The situation when the refrigerator stops freezing or, conversely, turns food into an icy monolith, often indicates a malfunction of the temperature control system. In two-chamber models of the brand Atlant a thermostat is responsible for this process, which the user adjusts using a rotary knob. If you notice that the handle scrolls without characteristic clicks, is jammed, or the device has stopped responding to changes in position altogether, you will need to dismantle the unit for diagnostics or replacement.
Before taking active steps, you need to clearly understand the design of your unit. Thermoregulator can be located inside the refrigeration chamber or placed on an external panel, which is typical for more modern series. The type of location determines the set of tools and the sequence of operations that you have to perform to access the mechanism.
It is important to immediately prepare for the fact that the process will require accuracy. Plastic fastening elements in older models can be fragile, and sudden movements can lead to breakage of decorative overlays. In this article we will look in detail at how to properly remove knob and regulator casingwithout damaging the adjacent structural elements of the refrigeration cabinet.
Diagnostics of the malfunction and preparation of tools
The first step is always to accurately identify the problem. Users often confuse a breakdown of the thermostat itself with a breakdown of the start relay or compressor. If the compressor hums, but no cold is generated, or it is silent, although the chamber is warm, the problem may lie in the temperature sensor. However, if the regulator knob spins endlessly or does not make clicks when turning, this is a direct sign of mechanical destruction of the internal rod.
To carry out the work, you will need a minimum kit for a home handyman. The main tool will be a flat-head screwdriver, preferably with a thin and durable tip that can penetrate the narrow gaps between plastic parts. Also prepare a Phillips screwdriver for removing the screws and, possibly, a multimeter for later checking the thermostat contacts.
⚠️ Attention: Before starting any work on disassembling the refrigerator, be sure to disconnect it from the power supply. Working with live electrical components is dangerous and can result in a short circuit.
It is a good idea to prepare a container to catch possible drops of moisture if defrosting is required, although this is rarely required when replacing only the regulator. Make sure there is good lighting in the work area, as some fasteners may be hidden in the shadows or hard-to-reach places.
Design features of Atlant thermostats
Refrigerators Atlant are equipped with thermostats from various manufacturers, the most common devices are brand TAM or K-59. Despite the differences in markings, the principle of their fastening and interaction with the control handle is similar for most models. The mechanism is a bellows tube that responds to changes in refrigerant pressure inside the capillary, closing or opening an electrical circuit.
This mechanism is controlled through a plastic rod on which a decorative handle-lever is attached. It is this unit that is most often subject to wear. In older models, the handle could be solid, while in new series it often consists of several parts, including a decorative ring and an internal rotation transmission mechanism.
What is the difference between the TAM and K-59 thermostats?
The main difference is the length of the capillary tube and the response temperature range. K-59 series thermostats often have a longer tube and are designed for models with a No Frost system, while TAMs are more often found in refrigerators with a drip system. When replacing, it is important to select an analogue with identical markings or a complete functional analogue.
Understanding what type of regulator is installed in your refrigerator will help you avoid mistakes when ordering spare parts. If you plan to not only remove the regulator, but also replace it, write down the markings of the old device before dismantling.
Removing the temperature regulator handle
Removing the handle is the first and most critical step. In most cases, it is not secured with screws, but is held in place by a tight fit on the splines of the thermostat rod or internal mechanism. To remove it, you need to carefully pry the handle with a flat screwdriver at the junction with the body or panel.
Proceed carefully, trying not to damage the front panel of the refrigerator. Some models have hidden fasteners. If the handle does not come off with light force, do not use excessive force - inspect it more carefully. Perhaps there is a decorative plug in the center, under which the fastening screw is hidden.
☑️ Algorithm for removing the handle
After removing the handle, the thermostat rod and, possibly, a spring mechanism or a plastic adapter will open in front of you. In some modifications, there is an additional plastic sleeve under the handle, which must also be removed for full access to the thermostat housing.
