How to replace the stove tap on a VAZ-2109 yourself

Tap function

In a VAZ-2109 car, coolant circulates through two circuits. If a large one is used, then it passes through the engine. It heats up there and then goes to the radiator of the heater itself. This element is blown by a special fan, which drives the air heated by the stove into the cabin.

In summer, the large circuit is not used, and the liquid circulates exclusively through the small circuit, which includes the main radiator and power plant. The air ducts of the stove provide ventilation to the interior.

The tap itself regulates the supply of hot coolant to the heater or completely blocks its access there. Accordingly, during the warm season it is constantly in a closed position.

Features of the VAZ 2109 stove design

1. Heater casing mounting bracket; 2. Heater control damper; 3. Left heater casing; 4. Leg heating damper rod; 5. Radiator gasket; 6. Radiator; 7. Heater gasket; 8. Electric motor; 9. Fan shrouds; 10. Fan impeller; 11. Heating damper; 12. Heated windshield air duct; 13. Side nozzle air duct; 14. Side nozzle; 15. Central nozzle flap; 16. Blade pusher; 17. Blade axis; 18. Shoulder blade; 19. Lever for shutting off the central nozzle; 20. Windshield heating damper rod; 21. Lever for changing the direction of air flow; 22. Air heating control handle; 23. Windshield air supply handle; 24. Leg air supply handle; 25. Control lever bracket; 26. Bracket for fastening the rod shell; 27. Crane control rod; 28. Heater control damper rod; 29. Foot heating flap; 30. Axes of air heating control levers; 31. Screw clamp; 32. Heater valve; 33. Crane body; 34. Valve lever; 35. Hoses connecting the tap to the heater radiator; 36. Internal ventilation duct; 37. Windows for heating the feet of rear passengers; 38. Heater valve; 39. Driver's foot heating window; 40. Facing the central pillar; 41. Internal cavity of the central pillar; 42. Exhaust ventilation duct; 43. Upholstery of the central pillar; 44. Exhaust ventilation deflector lining; 45. Rubber valve; 46. ​​Deflector housing; 47. Exhaust ventilation deflector; 48. I. Heater; 49.II. Heater operation diagram; 50.III. Heater valve; 51.IV. Interior exhaust ventilation

The stove consists of 2 plastic casings (right and left), which are connected to each other along the perimeter with fastening brackets. A special harness is placed into the grooves of the casings for sealing. The electric fan, which forces air into the passenger compartment, is secured with two screws on top of the heater. The design of the stove is made in such a way that the electric fan can be easily removed from the engine compartment.

An electric motor of type 45.3730 is attached to the fan casings, on the shaft of which an electric fan impeller with three rotation speeds is installed thanks to two resistor spirals. To obtain the required rotation speed of the impeller, an additional resistor is provided, attached to the hole in the stove casing on the left side with a screw.

The radiator for heating the supplied air is installed in the heater casings. It is attached to the right casing with three screws and sealed with a polyurethane foam gasket. It consists of:

• two rows of tubes,
• cooling plates,
• two plastic tanks.

The heater tap, consisting of a housing with two pairs of pipes, is connected to the cooling system by rubber hoses. The cooling system pump circulates fluid through the radiator. On the supply line in the faucet body, a plate faucet valve is installed on the axis, which has a hole that allows coolant to pass through. The valve lever is connected by a rod to the handle lever, which can be used to control air heating. When you turn this lever, the hole in the valve will open the line so that fluid begins to flow into the radiator. Read more about replacing the heater valve here.

The stove is controlled using three handles, the levers of which are mounted on the axes of a plastic bracket attached to the instrument panel with four screws. The heating control handle acts on the valve lever through the rod and on the damper drive lever. When it moves completely to the right, both the valve and the damper are fully opened, and air is supplied by an electric fan through the radiator, where the heated coolant flows.

When the handle is in the middle position, the valve and damper are in intermediate positions; in this case, part of the air passes through the radiator, and part bypasses it. This reliably ensures the required degree of air heating at the moment. If the handle is placed in the extreme left position, the valve and control damper are completely closed, and the air supplied to the cabin is not heated.

