Refrigerators Nord have proven themselves to be reliable equipment that can operate for many years, but even time-tested units have failures in the thermoregulation system. If you notice that the chamber has stopped freezing or, conversely, the food turns into ice, and the motor-compressor works without interruption, most likely the problem lies in the thermostat. Thermoregulator is a key element of automation that sends a signal to the compressor to turn on or off depending on the temperature inside the chamber.
Before calling a technician, you should consider the possibility of doing it yourself, since the procedure for replacing this unit is technically accessible even to a beginner. However, in order to remove the thermostat of the Nord refrigerator correctly and not damage the fragile elements of the cooling system, you must clearly understand the sequence of actions and follow safety precautions. In this article we will analyze in detail the dismantling process, typical malfunctions and nuances of setting up a new regulator.
It is important to understand that incorrect installation or damage to the capillary tube can lead to a refrigerant leak, which will require expensive professional repairs with refilling with freon. Therefore, each step must be performed carefully, without jerking or using excessive force. If you are ready to work, stock up on the necessary tools and carefully study the manual below.
Fault diagnosis and signs of breakdown
Before you start disassembling, you need to make sure that the problem is really in the thermostat, and not in a freon leak or a compressor malfunction. The main sign of failure thermostat is incorrect operation of the motor: it either does not start at all, or it works cyclically, but with a violation of the temperature regime. In some cases, the refrigerator may turn on for only a few seconds and immediately turn off, which indicates a short circuit in the contacts or their sticking.
For an initial check, you can perform the so-called “freezing”. Unplug the refrigerator, defrost it completely and leave it with the doors open for a couple of hours. After this, turn on the unit and listen: if the compressor starts up, but after 30-40 minutes of operation does not turn off, and the temperature in the chamber continues to drop to extreme values, this is a sure sign that the sensor does not “see” the cold and does not open the circuit.
It is also worth paying attention to the condition of the capillary tube that fits the evaporator. If traces of corrosion, creases or mechanical damage are visible on it, there is a high probability that the tightness of the bellows inside has been broken. In this case, replacing the thermostat is mandatory, since this unit cannot be repaired. Sometimes the cause of problems is oxidized contacts, which you can try to restore, but most often a complete replacement of the assembly is required.
Necessary tools and workplace preparation
To successfully dismantle the thermostat, you will need a minimum set of tools that can be found in the arsenal of any home craftsman. The main thing is to ensure good lighting of the work area, since many elements are hidden in hard-to-reach places in the refrigerator compartment. Before starting work, be sure to disconnect the refrigerator from the electrical outlet by removing the plug from the socket to eliminate the risk of electric shock.
You will need the following tools:
- 🔧 Phillips and flathead screwdriver (for removing screws and plastic latches)
- 🔦 Flashlight or headlamp (to illuminate the interior)
- 🧤 Gloves (to protect hands from sharp edges and dirt)
- 🧊 Water container and rag (in case condensation drips during defrosting)
- 📏 Pliers (tighten carefully contacts, if necessary)
Pay special attention to surface preparation. Cover the floor in front of the refrigerator with a soft cloth or cardboard to avoid scratching the surface when placing the removed parts. If the refrigerator model is Nord two-chamber, make sure that you are working with the chamber where the evaporator is located (usually this is the refrigeration compartment in models with one compressor).
☑️ Preparation for repair
Remember to prepare a place for storing screws and small parts. It's best to use a magnetic tray or small labeled containers to avoid confusion during assembly. Nord refrigerators often use screws of different sizes to secure shelves, panels and the thermostat itself, and it is very easy to confuse them.
Access to the thermostat: disassembling the refrigerator compartment
The process of gaining access to the thermostat in refrigerators Nord may vary slightly depending on the model, but the general principle remains united. The thermostat is usually located inside the refrigerator compartment, often hidden behind a plastic panel or built into the lighting control unit. In some older models, the regulator may be located outside, on the back wall of the case, but in most modern Nords it is hidden inside.
First, empty the refrigerator compartment of food and remove all shelves and drawers that may interfere with access to the rear or side wall. If the thermostat is covered with a decorative trim, carefully pry it off with a flat-head screwdriver or plastic spatula. Proceed with caution, as plastic becomes brittle in the cold and can crack if handled carelessly.
If you find that access is difficult due to ice, do not try to pick out the ice with a knife or other sharp objects - there is a high risk of damaging the capillary tube. Wait until the ice completely melts or speed up the process by placing a container of warm water (not hot!) in the chamber. Only after complete removal of moisture and ice can you continue disassembly. evaporator or capillary tube. Wait until the ice completely melts or speed up the process by placing a container of warm water (not hot!) in the chamber. Only after complete removal of moisture and ice can disassembly continue.
⚠️ Attention: When removing plastic panels, do not use excessive force. If the panel cannot be removed, check that all screws are removed. Often the fasteners are hidden under decorative plugs or labels.
After removing the protective panel, you will see the thermostat itself - this is a device with a temperature control knob and a long thin tube (capillary) coming out of it. It is in this state that you need to assess the situation and plan further actions to disconnect the contacts and remove the sensor.
