The heating system in VAZ cars is used to create a comfortable microclimate in the cabin. In summer, heating is not required, therefore, using a special faucet, the radiator of the stove is disconnected from the fluid supply system, which comes from the general cooling system. Whereas in the winter season, when the air temperature drops to minus and heat in the cabin becomes necessary, it is opened. Accordingly, after the restoration of the fluid supply, the VAZ 2107 stove begins to heat. It is located in the passenger compartment and is attached with four studs to the compartment partition on the engine. The junction with the car body is sealed with rubber seals.
Why is it cold inside
Often motorists remember the stove radiator only after the onset of the winter period. Sometimes, however, they catch on earlier. For example, when suddenly an antifreeze or water appears under the driver’s feet. But most often, motorists find out about a radiator malfunction when it gets cold and the cabin lacks warmth and comfort. And they have no choice but to change the stove VAZ 2107.
Design
The VAZ 2107 stove consists of a fan casing, a radiator having covers for the flow of air and its distribution. Cold streams passing through the heater are heated. The radiator is one of the main components due to which the VAZ 2107 stove works. It is equipped with nozzles: inlet and outlet. They are discharged into the engine compartment and connected to the cooling system of the car engine . The holes of their output are securely sealed with a rubber seal.
Principle of operation
The radiator in all VAZ models is fixed with two self-tapping screws, and the heater tap is built into the inlet pipe. It is a regulator of intake for coolant. It is possible to control it with the help of flexible traction from the lever located in the control unit in the ventilation system on
the instrument panel. Under the radiator, a VAZ 2107
stove motor is installed. Its electric motor is mounted on two elastic cushions placed in a guide casing. An additional resistor is also built into the motor
power circuit, providing a two-speed mode for fan rotation, the inclusion of which is ensured by a switch having three positions for operation and located on the
dashboard.The VAZ 2107 stove has air ducts extending from the casing of its fan. They direct the flow not only to the deflectors that blow the side windows, but also to those tubes that are directed to the windshield. It is possible to control the hot air by closing and opening the heater dampers one by one. The cover itself on the air intake is regulated by rods from levers located on the control unit.
Main disadvantages
Drivers who have been driving a Zhiguli for many years often say that the VAZ 2107 stove sometimes heats badly. The most common cause of malfunctions in a system such as a VAZ 2107 stove is a radiator leak, as well as pipes, faucets and connections located directly between them. To this can be added the switch failures for electric fan modes, damage to the device wires or oxidation of their components.
As a rule, these shortcomings can be corrected without resorting to buying new parts, but even with more complex malfunctions, serious and drastic measures are needed, for example, replacing the radiator of the VAZ 2107 stove, etc.
Causes of a malfunction in the heating system
Sometimes drivers notice antifreeze in the passenger compartment. The reason for this may be a rusted radiator or faucet stove, as well as its metal pipe. Accurate "diagnostics" can only be done with a visual inspection. If the defect lies, for example, in the nozzle or faucet of the stove, then they can easily be replaced, especially since today there are no problems with the purchase of any spare parts. In this case, you can not even disassemble the casing and the instrument panel. If the radiator itself is responsible for the leak of cooling antifreeze, then in this case there are two options for solving this problem. Firstly, if an old-style copper radiator is installed in the car, it can be repaired: solder, clean, tin, etc. The main thing is to find a good specialist. The second option is when a VAZ 2107 stove with an aluminum radiator is in the car. In this case, everything is a little more complicated: it must be replaced with a new one, since it cannot be repaired.
In some cases, after turning on the heater, cold air continues to be blown out of the air ducts of the car. The reason is a disturbance in the circulation of the coolant. This is due to the fault of a damaged heater tap or the radiator itself may be “clogged”. If the tap is stuck, it must be replaced, but in the second case, thorough cleaning is necessary.
Heater upgrade
All motorists know that the design of the VAZ 2107 stove is imperfect, and at the same time it works with noticeable noise even in the cabin. Therefore, this part of the vehicle heating system is often subjected to modernization. Many people try to improve the operation of the stove on their own, but more often than not, this proper effect is not obtained. With your own hands, even knowing how to remove the VAZ 2107 stove, you can only seal the joints of the ducts and nozzles, as well as redistribute the hot flows. However, from this the temperature in the cabin basically remains the same. And in order to keep the car warm and cozy in winter, it is necessary to increase the amount of heat supplied with a radiator. The whole problem is the stove fan, which is too small and does not create the necessary air flow. In this regard, as a rule, first of all, it is necessary to replace the fan of the VAZ 2107 stove.