The upper left handle, which regulates the air supply to the feet of the driver and passengers, is connected to the damper lever by a rod. When it is moved to the left, the foot warmer flap opens and air from the casings is directed into the windows. On the left and right sides, air is supplied to the feet of the driver and front passenger. Air is supplied to the feet of passengers in the rear seats through the interior ventilation duct.

Why do breakdowns occur?

As noted above, the shut-off valves of the heater are a very vulnerable element of the VAZ-2109. If it fails, then it will not be possible to ignore the breakdown. First of all, on the floor, at the base of the passenger seat in the first row, a puddle forms under the carpet. In addition, leaking antifreeze emits a very characteristic odor, which should also suggest a malfunction of the stove.

Leakage occurs for three main reasons:

• use of low-quality cranes by a domestic automaker;
• oxidation;
• mechanical destruction.

The Volzhsky plant supplies its products with membrane-type locking fittings. This system has one inherent drawback - poor tightness. Even with careful use, such taps break very quickly.

The second malfunction occurs due to the fact that the heating system is not used for at least 4-5 months a year. This period is quite enough for the valve casing and moving elements to become covered with sediment. As a result, his insides literally stick together. The owner of the car makes a significant effort to open it , and as a result the unit simply collapses. That is, a third type of breakdown occurs.

Which one is better to choose?

The quality of the new crane largely determines the duration of its operation and the reliability of the entire system.

In total, there are three types of this unit on the Russian market. This means:

• standard, that is, native, used by the manufacturer;
• ball valve;
• ceramic.

The first one is very inexpensive, but usually lasts a fairly short period of time. For this reason, it is worth choosing it only when the car enthusiast does not have extra money or if he was unable to buy anything else.

The ceramic model is more expensive and quite durable, but its disadvantage is its relatively low throughput. If you live in the southern regions, then feel free to take this option. Otherwise, a ball valve is ideal. This type of locking valve is different:

• great reliability;
• strength;
• good throughput.

However, the latter option may also turn sour over time.

What you need to replace the heater tap

Before you start working on the VAZ stove, you should prepare all the necessary tools and consumables. In particular, you will need:

• new working faucet;
• steel clamps (2 pcs.), opening up to 23 millimeters;
• antifreeze, at least 4 liters;
• tap gaskets;
• sealing compound (special automotive or plumbing silicone with a neutral reaction);
• bucket for old coolant;
• sets of keys and screwdrivers;
• pliers.

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So, how to change the heater tap on a VAZ-21099? How easy is it to host a self-planned event?

Sometimes a problem with heating a car interior can be successfully corrected only if you understand how to adjust the faucet of the VAZ-21099 stove. In this case, you will need to remove the entire device to correctly determine the nature of the problem. What is the best way to proceed?

1. Initially, you need to disconnect the hoses from the pipes located on the tap of the heater.
2. The next step is to unscrew the faucet fasteners and remove it.
3. The rods going to the part must be dismantled.
4. After this, it is recommended to remove the trim panel located on the floor of the vehicle.
5. The air duct located in the tunnel should be disconnected.
6. Now you need to carefully remove the heater wires, unscrew the mounting nuts and remove the device.

After this, you can change the heater tap. Knowing where the heater tap is located on the VAZ-21099 and correctly determining its functionality, it will be easier to cope with subsequent tasks. All steps must be performed in reverse order.

Despite the ease of the task, you may still need the help of a friend. If guidance is provided, you can understand how to open the heater valve on a VAZ-21099 and make it work. In fact, it is possible to miss a small detail in the pipes and nuts, but fixing it is not so easy. It is not as easy for a beginner to find the slightest error as we would like.

It is important to understand that the valve of the VAZ-21099 injector stove must be positioned correctly for successful heating of the car interior:

• an additional pipe is installed in the thermostat housing;
• A special plug for the water pump is placed in the housing.

As a result, liquid from the heating equipment will flow to the thermostat, and then continue its cycle. It is assumed that the thermostat will be included in the automatic cooling system, so there is no need to worry about overheating or excessive cooling of the engine.

In most cases, the question of how to change the used stove faucet is not so easy. However, it can be solved just as successfully as many other issues related to the heating system of a domestic vehicle. Only if you correctly replace the used faucet can you count on successfully heating the car interior and maintaining the most comfortable temperature.

