Failure of the temperature control system - one one of the most common reasons for contacting service centers, but in many cases the user is able to cope with the problem on his own. If your Veko refrigerator stops turning off, works without stopping, or, conversely, does not get cold, in 80% of cases the culprit is a failed thermostat. This small device controls the operation of the compressor, closing and opening the electrical circuit depending on the temperature inside the chambers.
Replacing a part requires care and compliance with safety precautions, since you will be working with electrical components and refrigerant. It is important to understand that incorrect installation or leakage of the capillary tube can lead to freon leakage, which will require expensive refilling. In this article, we will analyze in detail the algorithm of actions that will allow you to correctly dismantle the old sensor and prepare a place for installing a new element.
Before starting any manipulations, you must completely turn off the power to the unit by unplugging the plug from the socket. Ignoring this rule may result in electric shock or short circuit in the control board. You will also need to prepare a set of tools: screwdrivers (Phillips and flat-head), a multimeter for checking the circuit and, possibly, pliers for removing clamps.
Diagnostics of thermostat malfunction
Before disassembling the equipment, you should make sure that the problem lies in thermostatand not in the compressor or freon leak. Symptoms can vary: from a constant humming of the engine to a complete absence of cold. Users often confuse a sensor breakdown with a clogged capillary system or a malfunction of the start relay.
If the refrigerator Eko works continuously, without turning off even at night, and at the same time a “fur coat” forms in the freezer compartment, and food begins to freeze in the refrigerator compartment, this is correct a sign of sticking thermostat contacts. Otherwise, when the compressor is silent, but it’s warm inside, the contacts could oxidize or separate, not allowing current to pass through.
⚠️ Attention: If the refrigerator makes strange sounds (gurgling, clicking) and does not cool, but the compressor starts and immediately stalls, the problem may not be thermostat, but in the motor or refrigerant circulation system.
For an initial check, you can try knocking on the regulator body or sharply turning the temperature setting knob. If the compressor starts or, conversely, stops, it means that the mechanical part of the device is worn out. However, for accurate diagnostics, it is necessary to test the contacts with a multimeter in a cold and warm state.
Preparation of tools and safety
High-quality repairs are impossible without the right tools. You will need not only basic screwdrivers, but also specific tools that will help avoid damage to the plastic elements of the case. Plastic in refrigerators Beko can be fragile, especially if the unit has been in use for a long time.
Be sure to check the serviceability of your measuring device. The batteries in the multimeter must be fresh and the probes intact. This is critical for accurate diagnosis electrical circuit. Also prepare a container for collecting water, since during defrosting (if required), the liquid may flow onto the floor.
☑️ Preparation for repair
The workplace should be well lit. Using a headlamp will make working inside cells, where it is often dark, much easier. Do not forget that any work is carried out only on a completely defrosted and dry refrigerator.
Location of the thermostat in Beko models
The location of the thermostat depends on the specific model of your refrigerator Eko. In older single-compartment models and some mechanically controlled two-compartment units, the regulator is often located inside the refrigerator compartment. It can be hidden behind a plastic panel or built into the housing next to the light bulb.
In more modern models with a system No Frost or electronic control, the thermostat (or temperature sensor) can be located behind the rear wall of the refrigerator compartment or even in the engine compartment below. In some cases, access to it is possible only after dismantling the top cover of the refrigerator.
| Model type Beko | Thermostat location | Access |
|---|---|---|
| Mechanical (old) | Inside the refrigerator cameras, top left | Removing the lamp shade or panel |
| Two-chamber (classic) | Behind the top cover of the case or inside | Removing the cover or panel |
| No Frost / Modern | Behind the back wall or in the engine compartment | Complete disassembly of the camera or bottom |
The model of your device indicated on the sticker inside the camera will help you determine the exact location. If you are not sure where exactly the sensor is located, look for a photo of your model on the Internet or use the technical manual.
How to find the refrigerator model?
The model and serial number are usually indicated on a silver or white sticker located on the inner wall of the refrigerator compartment (left or right) or on the base at the bottom of the door. Look for a code starting with letters, for example, RCNE or CSK.
