air flow is weak and cold, you can repeat the procedure and bite off another turn of the cable tip.

Note. You should not immediately bite off two or more turns of the end of the damper control cable. You can overdo it and ruin everything. It's better to do everything gradually.

After completing the cable tension adjustment, install the panel in the reverse order.

Modification of the windshield blowing system of VAZ-2113 (2114, 2115)

Almost every Samara owner complains about uneven airflow in the cabin. This is primarily expressed by the fact that hot air flows from the central air ducts (from the dashboard) to the windshield, and a cold flow comes from the side nozzles. This situation manifests itself most clearly when the heater temperature decreases when the control lever is moved to the left.

As a rule, service centers do not solve this problem. Masters claim that this is the operating principle of the system. However, you can fix everything yourself.

First, we dismantle the torpedo cover, which is installed on the left. Not far from the gas pedal there is a throttle control cable secured with a bracket. The clamp should be loosened and the cable pulled down. Then we fasten the bracket and move the right damper control lever to the left all the way, and the left one to the right all the way. In this case, a warm flow from the side air ducts will be supplied to the windshield.

However, the desired control of the temperature of the windshield blower flow will not be implemented in all modes. When the lever is moved to the left, cold air will still flow in a certain position. This is due to the fact that the lever controls both the damper and the heater valve. The damper, in turn, allows access to cold air flow.

To prevent this from happening, you should disconnect the cable that controls the damper. To do this, first remove the torpedo cover on the right and find the engine that controls the temperature. Two cables are connected to it. We select the cable located to the right and tighten it so that the damper moves to the maximum heating position. After this, we bend the cable at the attachment point. Now the damper will always be in this position. The cable should be cut off with wire cutters, leaving 15 mm. Otherwise, the extra length will interfere with the movement of the engine. After such modification, a flow of warm air will flow into all air ducts, and the temperature will be smoothly regulated in any position of the lever.

Poor airflow on the windshield of a VAZ-2107

The disadvantages of the ventilation and heating system of the VAZ-2107 are known to every owner. Many craftsmen install a more powerful motor instead of a standard electric motor, which is used in the ventilation and heating system of the VAZ-2108. However, this modification is ineffective.

To achieve the desired result, experts recommend completely redoing the standard stove, installing not only the 08 electric motor, but the “snail” assembly. To do this, it is necessary to change the lower part of the stove so that a snail can be mounted into it. However, this procedure is quite complex and time-consuming. If you wish, you can find a detailed description on the Internet of how to modify the VAZ-2107 windshield blower with your own hands.

One of the reasons for insufficient windshield airflow may be a loose closure of the lower fan housing cover. In this case, part of the air flow goes down to warm the feet. To fix this problem, you need to install a small latch. For example, those used in the manufacture of furniture. You can also mount the lock in the form of a bolt. To do this, drill a hole for a bolt with a diameter of up to 5.0 mm in the lower corner of the fan casing, where the cover lever is located. We secure the bolt with a nut. We drill a similar hole in the lid handle. Such a small modification will allow the lid to be securely fixed in the closed position.

On a VAZ-2114 the stove blows cold air on the sides

You can see a photo of the side flaps below.

Using pliers, without removing the damper. Having approached the problem area, we press the element by several tens of degrees.
Using pliers. This is a more effective option. To do this, you need to remove the torso from the damper lever and tighten it a little. For convenience, it is recommended to partially disassemble the console. This way you can control the tightness of the dampers in place.

Solving the problem

Getting to them is easy - you just need to open the hood.

If the cooling fluid level is very low, this will cause the radiator to remain relatively cold. Here you will need to look for a leak and replenish the coolant volume.

If the thermostat breaks down, it needs to be replaced with a new one, and the air lock is removed by pumping antifreeze through the system.

Cooling system diagnostics

If suddenly the stove starts blowing cold air, the VAZ-2114 needs to be diagnosed. You need to open the hood of the car and check the coolant level in the corresponding expansion tank. If necessary, add antifreeze or antifreeze. Then you need to start and warm up the engine. You should pay attention to the temperature sensor readings. If there is no increase in readings, then the valve in the thermostat is to blame.

Air in the cooling system can also indicate a burnt-out cylinder head. This malfunction is often accompanied by leakage of antifreeze from the tank and too high temperature sensor readings. The power unit will triple. Due to a burnt-out cylinder head, coolant will enter the oil, after which it will lighten. The breakdown looks like the one shown below.

If the cylinder head gasket is broken, then cold air will blow into the cabin only at idle or close to it - on a VAZ 2114, a hot stove blows cold air. If you press the accelerator, the heater will start and the heater will supply normal hot air. In most cases, the problem can be solved by replacing the gasket.

Why does it blow cold on the windshield?

The problem with the cable is most noticeable when the temperature control is turned downward (that is, to the left).

Repairing heating in general is quite easy. You should proceed in this order:

The cover under the steering wheel on the left is removed;
the cable itself and its fastening are found near the gas pedal;
the clamp is dismantled;
the cable is tightened so that it does not sag;
fixed with the same clamp;
the damper control levers move (left to right all the way and vice versa);
The tap regulator is set to maximum.

To eliminate this mess, you will need to remove the cable of the damper mentioned above from the heating regulator. This is done as follows:

remove the cover on the right side of the steering column;
the regulator drive is found there (it has 2 cables);
the one to the right is unhooked;
the dismantled cable is tensioned so that the damper moves to the position of maximum heating of the interior;
the resulting excess piece is cut off after fixing it in the old place, with a margin of no more than one and a half centimeters.

After this, the stove should work fully, and adjusting the temperature will be easy and comfortable.

Note : Some Samar models were equipped with heaters of the 2108-1 series. This system is distinguished by an almost horizontal position of the radiator and a different distribution of air flows. When the damper is in an intermediate position, the hot air flow comes from below. As a result, warmer air is supplied to the feet, and a cooler flow enters the glazing.

Design features

Electric motor .
The commutator electric motor of the fan is powered by direct current; for more information about electric fans, see the website. To control the fan speed, a four-position regulator is provided on the dashboard. The rotation speed of the electric motor is changed by connecting or disconnecting additional resistors. When the engine is turned on directly (without resistors), the rotation speed will be maximum. The electric motor cannot be repaired and if it fails, it is replaced along with the fan wheel. The only thing that can be done to maintain the engine is to clean the manifold if necessary.

Poor windshield airflow

Adjusting the windshield defogger system

Note. You should not immediately bite off two or more turns of the end of the damper control cable. You can overdo it and ruin everything. It's better to do everything gradually.

After completing the cable tension adjustment, install the panel in the reverse order.

Modification of the windshield blowing system of VAZ-2113 (2114, 2115)

As a rule, service centers do not solve this problem. Masters claim that this is the operating principle of the system. However, you can fix everything yourself.