Replacing the faucet of the VAZ 2109 stove high and low panel: instructions

Radiator check

In most cases, there is a failure of one part of the VAZ-21099 stove. The check can begin with the radiator of the heating system.

In this case, it is advisable to carry out the check after any of the following manifestations appear in the cabin:

• specific smell;
• steam coming from exhaust vents;
• rapid evaporation of the liquid used for cooling.

In such situations, it is initially recommended to check the radiator, and any actions are best carried out after the engine has been turned off and it has had time to cool down.

If, nevertheless, no problems were found in the radiator, most likely the VAZ-21099 heater valve will need to be replaced. However, additional steps are required before this happens.

First of all, you need to carefully inspect the radiator you are using for potential leaks and the condition of its design.

How to check the radiator before understanding whether the heater valve of a VAZ-21099 car needs to be replaced or not.

1. At the very beginning, you need to disconnect and remove the car battery.
2. After this, the antifreeze is drained from the cooling system.
3. The next stage is the sensor and motor.
4. Now you can remove the casing fasteners and carefully disconnect all the wires.
5. In addition, you can remove the protective cover.
6. The final stage is to disconnect the hoses, slightly tilt the radiator to the side and pull the part out.
7. In most cases, replacement of rubber shock absorbers installed on special radiator holders is required.
8. After removing the unit, you will need to install tight plugs on the pipes or holes to which they are connected. According to this scheme, air is gradually pumped into the radiator. It is important to note that the air pressure should not exceed 0.2 MPa. Then it is allowed to lower the radiator into a bath of water, remembering that the unit must be completely covered. The appearance of air bubbles indicates a leak in the seal and the need to replace the radiator. If there are no bubbles, the unit is only clogged and requires flushing to clean it.

After the preliminary action, care should be taken to adjust the tap of the VAZ-21099 stove and ensure full heating of the car interior.

Malfunction - characteristic symptoms

The following signs indicate that the faucet is leaking:

• traces of liquid are found on the floor in the cabin;
• A characteristic smell of antifreeze appeared in the car.

Having discovered one of the above symptoms, it is necessary to inspect the failed unit. It is important to understand that if the breakdown is not repaired in a timely manner, then repairs will subsequently cost much more money, and it will most likely not be possible to do it yourself.

How to perform an inspection? You will need to get under the hood on the engine side. It should be noted that leaks can occur in various places in the cooling system, so you will need to inspect the entire system.

It is more convenient to do this with a flashlight. Coolant, in particular, often drips from:

• radiator;
• joints of hoses and pipes.

When it turns out that the faucet is the culprit of the malfunction, the owner needs to start replacing it as soon as possible.

This requirement is even more relevant if it is winter, because without heating in a car it will be very uncomfortable to move and, moreover, dangerous if you have a long trip through a sparsely populated area.

Why do you need to change the valve on the VAZ-21099?

In most cases, the VAZ-21099 heater valve is replaced if it has serious malfunctions. In this case, two potential malfunctions are noted.

1. The faucet turned out to be “sour”. As a result, it is impossible to open or close it. In this case, you can postpone carrying out repair activities.
2. The second reason is that the stove faucet is leaking. This malfunction can cause significant trouble, so it should be eliminated urgently. If nothing is done, a serious leak of antifreeze into the car interior cannot be avoided. Despite the fact that the VAZ-21099 heater valve is hidden by a high panel, there is a risk of undesirable changes that will appear even in the situation in the car showroom.

For the reasons described above, you need to understand why you should change the faucet of the VAZ stove.

Recommended Actions

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.

Purpose of the heater valve on the VAZ 2109

On the VAZ 2109 there are two circles of coolant movement: large and small. When the coolant flows in a large circle, it, having warmed up in the main radiator, leaves it for the heater radiator and heats it up. An electrically driven fan is installed behind the heating radiator. It blows air through the radiator and forces hot air into the cabin through an air duct system. In this way, the interior of the VAZ 2109 is heated. However, in the warm season there is no need to circulate antifreeze in a large circle.

Using a heating tap, the driver changes the direction of movement of antifreeze

Therefore, drivers switch the heating system to a small circle when the coolant does not enter the heater radiator. To switch, a heating tap is used, the purpose of which is to direct the flow of coolant into the desired pipeline depending on the season.

Heater valve location

The heating valve on the VAZ 2109 is built into the front wall of the engine compartment so that one pair of valve tubes is discharged into the engine compartment, and the second pair is discharged into the cabin, under the center console.

The heating valve is located deep under the central panel of the VAZ 2109

In order to get to the crane, the car owner will first have to dismantle this console. There are no other options.

Heating tap failure and its cause

It is impossible not to notice a breakdown of the heating valve on a VAZ 2109: a puddle of antifreeze appears on the floor of the cabin, on the front passenger side, and a characteristic sweetish smell is clearly felt in the cabin.