Removing the thermostat: step-by-step instructions
The most critical stage is physically disconnecting the thermostat from the electrical circuit and removing the sensitive element from the evaporator. Before touching the wires, take a photo of the connection diagram or sketch it so that when installing a new device you do not mix up the contacts. An error in the connection may result in a short circuit or improper operation of the refrigerator.
Remove the temperature control knob by simply pulling it towards you. Then unscrew the screws securing the thermostat housing to the chamber wall or bracket. After this, carefully disconnect the electrical wires. In refrigerators Nord the wires are often connected through a block or clamps that need to be loosened with pliers or a screwdriver.
Nuances of working with a capillary tube
The capillary tube is very thin and is easily pinched. When removing the old sensor, do not pull the tube with force - it may burst and the refrigerant will escape. If the tube is inserted into the hole in the evaporator, it must be removed very smoothly, without jerking.
Now you need to remove the capillary tube from the technological hole in the evaporator. It can be simply inserted into the socket or secured with a bracket. Gently pull on the thermostat housing to help release the tube. If the tube is attached to the evaporator with a bracket, it must first be removed. Be careful not to damage the aluminum fins of the evaporator, as they wrinkle easily.
Below is a table describing typical actions for different types of fastening:
| Mounting type | Action | Tool |
|---|---|---|
| Inserted into the socket | Gently pull out | Hands |
| Clamped with a bracket | Press the bracket and remove | Flat screwdriver |
| Glued | Carefully separate | Plastic spatula |
| Covered with a panel | Remove the panel | Phillips screwdriver |
After removing the capillary tube and disconnecting the wires, the old thermostat can be considered removed. Carefully inspect the installation site for dirt or signs of corrosion and, if necessary, clean the surface before installing a new element.
Installing a new thermostat and setting
Installing a new one thermostat is performed in the reverse order. First, carefully insert the capillary tube of the new sensor into the opening of the evaporator to the same depth to which the tube of the old device was immersed. The depth of immersion is critical: if the tube is inserted too deeply, it may rest against the wall and burst, and if it is too shallow, the refrigerator will not work correctly.
Fix the thermostat housing in its original place and connect the electrical wires strictly according to the previously made diagram or photograph. Make sure the contacts are tight and not loose. Put the temperature control knob on and set it to the middle position (usually number 3 or 4 on the scale).
⚠️ Attention: Do not turn on the refrigerator immediately after assembly. Let the system stand for 10-15 minutes so that the refrigerant calms down (if there was a risk of it) and the contacts fall into place. It is better to check the first start.
After turning on the refrigerator, listen to the operation of the compressor. It should start and run until the set temperature is reached, and then turn off. If the refrigerator is operating normally, you can begin installing shelves and loading food. Complete stabilization of the temperature regime can take up to 24 hours.
Frequent errors during replacement and precautions
When replacing yourself When installing a thermostat, novice technicians often make mistakes that can ruin all their efforts. One of the most common is damage to the capillary tube during installation. Remember that inside the tube there is freon gas under pressure, and any leakage will make the thermostat inoperative.
Another common mistake is incorrect connection of the wires. If you mix up the ground and phase wires or connect the pins incorrectly, you could burn out your new thermostat or create an electrical hazard. Always double-check the connection diagram before applying voltage.
Also, do not ignore the condition of the door seal. If you are replacing the thermostat because the refrigerator is not keeping cold, make sure the door closes tightly. Sometimes the problem is not in the sensor, but in the fact that warm air constantly enters the chamber through a leaky sealseal, and no thermostat can compensate for this heat loss.
⚠️ Attention: Technical characteristics of refrigerators may vary depending on the year of manufacture and the specific modification. Before starting work, check the technical documentation of your model Nordif it is preserved, or find a diagram on the Internet using the exact model number.
If, after replacing the thermostat, the refrigerator starts working, but the on/off cycle is too short or too long, you may need to (adjust) the screw on the thermostat itself (if there is one) or replace the part with an analogue with others parameters. However, in 95% of cases, installing a working original thermostat solves the problem.
Is it possible to install a thermostat from another brand?
Theoretically, it is possible if the dimensions, length of the capillary tube and temperature response range match. However, it is better to use original spare parts Nord or their direct analogues (for example, TAM or K-59), since they are guaranteed to meet the specifications.
What to do if the capillary tube breaks during removal?
If the tube bursts, the thermostat can no longer be restored, it must be thrown away. The main thing is to make sure that you do not damage the refrigerator evaporator. If only the sensor is damaged, simply replace it with a new one.
Why does the refrigerator not turn off after replacing the thermostat?
Possible reasons: the thermostat is incorrectly selected (wrong temperature range), the capillary tube is not inserted completely, the new device itself is faulty, or the problem is not in the thermostat at all (for example, freon leakage or sticking valve).
Is it necessary to defrost the refrigerator before replacing?
Yes, definitely. The presence of ice and moisture can lead to a short circuit when working with electrical contacts, and will also make access to components difficult and can lead to damage to plastic elements during careless disassembly.
Where can I find the thermostat markings?
The markings are usually applied to the metal body of the thermostat. To see it, you often have to remove the protective plastic casing or completely remove the assembly from the chamber, since the inscription may be hidden when assembled.