When your Indesit refrigerator stops maintaining the set temperature or, conversely, begins to turn food into ice blocks, the first thought is often to call a specialist. However, in many cases, the problem lies in the failure thermostatwhich can be replaced independently if you act carefully. Thermoregulator is responsible for turning the compressor on and off, and its malfunction disrupts the entire cooling cycle.
Before you start disassembling, it is important to make sure that this particular unit is the problem. If the compressor does not turn on at all or runs without stopping, ignoring the position of the adjustment knob, there is a high probability of sensor failure. In this article we will look in detail at how to safely remove the old element and install a new one.
For work you will need a minimum set of tools: a flat-head and Phillips screwdriver, possibly pliers. Be sure to unplug the refrigerator before starting any worksince you will be working with live electrical contacts. Safety is the number one priority in any home appliance repair.
Diagnosing a thermostat malfunction
The first step should always be an accurate diagnosis. Do not rush to disassemble the unit until you are sure of the symptoms. If the Indesit refrigerator hums, but does not produce cold, or the freezer is clogged with frost, and the temperature in the refrigerator compartment is higher than normal, the suspect is on the thermostat. Another sign may be the absence of a characteristic click when turning the regulator knob.
There is a simple method of initial testing that does not require complete dismantling. If your refrigerator has a quick freeze button next to the thermostat knob, try pressing it. If after this the compressor starts, it means that the power circuit is intact, and the problem may be in the temperature switching mechanism itself. However, for an accurate result, it is better to use a multimeter.
⚠️ Attention: If you notice a burning smell or melted wire insulation near the thermostat, it is dangerous to carry out further diagnostics without the skills of an electrician. In such cases, it is better to call a specialist.
Checking with a multimeter is carried out in dial mode. Thermostat contacts should "ring" under certain conditions. If the device shows an open circuit where there should be a contact, or vice versa - a short circuit when there should not be one, temperature sensor requires replacement. This is a universal rule for most models of household appliances.
Preparing for dismantling and searching for a thermostat
The location of the thermostat in Indesit refrigerators depends on the specific model and year of manufacture. In classic two-chamber models, it is most often located inside the refrigerator compartment. You need to remove the plastic trim covering the light bulb and the control knob. In some modern models, access is provided through the top panel or rear wall.
The preparation process takes no more than 15 minutes if you act consistently. First, empty the refrigerator of food that may defrost, or prepare a thermal bag. Then move the unit away from the wall to provide easy access from all sides. Do not forget that you will have to work in good lighting.
- 🔌 Unplug the power cord from the outlet and provide access to the back wall.
- 💡 Remove the lampshade by carefully prying it off with a flat screwdriver or knife.
- 🔧 Unscrew the screws securing the plastic thermostat overlay (usually there are 2 or 3).
- 📸 Take a photo of connecting the wires before disconnecting them so as not to confuse the colors.
After removing the decorative handle and overlay, the thermostat itself will be revealed to your eyes. It is a plastic case with a long metal tube coming out of it - a capillary. It is this tube that transmits information about the temperature inside the chamber. Be extremely careful: the capillary is very thin and easily damaged.
The process of removing the old thermostat
The most critical stage is the physical removal of the device. In Indesit refrigerators, the capillary tube is often tucked into a special channel inside the chamber wall or pressed against a metal strip. Your task is to free the tube without damaging it or piercing the wall of the refrigerator with sharp tools.
First, disconnect the electrical terminals. They can be tight, so use the pliers with care to avoid breaking the plastic of the connectors. Having the wires color coded makes things easier. If there are no markings, refer to previously taken photographs. After disconnecting the wires, you can begin to remove the housing itself.
⚠️ Attention: The capillary tube is filled with refrigerant under pressure. If you accidentally take a bite or bend it too much, the gas will escape and the new thermostat will not respond correctly to the temperature.