There are two reasons why a heating tap breaks:

• poor quality faucet. They are equipped with membrane taps, the tightness of which leaves much to be desired. Their service life is very short;
• corrosion. It's simple: in the warm season, all motorists turn off the heating tap. They run for three or four months with the tap closed. During this time, the valve stem becomes covered with rust and is literally welded to the body. Sometimes things get so bad that you can only turn a rusted faucet using pliers. Of course, there can be no talk of any tightness after such an operation.

What is hidden under the panel in the car interior?

The “refrigerator effect” becomes most noticeable if you still continue to use old VAZ models with front-wheel drive: 2108, 2109, 21099. Let's try to figure out whether there is any possibility of replacing the heating system yourself. Despite the visual identity of the car models, there is still some difference in these VAZ units of the 8th and 9th models.

This difference is not fundamental. It’s just that in the process of evolution, unnecessary air ducts were removed from the design, the shape of the damper and the location of the radiator were changed. But this does not change the principle of operation. The interior is heated by air, a radiator connected to the engine cooling system is responsible for heating it, and the heater itself is located under the instrument panel in the car, which is higher in the VAZ 21099 due to some design features of the stove. With the help of connected air ducts, heat flows into the interior.

Radiator in the engine cooling system

To force heated air into the cabin, a fan is located at the top of the heater, which rotates using an electric motor. The easiest way to access it is from the engine compartment. The heater radiator, mentioned above, is located in the VAZ 2109, 2108 and 21099 models near the heater itself. It has a seal in the form of a polyurethane foam gasket and consists of two plastic tanks, cooling plates and tubes arranged in two rows.

Since heating is connected to the car’s cooling system, fluid circulation through the radiator occurs using the pump of this system. You can regulate its flow using the heater tap and various levers that affect the position of valves and dampers. Warm air enters the cabin through two central and two side nozzles, inside of which there are dampers that regulate the intensity of heating. The direction of flow is also changed by blades-blinds using levers in the cabin.

After the air in the cabin is heated, it is necessary to circulate it and maintain the set temperature. It is necessary to release the waste stream outside. In this regard, on VAZ 2108 models, hot air flows out through holes located in the central body pillars. On 9-model cars, these holes are located in the corners of the rear side windows and have rubber valves that prevent atmospheric air from entering the air ducts.

Selecting a heating tap and cost of the part

A driver faced with a leaking heating tap will inevitably be faced with the question: which tap to buy as a replacement? The question is not as simple as it might seem at first glance. Because there are three types of heating taps, which differ not only in cost, but also in design. Let's list them:

• faucet with membrane. This is exactly the crane that the manufacturer installed on the “nines” that came off the production line. Cost - from 400 rubles. This is the cheapest faucet that can be found on the market today. However, the low price should not deceive the car owner: the reliability of membrane taps leaves much to be desired. And you can purchase them only in one case: when you couldn’t find anything else;
• ball valve As the name suggests, the locking element in this device is a massive ball, which is much more reliable than a standard membrane. However, the above ball is made of steel. And therefore susceptible to corrosion. Therefore, a car owner who decides to open the tap with the onset of cold weather may be in for a very unpleasant surprise. The cost of such a crane starts from 550 rubles;
• ceramic faucet. The most reliable and at the same time the most expensive option. Corrosion is not a problem for such devices: their body is made of plastic, and the antifreeze is locked by two tightly pressed ceramic plates. The cost of a ceramic faucet starts from 700 rubles, and if the car owner is not short of money, then ceramics should be purchased.

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.

Replacing the heating valve on a VAZ 2109

Before starting work, let's decide on consumables and tools. Here they are:

• new furnace tap;
• a pair of steel clamps for hoses with a diameter of 20 mm;
• canister of new antifreeze (4 liters);
• metal brush to remove rust;
• a set of rubber gaskets for the heating tap VAZ 2109 (in case the old ones are worn out);
• silicone-based automotive sealant;
• a pair of screwdrivers: Phillips and flat;
• socket heads for 13 and 10;
• set of open-end wrenches.

Sequence of operations

First of all, you need to pay attention to two points. Firstly, it is most convenient to change the stove valve in the inspection hole. At least on an overpass. And secondly, before replacing the valve, the engine must be allowed to cool properly, and the antifreeze mode regulator should be set to the “hot” position. This will allow the antifreeze to completely drain from the heating radiator.

1. A container is installed under the car standing on the pit to drain the old antifreeze. The cap on the radiator is unscrewed and the coolant is drained.
2. Under the hood there is a pair of hoses attached to the faucet pipes using clamps. These clamps are thoroughly cleaned of dirt with a wire brush. If they are very rusty, you can use WD40. Once the rust is gone and the bolts on the clamps begin to move, the clamps are loosened using a flathead screwdriver.

