Failure of the temperature control system - one of the most common reasons why a refrigerator Stinol stops functioning normally. If you notice that the compressor works without stopping or, on the contrary, is silent for days, and the food inside begins to deteriorate or become covered with an ice crust, the problem most often lies in thermostat. This small device is responsible for closing and opening the compressor power circuit depending on the temperature in the chamber.
Independent replacing the thermostat is a completely solvable task for a person who has minimal skills in working with power tools and a basic understanding of electrical circuits. However, before proceeding with disassembly, you need to make sure that the diagnosis is correct, since similar symptoms can be observed with a freon leak or a faulty start relay. In this article, we will analyze in detail the process of diagnosing, selecting and installing a new component so that you can bring your refrigerator back to life.
Diagnosing a thermostat malfunction
The first step before starting any work should be a thorough check. Do not rush to disassemble the refrigerator unless you are convinced that this is the problem. Symptoms can be deceiving: for example, if the compressor does not start at all, this may be due to a breakdown of the motor itself or a lack of voltage in the network. If it hums, but does not start, or works continuously without turning off for hours, the probability of failure of the temperature sensor is extremely high. thermostat. Symptoms can be deceiving: for example, if the compressor does not start at all, this may be due to a breakdown of the motor itself or a lack of voltage in the network. If it hums but does not start, or works continuously without turning off for hours, the likelihood of the temperature sensor failing is extremely high.
For accurate diagnosis you will need multimeter. You need to get to the thermostat, which for models Stinol-101, Stinol-102 and Stinol-103 is usually located inside the refrigerator compartment in a plastic box under the temperature control knob or next to the lampshade. After removing the protective cover and disconnecting the refrigerator from the network, you need to disconnect the wires from the thermostat contacts.
⚠️ Attention: Before taking any measurements, be sure to disconnect the refrigerator from the power supply! Working with live electrical components is life-threatening.
Next, you should check the contacts with a multimeter in continuity mode. At room temperature, the contacts should be closed (the device beeps). If you place the thermostat sensing capillary tube in the cold (for example, in the freezer for 10-15 minutes), the contacts should open. If this does not happen, or if the circuit does not ring at all - The thermostat is faulty and requires replacement.
Preparation for replacement and selection of spare parts
Once the fault is confirmed, it is necessary to select the correct replacement. Thermostats for refrigerators Stinol are often interchangeable with analogues from other manufacturers, such as Tam, K59 or Ortro. However, it is important to pay attention to the length capillary tube and location of the contacts. An incorrectly selected tube length can lead to incorrect operation: too short will not sense the real temperature deep in the chamber, and too long can get tangled or damaged during installation.
The standard tube length for most Stinol models is from 0.6 to 1.3 meters, but it is better to measure the length of the old part or check with technical documentation. The number of contacts is also critically important: there can be two or three. The third contact is usually responsible for indicating the operation of the compressor or for turning on the fan in systems No Frost, although in classic Stinola two-pin models are more common.
For work you will need the following set of tools:
- 🔧 Screwdrivers (phillips and flat) for disassembling the case.
- 🔪 A sharp knife or side cutters for trimming excess length of the tube (if necessary).
- 🧤 Gloves to protect hands from sharp metal edges.
- 📏 Ruler or tape measure for measuring the capillary tube.
Is it possible to use a universal thermostat?
Yes, universal thermostats (for example, TAM-133 or K-59) are often suitable for replacing the original ones. The main thing is to set the stem length correctly and make sure that the temperature range meets the requirements of your refrigerator model. However, original spare parts are always preferable, since they are guaranteed to fit the mounting geometry.
Removing the old thermostat
The process of removing the old temperature controller requires care, since the capillary tube is made of thin metal and easily bends or bursts. In refrigerators Stinol access to the thermostat is usually through the top of the refrigerator compartment. First you need to remove the plastic cover covering the adjustment mechanism. It can be held on by latches or screws that need to be unscrewed.
After removing the decorative panel, you will see the thermostat itself, fixed in a metal or plastic bracket. Carefully disconnect the wires, first remembering or photographing their connection diagram. This is a critical point as an assembly error may result in a short circuit. Then carefully remove the thermostat from its seat, trying not to sharply pull the capillary tube that goes deep into the housing.
