How to revive a car stove if cold air comes out of it

Stove motor

The stove in the Lada Vesta differs from similar devices on other AvtoVAZ models. The difference can be found not only in the design of the heating system, but also in the features of correction and control.

Stove (heater) Lada Vesta, device and reviews

The heating, ventilation and air conditioning system of the Vesta's interior differs from similar systems of other Lada models. The difference is not only in its design, but also in the control method. Let's look at the design features of the Vesta stove, and also evaluate its effectiveness.

Tips for motorists

The interior heater is an important component of the equipment of any car. It is used almost at any time of the year, and if there is air conditioning, it can be used all year round. Therefore, it is very important to monitor its performance, so as not to encounter a stove failure at the most inopportune moment. We will tell you about the main reasons for the malfunction of the interior heating system and how to eliminate it.

Elements of the ventilation and heating system

The stove body (in Fig. No. 5) is located in the car interior under the instrument panel frame. Inside the case there are:

• heater radiator;
• electric fan;
• fan speed controller (RFV) or additional resistor;
• air flow distribution damper;
• gear motor that regulates the dampers;
• air filter.

The heater radiator releases heat to heat the interior. Located inside the case on the left side. To replace it, you will have to remove the upper frame (lining) of the panel (dashboard).

An electric fan forces air into the car interior through air ducts. It is located on the other (right) side of the body. Access to it opens after removing the glove compartment.

The additional resistor is designed to regulate the rotation speed of the fan motor. It is installed on the heater housing on the driver's side.

The cabin filter cleans the air entering the cabin. Located in the heater block on the passenger side. It is replaced from inside the car (and not from the engine compartment, as on Grant, Kalina or Priora). In addition, the filter element resource is 30,000 km, and not the usual 15 thousand km.

The job of the gear motor is to regulate the position of the damper, which distributes air throughout the cabin. How this happens is shown in the video:

Air temperature sensors in the cabin and outside transmit readings to the engine control unit (ECU).

The control unit for the stove (heater) and air conditioner (SAUKU) is designed to regulate the air temperature in the cabin, change the speed and direction of air flows, and control the heaters. Depending on the configuration, the SAUKU may differ slightly. There are three types in total:

1. SAUKU without air conditioning;
2. SAUKU with air conditioning;
3. SAUKU with climate control.

Problems

Stove motor During operation, the device may become unusable or reduce its efficiency.
We check the fan at all four speeds:

• if the fan stops rotating, look at the safety element in the control unit;
• if one of the speeds does not work, the reason is a breakdown of the additional resistor or car wiring.
• When the fan operates at low intensity, you need to clean the air intake grille or filter.

Interior ventilation diagram

Air ducts run from the stove body, which direct air flows to the windows, into the interior and legs. The central deflectors can adjust air flow in different directions, and its strength is controlled using a horizontal wheel underneath them.

AvtoVAZ has implemented airflow for the Vesta driver’s feet in a new way. The air duct nozzle is located not on the side, but above the foot of the right foot. Some owners of the new sedan believe that this design is not very successful, because It warms the toes worse than the foot itself. For the front passenger, the air duct exits closer to the wall of the engine shield and a similar situation will not arise.

Worth o. On versions of the car with air conditioning, a small air duct fits into the glove compartment, which can cool, for example, a water bottle.

Heater and air conditioner control

“Classic” block without air conditioning

Left regulator (No. 9) – supply air temperature control; Right (No. 17) - air flow regulation; Buttons (No. 11-16) - setting the direction of air flow.

Comfort unit with air conditioning

The left regulator additionally has the function of turning on the air conditioner (No. 18), and the right one has the function of turning on air recirculation (No. 19). Otherwise, the control of supply air temperature, fan speed and air flow distribution of the Comfort version of the system is similar to the Classic version.

Luxe unit with climate control

Two buttons are replaced on the control unit:

• “Defrost MAX” mode (No. 24) - the air conditioning is forcibly turned on (if conditions permit), electric heating of the windshield and rear windows and side rear-view mirrors. The entire air flow is directed to the blower nozzles of the windshield and front side windows, and the maximum speed and air temperature are set.
• “AUTO” mode - in this mode, the air flow intensity (fan speed) and one or another air flow distribution mode are automatically set depending on the outside air temperature, the cabin air temperature and the coolant temperature of the engine cooling system.

The information display (No. 10) has also undergone changes; the air temperature scale has been replaced with numbers.

The heater does not turn on

Lack of response to turning on the heater means: failure of the switch, the fan itself, or a blown fuse. First you need to make sure the integrity of the latter. To do this, open the block cover in the lower left part of the panel and find fuse F25 (30A), indicated in the photo:

If it is burned out, replace it with a similar one - 30A. But before this, it is strongly recommended to find out the reason; perhaps the “dying” fan motor was the culprit for the blown fuse.

Also, if the fan operates only in the last, fastest mode, the resistor unit is to blame.

Reviews about the Vesta stove

The first reviews from Vesta owners about the stove are generally positive. No significant deficiencies were identified. The car warms up quickly. It blows quite strongly from all the air duct nozzles. In cold weather at -25 degrees, the car interior is warm and comfortable. When using the control unit and adjusting the deflectors, the cost of the parts is not visible; in terms of quality, it resembles a foreign car.

To improve the efficiency of the heater, close the glove compartment cooling in winter:

Let us remind you that with the first cold snap we were also able to test the operation of the heating. You can find other information about Vesta that interests you in this content. By the way, problems with the operation of the stove can be caused by an air lock in the cooling system.

How does your Vesta’s stove heat? In the comments to the article we leave impressions and notes about the efficiency of the heater.

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Typical stove malfunctions

The most common problems with the stove on Lada Vesta are the following:

• the actual temperature does not correspond to the set one - low level of antifreeze (antifreeze), clogged radiator pipes or the formation of an air lock, which causes cold air to blow;
• vibration appears during operation - the electric motor is loose;
• insufficient air flow from the deflectors - clogging of channels and air ducts;
• the heater is inactive when it is activated on the dashboard - failure of the fuse (No. 14) of the mounting block.

Checking the stove fan

During the circulation of the air flow, dust particles settle on the surface of the impeller, as a result of which it begins to make noise and extraneous sounds appear.

To clear the fan blades of debris, it is necessary to provide access to the unit.

1. Unsnap the glove box.
2. Remove the filter element.
3. On the right is the furnace mechanism. We press the plastic clips and turn the impeller counterclockwise.
4. We remove the motor.
5. We wipe the drive with a rag.
6. Install the parts in reverse order.

Cooling, heating (engine and air conditioning radiators) Lada Vesta

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