As a rule, a lot of rust and dirt accumulate on the heating tap clamps

The side panel is held in place by two self-tapping screws, unscrewed with a Phillips screwdriver.

After removing the panel, access to the tap opens, you can loosen the clamps and remove the hoses

The faucet is held on by three 10mm nuts; they can only be removed with a socket head

The faulty faucet has been removed from its niche - a new one can be installed

Video: changing the heating valve and radiator on a VAZ 2109

So, replacing the heating valve on a “nine” is a task that even a novice car enthusiast can do. All you need to do is follow the recommendations above and remember to drain the coolant before starting work.

Cable location

Gazelle stove faucet business electrical connection diagram

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.

Radiator device for heating system

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Stove tap device

Externally, the faucet of the VAZ 21099 stove from the interior looks like this:

The arrow points to the valve control lever, which is driven by a sheathed rod (“cable”). The tap on the passenger compartment side is connected by pipes to the heater radiator, on the engine compartment side - to the cooling system.

In the photo above it is in the open state, corresponding to the extreme right position of the knob on the stove control panel (bottom photo).

“Souring” of the damper prevents the valve from opening/closing, while incorrect adjustment of the draft increases the free movement of the lever, as a result of which the damper does not open completely and interferes with coolant circulation.

Where is the heater valve installed on the VAZ 21099?

The part is attached to the front panel with two M6s (10 wrench). In the cabin it is located almost exactly in the center of the car, near the floor. The photo shows a view of the faucet with the instrument panel, heater assembly, console and floor tunnel casing removed:

As you can see, it is installed from inside the cabin and secured with two M6 bolts (or studs); the nuts are screwed onto them from the engine compartment side.

In the engine compartment it is located under the steering rack:

Replacing the faucet of a VAZ 21099 stove with a high panel with your own hands

Before work, drain the antifreeze from the cooling system - in any way convenient for you. If the heater tap is replaced on an injection machine, disconnect the battery. Loosen the clamps and remove the pipes from the tap fittings.

Remove the floor tunnel and console. If the engine is fuel-injected, then disconnect the block from the ECU (“brains”) mounted inside the console. Having removed the pipes from the tap fittings on the interior side, unscrew the nuts securing it located outside and remove the tap along with the seals.

Before installing a new product, check the damper lever linkage adjustment. The rod shell is secured with a special metal clamp:

By changing the position of the shell, ensure that the tap closes and opens completely when moving the lever on the panel.

Before connecting the pipes, apply sealant to the tap fittings - as a preventive measure against antifreeze leaks.

Having completed the repair, proceed to pouring antifreeze. After opening the expansion tank cap, fill to about. Close the lid and start the engine, and when the coolant temperature begins to rise, turn it off. After opening the lid, wait until the level drops and add liquid to the maximum mark.

Sometimes this procedure has to be repeated up to three times. The pressure generated in the cooling system when the tank is closed will gradually “push out” the air pockets.

Execution of work

The car must be placed on a pit or ramp. Its wheels are fixed with stops. You should start working no earlier than the engine has cooled down. Don't forget to apply the handbrake! You will also need to disconnect the battery - it will be enough to remove the negative wire from it.

It will not be possible to do without draining the antifreeze. Therefore, the prepared container is placed under the hole intended for this purpose and, unscrewing the plug, wait until the coolant drains out completely.

Next, you need to disconnect the pipes connecting the engine directly to the mechanism that has become unusable. The fastening clamps on them are loosened. Use a brush to clean the threads on the two studs that hold the heater tap itself. As reviews indicate, without WD40 it is most likely impossible to easily remove a faulty unit.

Only after this can you completely unscrew the clamps and remove the pipes. Please note that sometimes some antifreeze remains in them. You should be prepared for this and have a vessel ready. To avoid getting your hands dirty, you should also wear gloves.

Having completed the work on the hood side, you need to go to the interior. It will also be impossible to do without removing the torpedo, or rather, its side panel. Having opened access to the remaining pipes, they are dismantled. In those situations when it turns out that they have completely retained their properties and do not need to be replaced, they will only need to be disconnected from the tap. And coolant often leaks from these pipes - be prepared for this.

After the tap has been rid of the tubes, we move again under the bottom of the vehicle. Here, using a 10mm wrench, unscrew the nuts holding the above element in place. Then, returning to the salon, they pull out the tap itself, removing the spring retainer. Only after this is it possible to dismantle the cable leading to the regulator.

When installing a new mechanism, do not forget to return the rod to its place.

Reassembly is carried out in reverse order.

As practice shows, quite often car owners leave the old gaskets behind when replacing the faucet itself. This should not be done under any circumstances. Even if the seals look good, they still have a very limited life and can quickly become unusable. The new ones are supplied complete and you won’t have to spend extra on them.

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.