Carefully pull the tube out of the channel. Sometimes it can stick to the wall or get stuck in the insulation. In such cases, brute force should not be used. It is better to slightly warm the exit point of the tube with a hairdryer (at minimum temperature) or use lubricant if the design allows it. The main thing is to maintain the integrity of the system.
☑️ Safe dismantling checklist
Table of compatibility and characteristics of thermostats
When choosing a replacement, it is important to consider not only the brand, but also the technical parameters. Thermostats for Indesit may differ in the length of the capillary tube, operating temperature range and type of mounting. Installing an unsuitable model will lead to incorrect operation of the compressor.
Below is a table with common characteristics that will help you navigate when purchasing. Pay attention to the markings on the device body. Often analogues from other manufacturers (for example, Klixon or Danfoss) are suitable as a direct replacement for the originals.
| Parameter | Description / Value | Importance |
|---|---|---|
| Capillary length | Usually 0.73 m, 0.9 m or 1.3 m | Critical (must be the same or be greater) |
| Temperature range | For example, -10...-23°C or -12...-25°C | High (affects operating modes) |
| Contact type | Normally closed / open | Critical (determines the logic of operation) |
| Diameter tubes | Standard (usually 2-3 mm) | Medium (important for passage into the canal) |
If you cannot find the exact original, look for universal analogues with similar characteristics. The main thing is that temperature threshold the switching on and off matches the requirements of your refrigerator model. Otherwise, the products may deteriorate or freeze.
Installing a new thermostat
Installation of a new element is carried out in the reverse order. First, carefully thread the capillary tube into the channel. Try not to bend it at an acute angle or twist it. The tube should lie freely, without tension, so that it does not deform during thermal expansion of the metal.
Fix the thermostat housing to the seat. Make sure that the sensing part (usually the end of a capillary or a special flask) is in close contact with the evaporator or chamber wall, as it was in the original design. Poor contact will lead to a delayed response to temperature changes.
What to do if the tube is too long?
If the length of the capillary of the new thermostat is longer than the old one, the excess can be carefully rolled into a ring with a diameter of at least 3-4 cm and secured in the free space behind the back wall or under the plastic. The main thing is not to pinch the tube.
Connect the electrical wires according to the diagram or photograph made earlier. Make sure the terminals click into place and are seated tightly. Weak contact will lead to sparking, heating and possible failure of a new thermostat or even melting of the wiring.
Checking performance and setting
After assembling the plastic covers and installing the handle, you can begin testing. Plug in the refrigerator. In the first minutes, the compressor may not start immediately - this is normal for some protective relays. Wait 5-10 minutes.
If the refrigerator starts, listen to its operation. The on and off cycles should be uniform. Check the temperature in the chambers after a few hours of operation. If the refrigerator compartment is too cold or, conversely, warm, you may need to fine-tune the position of the thermostat or check the length of the capillary.
Sometimes it is necessary to adjust the screw under the seal on the thermostat itself, but this should only be done with experience and measuring instruments. For domestic use, the factory setting is usually sufficient if the model is selected correctly.
⚠️ Attention: The characteristics of refrigeration equipment may vary slightly depending on the specific series and year of production. Always check the visual location of the components with your real model before starting work.
Frequently asked questions (FAQ)
Is it possible to repair an old thermostat, or just change it?
In 99% of cases, thermostats are non-separable and cannot be repaired. Inside there is a sealed bellows chamber with gas, the violation of which renders the device useless. It’s easier and more reliable to buy a new part.
Why does the new thermostat click, but the compressor does not start?
This may indicate a problem with the compressor start relay or the motor itself. The thermostat only sends a signal (closes the circuit), but does not directly start the engine. It is also worth checking the voltage in the network.
What is the service life of a new thermostat?
High-quality thermostat lasts from 5 to 10 years, depending on the frequency of switching cycles and operating conditions (humidity, voltage drops).
Do you need to defrost the refrigerator before replacing it?
Full defrosting is not necessary if you work quickly. However, if there is a lot of ice in the chamber, it is better to let it melt so that water does not get on the electrical contacts or inside the insulation channels.