If we compare the operation of this mechanism in two models of Zhiguli cars, we can see that the motor of the stove of the seventh Zhiguli model uses about four and a half amperes of current during rotation at a frequency of about three thousand revolutions per minute. And on the fan of the G8, with four thousand or more revolutions, three and a half times more is consumed. That is why modernization is needed. Sometimes even a radiator replacement for the VAZ 2107 stove is required.
Heater revision procedure
If the VAZ 2107 stove does not warm well, the casing is removed in the cabin on the bottom of the stove, on which a fan is mounted on top. The latter is completely removed due to its uselessness. After that, one of the aerodynamic ridges is carefully cut off, which supply warm air towards the feet of the driver and the passenger sitting next to him. This is especially true when installing a fan with a VAZ 2108, since its motor is slightly longer. The impeller can be completely removed, and its functions transferred to the five-blade standard fan.
The hole for this in diameter increases slightly so that a new shaft can be installed in it. It is important to ensure that the updated design is “planted” in place tightly and securely. Immediately before installing a new fan, it must be directly connected to make sure it is working.
For noiselessness
To this end, the built-in resistor is replaced, the main task of which is to provide relatively quiet operation for the fan. Moreover, the new one - with the VAZ 2108 - forms a lot of noise due to the greater amount of air flow being distilled. The best replacement option is a resistor, which is installed on the same eighth model. In addition, during modernization it will not be out of place to replace the fan switch, having installed the model from the same car as the whole structure, for example, from 2108. This is because the VAZ 2107 stove heats up during prolonged operation, as a result of which after a certain time standard power buttons simply melt. The noise from the upgraded and updated device, of course, will be slightly more than the factory one, however, this drawback is almost imperceptible in the colder winter time after the completion of the heater.
Care for the radiator stove VAZ 2107
During the autumn and summer periods of car operation, a lot of scale accumulates inside their heater radiators. And as a result, the efficiency of the system decreases. However, this malfunction can be eliminated. It is enough just to know how to disassemble the VAZ 2107 stove to clean it. This simple repair process can be done independently. For this, the motorist will need two worm clamps, two new rubber gaskets, several wrenches, coolant and a vessel in which the spent substance will be collected.
Operating procedure
The first step is to turn off the engine and allow it to cool. Under all branch pipes it is necessary to put fabric or rags. After that, you need to loosen the clamps on the mountings of both the outlet and inlet hoses, through which the coolant enters the engine compartment. Then, the rubber connecting from the tap and nozzles are removed, while under them, it is necessary to substitute the container. Using the socket wrench of the seventh number, you need to unscrew the screws on the fasteners on the seal, which must also be removed later. At the same time, the drive rod on the faucet of the stove with the fan casing is also disconnected. The pipes on the radiator are discharged from the hole located in the partition of the engine compartment. To do this, the bolts of the fasteners are turned off with a ring wrench of the tenth number. After that, the outlet pipe and radiator are removed. Replaced with a new one, the rubber gasket seals the flange joint. In this case, after removing the tap, clean the nozzles with hoses and the tap itself.
Radiator replacement
In general, when the VAZ 2107 stove does not work, a change in the radiator is necessary. Troubleshooting of the heating system on the Zhiguli models does not differ too much from each other. If the driver managed to figure out the cause of the cold in the cabin and he had no choice but to change the radiator, then for this he would need some tools. Two types of screwdrivers will be needed - the regular and Phillips, socket and open-end wrenches of the seventh, eighth and tenth numbers, as well as three rubber gaskets, one liter of coolant and a sealant, usually silicone. It is necessary to carefully inspect the radiator, its metal tubes and stove faucet. All of them should be without visible signs of corrosion or leakage. The faucet of the stove with the tube from the old radiator can be turned over to a new radiator. Be sure to install rubber gaskets, removing old ones. Having coated them with silicone sealant, you need to tightly, so as not to crush them or accidentally tear the threads, screw the outlet pipe and faucet to the radiator.
Assembly after replacing the old radiator with a new one is carried out in reverse disassembly sequence. After that, if necessary, antifreeze is added to it. Then the car starts, after which the tightness of the connection of the pipes and hoses is checked.