If your refrigerator Indesit stops turning off, works without interruption, or, conversely, has stopped cooling food, the first reason is often a failure of the thermostat. This small device is responsible for monitoring the temperature inside the chambers and sends a signal to the compressor to turn on or off. Thermostat malfunction is one of the most common breakdowns, which can be easily fixed on your own without resorting to an expensive call to a technician. In this article, we will analyze in detail the diagnostic and replacement process.
Before proceeding with disassembly, it is important to understand the operating principle of the device. Thermostat It is a sensor with a capillary tube that responds to temperature changes. When the specified parameters are reached, the contacts open or close, starting the cooling cycle. Ignoring the problem can lead to more serious consequences, such as food failure compressor or defrosting. Therefore, a prompt response to signs of malfunction is critical for the safety of equipment.
Independent replacement requires a minimum set of tools and basic knowledge about the design of household appliances. However, it is worth remembering that any manipulation with electrical appliances requires compliance with safety precautions. The main rule is to completely disconnect the refrigerator from the power supply before starting work. Below we will consider all the stages, from searching for a part to the final check of the unit’s functionality.
Fault diagnosis thermostat
The first step should always be an accurate diagnosis. Symptoms indicating a thermostat failure may be similar to compressor problems or a freon leak. If the refrigerator hums constantly and does not turn off, creating an ice crust in the freezer, this is a sure sign that it is stuck in a closed state. In this case, the unit does not “understand” that the desired temperature has already been reached. Indesit buzzes constantly and does not turn off, creating an ice crust in the freezer, this is a sure sign that thermostat contacts stuck in a closed state. In this case, the unit does not “understand” that the desired temperature has already been reached.
The opposite situation is also possible: the refrigerator is silent, the light inside is on, but there is no cold. If, when you turn the control knob to the “Maximum” position or when you tap on the thermostat body, you do not hear a characteristic click, it means that the mechanism has failed. Capillary tube it could lose its tightness, and the filler gas has evaporated, which is why the bellows has stopped responding to heat.
⚠️ Attention: Before diagnosing, make sure that the problem is not incorrect temperature setting or overloading of the chambers with products. Sometimes it is enough to simply defrost the unit for 10-12 hours to eliminate a false alarm.
For a final check, you can use a multimeter in dial mode. With the thermostat removed, the contacts should “ring” at room temperature (for most models). If the device shows a break, the part requires replacement. It is also worth inspecting capillary tube for mechanical damage or traces of oxidation.
Necessary tools and preparation
To successfully replace the thermostat in the refrigerator Indesit you will need a minimum set of tools that are usually found in every home. The main thing is to prepare a workplace with good lighting, since some fastening elements may be hidden in hard-to-reach places.
- 🔧 Screwdrivers: Phillips and flat-head (different sizes for different screws).
- 🔌 Pliers or pliers (for carefully removing the tube).
- 🧤 Gloves (to protect your hands from sharp edges and contamination).
- 📷 Smartphone (to take a photo of the wiring diagram before disconnecting).
It is important to choose the correct model of spare part. Thermostats for Indesit may differ in length capillary tube, type of fastening and location of contacts. An article number is usually stamped on the body of an old part (for example, K59 or TAM series). Buying an analogue with an unsuitable tube may lead to the fact that it simply does not reach the evaporator or will be too long, which complicates installation.
It is also recommended to prepare in advance a container for collecting condensate, which can accumulate in the thermostat niche if the unit has recently been defrosted. A clean workplace is the key to ensuring that small screws do not get lost and that debris does not get inside the mechanism.
☑️ Preparing for repairs
Removing the old thermostat
The dismantling process depends on the specific refrigerator model Indesit, but the general algorithm of actions is similar for most devices with an upper freezer. First you need to free access to the thermostat. In classic models, it is often hidden behind a plastic panel inside the refrigerator compartment or located outside above the door.
If the thermostat is located inside, carefully remove the protective casing by unscrewing the fixing screws. Be careful with plastic latches - they can be brittle, especially if the plastic is "tired" from temperature changes. After removing the cover, you will see the control unit itself with its capillary tube and suitable wires coming out of it.
The next step is to disconnect the electrical wires. As mentioned earlier, a photo will help you avoid confusion when connecting a new element. Usually wires are connected through a terminal block or simply inserted into connectors. Gently pull the connector without tugging on the wires themselves to avoid damaging the insulation. Then you need to remove the capillary tube from the technological hole in the camera body.