The process of removing the thermostat
Once you have reached the assembly, carefully inspect the fasteners. The thermostat is usually secured with plastic clips or screws. Carefully remove the temperature control knob, if it is removable, by pulling it towards you. Then unscrew the fasteners holding the device body.
The most important thing is the capillary tube that comes out of the thermostat body and goes into the evaporator. It is very thin and breaks easily if handled carelessly. It must be released from the fixing clips on the chamber wall. Proceed slowly, without sudden jerks.
Next, disconnect the electrical wires. Before doing this, it is strongly recommended to photograph the connection diagram or mark the wires with a marker so as not to confuse them during assembly. Usually two or three wires (phase, neutral and ground) are suitable for the contacts.
⚠️ Attention: The capillary tube is filled with freon under pressure. If you damage its integrity during removal, the thermostat will have to be thrown away, and oil or gas may get into the chamber.
After disconnecting the wires, carefully remove the old device. If the tube is stuck in the insulation hole, do not pull by force - it is better to slightly widen the hole or gently push the tube inside, holding the housing.
Checking the serviceability of the removed sensor
The removed thermostat must be checked with a multimeter to confirm the diagnosis. Switch the device to continuity or resistance measurement mode. Connect the probes to the contacts where the wires went. In normal condition (at room temperature), the contacts should be closed, and the multimeter will show zero or a value close to it.
For a complete test, place the sensitive part of the thermostat (capillary tube or bottle) in a container of cold water with ice for 2-3 minutes. After cooling, the contacts should open and the device will stop beeping. If this does not happen, it means thermostat it is faulty and requires replacement.
Sometimes the contacts burn out, creating a high resistance, which the multimeter may not show as a break, but the compressor will not work because of this. Visually inspect the contacts: if they are black or melted, replacement is required.
Installing a new thermostat
When purchasing a replacement, make sure that the new thermostat has similar parameters: capillary tube length, temperature range and type of contacts. For refrigerators Eyelid TAM or K59 series sensors are often used, but it is better to select them according to the original catalog number.
Installation is carried out in the reverse order. First, carefully lay the capillary tube along the same path as the old one, securing it in the standard clips. Make sure that the tube is not pinched or kinked anywhere, otherwise the refrigerant inside it will not be able to respond correctly to temperature changes.
Connect the wires according to the diagram or photograph made earlier. Make sure the connections are secure and not loose. Secure the thermostat housing in place and install the adjustment knob. Check whether it rotates freely and does not touch adjacent elements.
After assembly, do not rush to plug in the refrigerator. Let the system sit for 15-20 minutes, especially if you have been holding the tube for a long time (body temperature may have warmed the gas inside). This will allow the internal pressure to stabilize.
Frequent errors when replacing
One of the common mistakes is ignoring the length of the capillary tube. If the new tube is longer than the old one, the excess should not be twisted into a tight ball or cut off. The excess length must be carefully laid in a snake in the free space, without creating loops with a small radius.
Also, beginners often confuse the wires, especially if there are three of them. Converting phase and ground can result in a potentially life-threatening potential appearing on the refrigerator body. Always double-check the color coding and diagram.
Another mistake is installing a thermostat with the wrong temperature range. If you put a sensor from the freezer in the refrigerator compartment, the food will either defrost or turn into ice. The marking usually contains numbers indicating the range (for example, -24...+4 degrees).
⚠️ Attention: Technical characteristics of refrigerators may vary depending on the year of manufacture. Always check the parameters of the part with the markings on the body of your specific device before purchasing a new one.
Is it possible to repair an old thermostat rather than changing it?
Theoretically, you can try to clean the burnt contacts or bend the plate, but this is a temporary measure. The tightness of the bellows is most likely already broken, and the gas is gradually escaping. Repair does not guarantee long and stable operation, so replacing with a new element is the only correct solution.
Where to buy an original thermostat for Beko?
It is better to order original spare parts from authorized service centers or specialized stores of spare parts for household appliances, indicating the exact model of the refrigerator. Chinese-made analogues can be unstable and quickly fail.
What to do if the refrigerator does not turn on after replacement?
Check that the wires are connected correctly. If the diagram is correct, the new thermostat itself may be faulty (defective) or the problem lies in another component, for example, in the start relay or compressor windings, which you may have touched during operation.