Refrigerators Atlant deservedly considered one of the most reliable units in the post-Soviet space, however, even the highest quality equipment breaks down over time. Often, owners are faced with a situation where the compressor stops turning off or, conversely, does not start at all, and the temperature in the chambers no longer corresponds to the set values. In most cases, the cause of this behavior is a malfunction of the thermostat device responsible for maintaining the set temperature.
Independent replacement of this element is quite within the capabilities of a person who has basic skills in working with tools and understands the principle of operation of electrical chains. However, it is worth considering that the process requires care, since we are talking about interaction with electricity and refrigerant. Incorrect installation can lead to the fact that refrigerator the compressor will not work correctly or even the compressor will fail.
Before taking active steps, you need to make sure that the problem lies precisely in the temperature sensor, and not in a freon leak or motor failure. If you have already carried out diagnostics and decided to repair, then this article will become your detailed guide. We will analyze all the stages: from selecting the right part to the final setting temperature conditions.
Diagnostics and signs of thermostat malfunction
Before disassembling the equipment, it is important to clearly identify the symptoms. A thermostat (or thermostat) is a mechanical or electronic device that opens and closes an electrical circuit depending on the temperature in the evaporator. If this mechanism is “stuck” in the closed position, the compressor will work continuously, trying to cool the chamber to unattainable values, which will lead to the formation of a “fur coat” and excessive energy consumption.
In the opposite situation, when the contacts do not close, the refrigerator is simply silent. You may hear quiet clicking sounds, but the engine does not start. Sometimes incorrect operation is observed when the unit turns on too rarely, and the food in the main chamber begins to deteriorate, although it is still cold in the freezer. All these signs indicate that calibration the mechanism is broken or completely out of order.
For an accurate check, a multimeter is often used in the dialing mode. If, when the sensor is cooled (for example, by placing it in cold water), the circuit does not close, or it is constantly closed regardless of the temperature, the part requires replacement. It is also worth visually inspecting the bellows tube for creases and oxidation of contacts.
⚠️ Attention: Before any diagnostics and opening the case, be sure to disconnect the refrigerator from the power supply! Working with electrical appliances under voltage is deadly.
There is a common misconception that if the refrigerator does not freeze well, then you just need to turn the regulator knob to the maximum. This is not always the case: if the mechanism itself is destroyed inside, turning the handle will not have any effect. In such cases, it is necessary to install new thermostatcorresponding to the specific model of your Atlanta.
Selecting a suitable thermostat model
The spare parts market offers many analogues, but for refrigerators Atlant it is critical to choose a device with the right characteristics. The main difference lies in the temperature at which the contacts turn on and off, as well as in the length of the capillary tube. Using an unsuitable part will result in the operating modes of the compressor being disrupted.
Most often, in two-chamber models Atlant with one compressor, thermostats of the TAM or K-59 series are used. They may have different markings, for example TAM-133 or K-59 L1196. The numbers at the end of the marking often indicate the length of the capillary tube, which can vary from 0.73 to 2.5 meters or more. If the tube is too short, you simply will not be able to place it correctly in the evaporator.
It is also important to pay attention to the presence of a third contact for turning on the indicator lamp or fan (in No Frost models). If you install a thermostat without this contact in a model where it is provided by the circuit, the light will stop lighting or the airflow will stop working. Therefore, before purchasing, be sure to remove the old device and compare the markings.
| Marking | Refrigerator type | Tube length | Features |
|---|---|---|---|
| TAM-133 | Single-chamber / Double-chamber | 0.73 m - 2.5 m | The most common option |
| TAM-145 | Freezers | 0.73 m - 1.3 m | For low temperatures |
| K-59 | Two-chamber (Atlant) | 1.3 m - 2.5 m | Analogue TAM-133, often interchangeable |
| TAM-112 | Single-chamber | 0.73 m | With defrost button |
When choosing, pay attention to the build quality of the housing and the condition of the bellows tube. It should not have dents or traces of soldering, as this indicates a violation of the tightness of the filling system. It is best to purchase original spare parts or proven analogues from well-known brands, such as Danfoss or Thermo.
Is it possible to use a thermostat with a different tube length?
Yes, you can if the new tube is longer. The excess is neatly rolled into a spiral and hidden behind the back wall inside the case. The main thing is not to pinch the tube or damage its integrity. If the tube is shorter than required, it will not be possible to install it without violating the technology.
Preparation of tools and workplace
To successfully replace the thermostat in the refrigerator Atlant no complex industrial equipment is required, but a set of tools should be on hand in advance. The bulk of the work will have to be carried out in cramped conditions, so lighting and access to the unit play a key role. Clear the space in front of the refrigerator in advance and remove all food from the compartments.
You will need the following set of tools:
- 🔧 Screwdrivers (Phillips and flat) - for removing panels and dismantling fasteners.
- 🔧 Pliers or pliers - for working with clamps and removing the tube.
- 🔧 Multimeter - to check the integrity of the circuit before installation.
- 🔧 Hair dryer (construction or household) - may be needed to defrost the ice around the tube.
- 🔧 Electrical tape or heat shrink - to insulate connections.
It is important to ensure good lighting of the work area, since inside the refrigerator compartment, especially at the back wall, it is often dark. If you change the thermostat in a model with a system No Frost, access to the evaporator may be limited by plastic covers that will need to be carefully removed.
☑️ Ready for repair
Removal of old thermostat
The process of removing the old device begins with dismantling the plastic covers. In refrigerators Atlant the thermostat is usually hidden under the top cover inside the refrigerator compartment or in the control unit in the case of electronic models. In mechanical models, the regulator handle is often simply removed by hand, after which the fastening nut is unscrewed.