Removing the protective casing and control panel
If your refrigerator is equipped with an external regulator on the external panel, then after removing the handle you will need to remove the panel itself or the protective casing. Fastening can be done with latches or screws. Carefully inspect the perimeter of the control panel.
Often the screws are hidden under decorative plugs or rubber pads. Use a thin screwdriver to remove them. If the panel is held on by latches, they need to be unlocked one by one, starting from the bottom edge or side edges, using a plastic card or a mediator so as not to scratch the plastic.
In models with an internal camera, the regulator is often built into the lampshade or located next to it. In this case, it may be necessary to remove the lamp shade. Usually it is attached with one or two screws, or is held on by latches that snap off when you press special tabs.
⚠️ Attention: Plastic becomes very fragile at low temperatures. If the refrigerator has just been operating, let it warm up to room temperature before actively working on the plastic latches to avoid cracks.
Access to the thermostat inside the refrigerator compartment
In classic two-chamber refrigerators Atlant the thermostat is often located inside the refrigerator compartment, in a corner or under a lampshade. To get to it, sometimes it is necessary to remove the top shelf or dismantle the plastic box covering the technical components.
The process involves unscrewing the screws holding the thermostat housing. Pay attention to the order in which they are located. The thermostat capillary tube is very thin and easily damaged. When removing the device, try not to bend the tube or yank it sharply.
For ease of operation, you may need to move the refrigerator away from the wall to provide access to the rear if the tube is routed out. However, in most cases, replacement or removal is carried out from the internal chamber.
Table of faults and solutions
Before finally disassembling the device, it makes sense to check the table of symptoms. This will help you understand whether the problem is really in the regulator, or whether a more in-depth diagnosis of the system is required.
| Symptom | Possible cause | Solution method |
|---|---|---|
| Knob spins endlessly | Broken rod inside the thermostat | Replacing the thermostat |
| The refrigerator does not turn on | Thermostat contacts do not close | Checking with a multimeter, replacement |
| Continuous operation compressor | Sticking contacts or leaking freon | Replacing the thermostat or refilling |
| The handle is difficult to remove | Freezing of moisture in the mechanism | Defrosting within 24 hours |
This table covers the most typical scenarios. However, it is worth remembering that the same symptoms can appear with different breakdowns. For example, constant operation of the compressor can be caused not only by a malfunction of the regulator, but also by a violation of the tightness of the circuit.
Checking and replacing the device
After you managed to remove the temperature regulator from the refrigerator Atlant, it needs to be checked. To do this, use a multimeter in dialing mode. The contacts should close when the temperature drops (if it is a normally closed contact) or open.
If you find that the device is faulty, replace it in the reverse order. It is important to correctly install the capillary tube in the seat so that it is in close contact with the cooled surface. Incorrect installation will result in incorrect temperature readings.
Assemble all the elements in reverse order. Reinstall the handle, making sure it is in the correct starting position. After assembly, turn on the refrigerator and check its operation for several hours.
Frequently asked questions (FAQ)
Is it possible to repair an old thermostat or just change it?
Repairing a thermostat at home is practically impossible and impractical. The device is hermetically sealed, and violation of its integrity leads to loss of sensitivity. In addition, the cost of a new regulator is low, which makes replacement more economical than repair attempts.
Why is the regulator handle removed with great effort?
Often the reason is the freezing of moisture that has gotten into the gap between the handle and the body. In this case, it is recommended to defrost the refrigerator within 24 hours. If the handle does not come off after defrosting, the plastic rod may have become deformed.
Which thermostat should you choose for replacement: TAM or K-59?
You need to rely on the markings installed on your old device. If there is no exact analogue, you need to select a thermostat with similar temperature characteristics and capillary tube length. There are no universal solutions, since the response ranges differ for different models.
What to do if the refrigerator does not freeze after replacement?
Check that the contacts are connected correctly. If the electrical circuit is assembled correctly, the problem may not be with the regulator, but with the compressor, start relay, or refrigerant leak. Further professional diagnostics are required.