⚠️ Attention: The capillary tube is very thin and sensitive to creases. Do not bend it at an acute angle and do not use excessive force when removing it, otherwise the new thermostat will immediately fail.
In some models Indesit the tube can be secured with an additional clamp or glued to the evaporator. In such cases, it may be necessary to carefully bend the evaporator blades or remove the back wall inside the chamber. Proceed slowly, assessing each movement.
What to do if the tube is stuck?
If the capillary tube cannot be removed, do not pull it by force. Try slightly warming the place where the tube exits the body with a hairdryer at a minimum temperature or use lubricant (silicone) to make sliding easier. Sometimes gently rotating the tube around its axis helps.
Installing a new thermostat
Installation of the new part is carried out in the reverse order of dismantling. First of all, carefully insert capillary tube the new thermostat into the technological hole. The immersion depth should correspond to the old model - usually it is 30-40 cm, but it is better to focus on the length of the removed tube. If the new tube is longer, its excess can be carefully twisted into a ring and placed in free space, avoiding kinks.
Secure the thermostat housing to the seat. Make sure it fits tightly and does not loosen, as vibrations during compressor operation can damage the contacts. Next, connect the electrical wires strictly according to the photograph or diagram taken earlier. Models Indesit are characterized by color markings, but you should not rely on color alone - the order of connection to the terminals is more important.
After connecting the wires, assemble the structure in the reverse order: install the protective panel, tighten the screws. Make sure that the temperature control knob rotates freely and does not touch adjacent elements. If your model has a compressor operation indicator light, check whether it lights up when you turn it on.
Checking the system functionality
After assembly, the refrigerator Indesit is ready for testing. Turn on the unit and set the thermostat knob to the middle position (usually number 3 or 4). Within the first 10-15 minutes you should hear the compressor start. If the engine starts, this is a good sign - the electrical circuit is assembled correctly.
Let the refrigerator run idle (without food) for about 2-3 hours. During this time, it should gain temperature and turn off. The moment of shutdown can be determined by a characteristic click and a stop in the hum of the motor. If the “on-off” cycle was successful, it means thermostat it correctly responds to changes in temperature inside the chamber.
| Symptom | Possible cause | Action |
|---|---|---|
| The compressor does not start | Error in connecting the wires | Check the connection diagram |
| The refrigerator does not turn off | Incorrect depth of tube immersion | Check the position of the capillary |
| Poor cooling | The tube does not touch the evaporator | Correct the position of the tube |
| Frequent on/off | Incorrect calibration or defective | Check settings or replace |
It is also important to listen to the operation of the unit. The appearance of new noises, whistles or vibrations may indicate that capillary tube it is touching the case walls or other parts. In this case, repeated disassembly and correction of the position of the elements will be required.
Frequent errors during replacement
Even experienced craftsmen sometimes make mistakes, not to mention beginners. One of the most common problems is using a thermostat that is not designed for a specific model Indesit. The difference in the temperature response range can lead to the refrigerator either undercooling or overfreezing food.
Another common mistake is careless handling capillary tube. Kinks, squeezing or damage to the tube insulation lead to immediate failure of the new thermostat. Remember that there is gas under pressure inside the tube, and breaking the seal is fatal.
⚠️ Attention: Never check the operation of the thermostat by connecting it directly to the network without load or in a disassembled state. This can lead to a short circuit or electric shock.
Also, users often forget to check the tightness of the door seals after repair. If the door does not close tightly, the thermostat will constantly receive a signal that the temperature is rising and keep the compressor running, which will create a false impression that the newly installed part is faulty.
Is it possible to use a thermostat from another refrigerator?
The use of analogues is possible, but only if the basic parameters match: the length of the capillary tube, the range of operating temperatures and the type of contacts. There are no universal solutions, and installing the wrong part can lead to incorrect operation.
How long does a new thermostat last?
The average service life of a high-quality thermostat is 5-7 years. However, with frequent voltage drops in the network or extreme operating conditions, this period may be shortened.
Do you need to call a technician after replacement?
If you have successfully replaced the part, the refrigerator has started and returned to normal mode, calling a technician is not required. However, if you doubt your actions or the result has not been achieved, it is better to contact professionals for diagnostics.
Why does the Indesit refrigerator not turn off for a long time after replacement?
This may be due to the fact that the chamber has not yet cooled down to the desired temperature (especially if warm products are loaded), or the thermostat is not installed correctly (the tube does not reach the cooling zone).