Problems with VAZ 2108-99 heaters with a high panel

Almost all owners of these cars note that cars with a high panel have a “colder” stove. Moreover, measures such as replacing and adjusting the heater tap, replacing an aluminum stove radiator with a copper one do not bring the desired result.

The point is a flaw, or, more precisely, a miscalculation in the design of the heater as a whole. For comparison, look at how heaters with low (a) and high (b) panels are arranged:

The heater control damper 8, working “paired” with a tap, on a stove with a high “torpedo”, is structurally designed to create less resistance to air movement, which contributes to better “purging” of the radiator.

But in reality, it constantly warps, as a result, cold air is not cut off (when the tap is open), but gets into the cabin in addition to the radiator. It’s practically impossible to eliminate this on your own, so some owners change the stove body by installing the “old” version.

Cable location

Learn more about how this process is carried out in the video below (the author of the video is the Engine Repair channel! And interesting!).

So, get your pliers ready and remove the upper part of the dashboard. By the way, you can do without dismantling, but this way you can clearly see where the central damper of the VAZ-2109 heater is located, assess its condition and control the adjustment process. After removing the panel, find the fastening cable, which is located to the right of the accelerator pedal and, using pliers, carefully bend the wire.

In the “nine”, the VAZ heating system operates using an electric drive. The instruction manual for the VAZ 2109 high panel shows an electrical diagram of the stove's operation. The interior heater connection diagram consists of:

• fan motor;
• the ignition switch, which turns on the stove;
• operating mode switch;
• additional resistor;
• fuse mounting block (fuse F4 is responsible for the stove in the “nine”).

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The first thing you need to do is turn off the power to the car. To do this, simply remove the negative terminal from the battery. Remove the panel trim in the area of ​​the ashtray, radio and the mounting of the heater control levers - to do this, unscrew the 4 fastening bolts. Disconnect the wires from all switches: lights, foglights, radio, etc. Move the front seats all the way back or, in general, remove them so that they are not in the way. Remove the seat belt anchors on the floor. Also remove the plastic trim that holds the gear lever boot on. From under this casing you will need to remove the lower air duct

Very carefully disconnect the clamps from the faucet, and then the cables themselves. To make it convenient, first disconnect the leg heating flap rod (3), then the windshield heated flap rod (14), then the rod that controls the valve (19) and the rod that controls the flap (20).

On the back of the heater, disconnect the wires that control the fan speed and the fastenings of the wires, backlights and levers. Not quickly, so as not to damage it, lower the heater control lever diagonally downwards. Now you can remove the cable and replace it with a new one.

As you know, on the VAZ 2109, interior heating is provided by air heated by a radiator. On the VAZ 2109, the heating and ventilation of the interior are interconnected and represent a kind of special system. In this article we will look at the general principles of operation of the heating and ventilation system of the VAZ 2109.

Like most repairs, this procedure is carried out on an overpass. Replacement requires the following tools:

• Container for draining coolant;
• Classic set of wrenches and screwdrivers;
• Sealant;
• WD – 40;
• New faucet with a set of rubber gaskets.

Operating procedure:

1. 1. Display the VAZ 2109 car;
2. 2. Place the prepared empty container under the motor and, opening the drain hole, allow the coolant to drain;
3. 3. Next, you need to unscrew the pipes running from the engine to the heater. To do this, just loosen the fastening clamps. It happens that they do not give in, then it makes sense to use a “bucket” and clean the threads of the crane bolts;
4. 4. Remove the pipes and drain the remaining antifreeze;
5. 5. Remove the side trim of the dashboard in the car interior. Here, too, unscrew the pipes;
6. 6. Then, using a 10mm wrench, loosen and unscrew the faucet fastening nuts. It's under the car. Continue working inside the car again and tighten the tap on the passenger seat side. Then remove the clamp. Disconnect the control cable;
7. 7. The next stage is the installation of a new tap. First of all, it must be connected to the control cable. Now put the spring clip in place. Tighten the fasteners. When installing pipes, use sealant.

Where is the heating system on the domestic nine? How to disassemble and remove hoses for repair, for what reasons may the device stop working? If the VAZ 2109 stove does not heat up, first of all you need to understand the reasons why this is happening.

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