After removing the decorative panel, you will see the thermostat body itself and the capillary tube coming out of it. It is introduced into the evaporator through a special hole in the rear wall of the chamber. The main task at this stage is to carefully remove the tube without damaging it or compromising the integrity of the evaporator. Often the tube sticks to the walls or freezes.
Proceed as follows:
- Take a photo of the wire connection diagram before disconnecting so as not to mix up the contacts when installing a new element.
- Unscrew the mounting screws holding the thermostat housing.
- Carefully pull the tube out of the hole in the chamber. If it is tight, you can slightly warm the outlet with a hairdryer, but do not overheat the plastic.
- Disconnect the wire terminals. They may fit tightly, use pliers carefully so as not to break the plastic clips.
⚠️ Attention: The capillary tube is very thin and fragile. Under no circumstances bend it at an acute angle or pull with excessive force, otherwise it will burst and the refrigerant will evaporate.
In some models Atlant the thermostat tube is additionally secured with a metal plate or clothespin on the evaporator. It must be bent or unscrewed to release the sensor. After removing the old part, compare it with the new one: the length of the tube, the location of the contacts and the fastening must match.
Installation of a new thermostat and connection
Installation of the new device is carried out in the reverse order of dismantling. First, you need to correctly insert the capillary tube into the evaporator. The immersion depth should be the same as the old sensor, usually 30-40 cm from the exit from the chamber wall. If the tube of the new thermostat is longer, its excess is neatly rolled into a ring and placed outside the refrigeration chamber, under the housing.
Attaching the sensing element to the evaporator is a critical moment. The tube must fit tightly to the surface of the evaporator; often a special pressure plate is used for this. It is through the evaporator wall that the refrigerant temperature is transmitted to the bellows of the thermostat. If the contact is poor, thermostat it will work with a long delay.
Connecting the electrical part requires special care. Mechanical thermostats usually have three contacts:
- 🔌 Mains contact (phase).
- 🔌 Compressor contact.
- 🔌 Indication lamp (or fan) contact.
Use the photographs taken earlier to connect the wires to the correct terminals. The color marking of wires in different modifications Atlant may differ, so you need to rely on the diagram or photo. After connecting, check that the terminals are securely fastened - they should not fall off due to vibration.
After installing all components in place, secure the thermostat housing and return the decorative trims. Make sure that the adjustment knob rotates freely and does not touch adjacent structural elements. Only after a visual check can you proceed to testing.
Setting up and checking the operation of the system
After you have installed a new thermostat, you cannot immediately load the refrigerator with food. The unit should be idle so that you can monitor the on and off cycles. Turn on the refrigerator and set the control knob to the middle position (usually the number 3 or 4).
The first operating cycle may be longer than usual, since the system needs to reach the initial temperature. The compressor should turn off when the temperature in the chamber reaches the set value. If the refrigerator runs non-stop for more than 2-3 hours, perhaps the thermostat does not “see” the cold or is set to too low a temperature.
Pay attention to the following parameters:
- ❄️ The temperature in the main chamber should be within +2...+5°C.
- ❄️ B in the freezer, the temperature should drop to -18°C and below.
- ❄️ The intervals between compressor starts should be at least 10-15 minutes.
If there are “non-starts” (the compressor sits for a long time, the chamber gets warm) or “under-turns” (ice freezes), additional adjustment. Some thermostats have a screw under a seal, the rotation of which changes the temperature range. However, it is not recommended to turn it without special equipment and experience - it is better to choose a thermostat with the correct factory calibration.
Frequent errors and troubleshooting
Even if they follow the instructions, beginners can make mistakes that will lead to unstable operation of the equipment. One of the most common problems is insufficient immersion of the capillary tube. If the sensing element is in a warm zone, the refrigerator will work all the way, trying to cool the sensor, which will lead to food freezing.
Another common mistake is poor electrical contact. Sparking in the terminals leads to burning of the contacts and eventual failure of not only the thermostat, but also the compressor. Always check the tightness of the terminals. Also, do not forget about grounding if the design of the refrigerator body Atlant requires it.
If after replacing the thermostat the problem does not disappear, it may not be the problem. Check:
- The tightness of the system (if there is a freon leak).
- The functionality of the compressor starting relay.
- The condition of the door seals (warm air leaks).
⚠️ Attention: If you are not sure If the refrigerator is behaving strangely or after replacing the thermostat, it is better to contact a professional technician. Independent repair of complex equipment always carries risks.
Remember that the quality of spare parts directly affects the service life of the unit. Cheap Chinese analogues can fail after six months, while original components last for years. Take care of your equipment and approach repairs responsibly.
How much does it cost to replace a thermostat at a service?
The cost consists of the price of the part (from 1000 to 2500 rubles) and the work of the technician (from 1500 to 3000 rubles). Replacing it yourself allows you to save on work, but requires time and accuracy.
Is it possible to temporarily do without a thermostat?
Theoretically, you can close the contacts so that the refrigerator works constantly, but this will lead to rapid freezing of the evaporator and possible combustion of the compressor. This is an emergency mode, not intended for continuous operation.
Why does the new thermostat click but does not turn on?
The click means that the contacts open or close, but no current flows. Check the reliability of the wire connections in the terminals. Perhaps the contact has oxidized or the wire is broken inside the insulation.
Is it necessary to defrost the refrigerator before replacing it?
Yes, definitely. The presence of ice will make it difficult to access the evaporator and capillary tube, and can also lead to damage to the plastic elements during dismantling.