The tube usually passes through the wall of the refrigerator and is fixed in the evaporator or on the back wall of the chamber. It must be very carefully pulled out of the canal. If the tube is stuck or stuck, do not use excessive force - it is better to slightly warm the outlet with a hair dryer or use lubricant so as not to damage the internal elements of the refrigerator.
☑️ Removal steps
Installing and connecting a new thermostat
Installation of a new component begins with the preparation of the capillary tubes. If the length of the new tube exceeds the required length, it can be carefully twisted into a ring with a diameter of at least 5 cm. Break or bend The tube at an acute angle is strictly prohibited - this will disrupt the circulation of the refrigerant inside it, and the thermostat will stop responding to temperature changes. Insert the tube into the channel until it stops, in the same way as the old part was installed.
Fix the thermostat housing in the seat. Next comes the most critical stage - connecting the electrical wires. The color marking of the wires may vary depending on the year of manufacture and modification of the refrigerator, so you cannot rely on color alone. Use the diagram that you photographed during disassembly, or be guided by the contact markings on the thermostat body itself.
Usually the connection looks like this:
- 🟡 The yellow wire with a green stripe is grounding, it connects to the refrigerator body (not to the contacts thermostat).
- 🔴 Red, orange or black - the phase coming from the power cord.
- 🔵 Blue or brown - the wire going to the compressor.
After connecting the wires, make sure that The contacts sit tightly in the sockets and do not dangle. If the connectors are oxidized, it is better to clean them or replace them. Reassemble the housing in the reverse order, install the temperature adjustment knob.
Table of faults and solutions
Even after successful replacement, they may nuances may arise in the operation of the equipment. Below is a table that will help compare symptoms with possible causes and methods of eliminating them. This will help you understand whether it was done correctly setting the thermostat or the problem lies deeper.
| Symptom | Possible cause | Solution |
|---|---|---|
| The refrigerator does not turn on | Incorrect wire connection | Check the connection diagram, ring the circuit |
| The compressor runs without stopping | Insufficient capillary tube length | Replace the thermostat with a model with a longer tube |
| Poor cooling | Incorrect adjustment screw | Calibrate the temperature conditions |
| Sparking contacts | Poor contact in the terminals | Clean the contacts, tighten the terminals |
| Frequent on/off | Faulty door seal | Check the chamber for tightness, replace the rubber |
⚠️ Attention: Technical characteristics and connection diagrams may vary slightly depending on the specific modification of the Stinol refrigerator. Always check the technical documentation included with your model, or look for the diagram on the sticker inside the case.
Setting and calibrating the temperature
After installing a new thermostat, the refrigerator may not work perfectly right away. Often required calibration. Most thermostats have a small adjustment screw hidden inside a plastic stem where a knob is inserted. Turning this screw allows you to shift the range of operation of the contacts.
If the refrigerator turns off too early, without having time to reach the desired temperature, the screw needs to be tightened slightly in one direction. If he freezes the food to the point of ice, go to another. Do this carefully, literally a quarter turn, and wait a few hours for the temperature to stabilize before the next adjustment.
Checking the functionality is carried out using an external thermometer placed in a glass of water in the center of the refrigerator compartment. The normal operating temperature for the refrigerator compartment is considered to be from +2 to +6 degrees Celsius. The compressor should turn off when it reaches the lower limit and turn on when the temperature rises to the upper limit.
Frequently asked questions (FAQ)
Is it possible to replace the Stinol thermostat with an analogue from another brand?
Yes, this is possible. Thermostats have standardized parameters. The main thing is that the length of the capillary tube, type of fastening and operating temperature range match. Popular analogues are the K59, TAM, DANFOSS series.
Why does the new thermostat click, but the refrigerator does not start?
This may indicate a malfunction of the compressor start relay or the motor itself. A click means that the thermostat is sending a signal properly, but the actuator does not operate. Also check for voltage in the outlet.
Do you need to defrost the refrigerator before replacing the thermostat?
Full defrosting is not necessary if access to the thermostat is in the upper part of the chamber and does not require disconnecting the freon tubes. However, if you plan to work for a long time or are afraid of damaging the ice crust, it is better to turn off the device in advance.
How to determine that the capillary tube is damaged?
If the tube is damaged, the filler gas (freon inside the thermostat) evaporates. The thermostat stops responding to the cold and either keeps the circuit constantly closed (the compressor does not turn off) or open (the refrigerator does not work). Visually, you can notice flattening or cracks in the tube.