Repair of a temperature regulator of a refrigerator

Not every user knows that home appliances, including refrigerators, can be repaired by hand without contacting a service center. Even a novice master can cope with simple breakdowns. Today we will try to deal with the question of how to repair the temperature regulator of the refrigerator, as well as what kind of device it is, what its purpose and parameters are.

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What is a temperature regulator and what is it for?

To get started, let's figure out what it is. A thermostat, or thermostat, is a device that monitors the temperature in your refrigerator, and then sends signals to the compressor, forcing it to turn on and off, depending on the level of cooling inside the chamber.

It works quite simply. The temperature controller is a relay:

  • On one of its sides is a special hermetically sealed tube, which is filled with freon.
  • On the other hand, there are electrical circuit contacts, and with their help the compressor is controlled.
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Operating principle

Everything works quite simply:

  • The end of the capillary tube is attached to the evaporator. Based on the fact that it is filled with refrigerant Freon, with increasing temperature inside the refrigerator, the pressure in it increases.
  • Due to this, the corresponding relay contacts are closed, and the compressor is also turned on.
  • After some time, the temperature in the refrigerator compartment drops, the pressure in the tube drops, and the contacts open, then the compressor turns off.

Another quite important component of the thermostat is the spring, which compresses and expands its contacts. It depends on her how and at what time they will work. For example, to open contacts with a small pressure in the system, less effort is needed, for a large pressure - more. The spring tension is adjusted using the thermostat shift knob.

Sometimes an electronic temperature controller is installed in refrigerators, which consists of a control module and a temperature sensor. In new models, several sensors may well be installed at once, for each of the cooling zones. If your refrigerator has an electronic temperature control mode, in order to repair it, you may need special knowledge.

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Where should I look for the thermostat of the refrigerator?

The temperature controller is always connected to the temperature setting button or the handle in the chamber. Depending on the refrigerator, the temperature controller may be:

  • inside the refrigerator compartment;
  • outside the refrigerator.

Inside

This arrangement is characteristic of earlier models of Nord brand refrigerators and others. If you open the refrigerator compartment, you can see a small plastic box that is placed on one of the panels. This is precisely what the thermostat is.

Outside

New refrigeration units are arranged in a slightly different way. In them, the device you need is located outside the compartments of the refrigerator, as a rule, it is located in the upper section of the refrigerator, above the door itself. But it can also be in a different place.

Important! In any case, there is only one principle: the temperature controller is located where the switch knob is. To get to it, you must remove all the protective elements.

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Signs of damage to the temperature relay:

  • The refrigerator works without stopping and does not turn itself off.
  • The unit begins to freeze quite strongly inside the refrigerator compartment - where, in the normal mode, there should be a low, but still plus temperature.
  • The refrigerator shuts off spontaneously and then no longer sounds.

Important! Any compartment of the refrigerator should be in good condition and perform its functions well. If you notice a malfunction, then follow the link to understand how to solve the problem, when in the fridge samsungthe top camera does not work

We now consider each of these situations separately to understand how the repair of the thermostat of the refrigerator occurs.

The refrigerator does not turn off on its own

In order to make sure that the cause of the breakdown of the refrigerator is the temperature controller itself, do this:

  1. Disconnect the refrigerator from the power supply.
  2. Remove food from it and thaw thoroughly.
  3. Slide the thermostat knob to the “Max” position or turn on the freezing, if any.
  4. On the middle shelf of the refrigerator, but not the freezer, place the thermometer - it would be better if it also has a negative measurement scale.
  5. Turn on the refrigeration unit, empty, no food.
  6. Wait about 2 hours, then quickly remove the thermometer and evaluate its performance.

Disconnected and shut up

There can be as many as 3 reasons:

  • the temperature regulator is broken;
  • motor start relay burned out;
  • burned out engine of the refrigeration unit.

The last two reasons, of course, are incredibly serious. But at the moment we are interested in the first one. In order to make sure that you need to replace the thermal relay directly, you need to check it:

  1. Turn off the power refrigerator.
  2. Find the location of the thermal relay, and then remove the protective covers.
  3. Carefully inspect the appliance.

Important! By default, the temperature controller has three to four multi-colored wires. One of them is usually yellow in color with a longitudinal green stripe. This is the ground wire. We don’t need it, so put it aside so as not to accidentally hook it. Absolutely all the wires that let the thermal relay close directly to each other. If, after connecting the refrigerator to the power supply, you hear an even sound (buzzing) of the engine, this means that the temperature controller itself has failed, and you will be forced to replace it with a new one.

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Temperature Relay Replacement Procedure

Repairing the refrigerator thermostat yourself will not take a lot of time. For example, take the refrigerator "Nord":

  1. Remove the upper hinge pad and unscrew the bolts.
  2. Remove the refrigerator compartment door.
  3. After that, remove the plug directly in the roof of the refrigerator and unscrew one screw - as a rule, it has a built-in hexagon.
  4. Unscrew the screws that hold the roof, remove it.
  5. Remove the temperature control knob.
  6. Pull out the temperature control, before unscrewing the 2 screws that secure the bracket.
  7. Replace the node with a new one and perform all the steps, but in the reverse order.

Important! Sometimes the freezer can malfunction and the entire system is broken, which leads to spoilage of products. Learn some helpful tips on how to get out of the situation if the upper chamber of the refrigerator Indesit Nou Frost does not freeze.

By and large, wherever the thermostat is located, its repair looks approximately the same:

  1. Get directly to the detail.
  2. Disconnect the capillary tube from the evaporator body itself.
  3. Gently pull it directly out of the housing.
  4. Disconnect the relay.
  5. Oremontas as carefully insert a new bellows tube, and then securely fasten it to the evaporator itself.
  6. Connect all the necessary wires and attach the relay in place.

After the repair work on the replacement is completed, it is necessary to check the serviceability of the equipment. Read on our website about How to set the temperature in the refrigerator Samsung Nou Frost.

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Videos

Now you have an idea of ​​what a refrigerator thermostat is, how it is being repaired. This task, subject to the right approach, is quite feasible for the master, who is not the first time holding a screwdriver and a multimeter in his hands.

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