Replacing the stove motor with a VAZ 2114

The problem of a non-working stove on the VAZ 2114 model is quite common. In most cases, the motor fails, which is responsible for supplying warm air to the passenger compartment. You can fix the malfunction without the help of car service specialists, just use the step-by-step repair instructions.

  • 1 Location and mode of operation
  • 2 Main causes of failure
  • 3 Replacement instructions

Location and mode of operation

On the latest VAZ models, the design of the heater is practically the same. The stove motor is located in the middle of the front torpedo, it operates in three modes. Using the regulator, you can select a specific heating zone - interior, windshield or legs. In the event of a fan breakdown, heated air remains near the radiator and does not enter the passenger compartment. In this case, the efficiency of the heating system drops to zero.

The stove motor operates in several modes

Root causes of failure

Most often, the system stops functioning normally for the following reasons:

  • F-7 30-A fuse does not work. The fuse is also responsible for the operation of the cigarette lighter, headlight washer, lighting in the glove compartment, so it is not difficult to identify this malfunction.
  • Oxidation of contacts on the motor unit.
  • The ignition relay is sticking. If the stove motor starts to work only after the engine warms up, then the reason is a faulty relay.

    Tip: For a specific exact reason for the poor performance of the stove, we recommend that you consistently exclude each of the above points.

    Replacement instructions

    If the motor starts to malfunction, then it is better to replace it with a new one right away, since it is almost impossible to set it up for normal operation. We recommend buying the device in official stores, where they give a quality guarantee. The average price for a motor is 500-600 rubles.

    List of tools and consumables

    Replacing the stove motor with a VAZ 2114

    What is a thermostat

    A thermostat is a discrete mechanical device that, when a preset temperature setting is reached, changes its state or the state of its electrical contacts.

    These contacts, for example, can be used in relay electrical circuits, starting or stopping various units or transmitting information about the temperature reached to the automation system of the process control system. The word itself comes from two Greek words: "θερµο-", which means warmth and "στατός" - standing, motionless.

    Unlike analog temperature sensors such as thermocouples or resistance thermometers, the thermostat will not show the actual temperature at a specific point in time. Its task is only to "work" at a preset temperature value, that is, to change its state. After that, depending on the type of thermostat, the actions required for the regulation are carried out.

    Thermostats are used in devices or systems that heat or cool something to preset temperature values. For example, in refrigerators, heaters, car engine cooling systems, industrial ovens, etc.


    What is this element? The thermostat is a small valve that controls the operation of the cooling system. The device performs the function of automatic transmission of coolant flows with different temperatures.

    What does the thermostat consist of and how does it work

    The design of the thermostat and its principle of operation depend on the type of sensor used. These can be bimetallic plates or metal capsules with capillary tubes filled with liquid or gas.

    A bimetallic plate is made up of two dissimilar metal strips with different coefficients of thermal expansion that are welded together. During heating, one of the metal plates expands more, which leads, when a given temperature is reached, to bend or straighten it.

    Moving mechanically in this way, the bimetallic plate can close or open electrical contacts or, for example, open a coolant valve.

    Another common type of thermostat is capillary. Its work is based on the first law of thermodynamics, according to which when the temperature changes in a thermodynamic system, it must perform mechanical work until it reaches an equilibrium state.

    The capillary thermostat includes the following elements:

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