Brand refrigeration equipment Indesit is deservedly popular due to its reliability, but over time, even the highest quality equipment breaks down. One of the most common symptoms of a malfunction is a violation of the temperature regime, when food either does not cool at all, or, on the contrary, turns into an ice block. In most cases, the culprit of this behavior is thermostat or the thermostat, which ceases to correctly read the temperature inside the chamber.
Owners are often faced with the question of where exactly this important unit is located, since its location may vary depending on the specific model and year of manufacture of the unit. Understanding how your cold control system works is the first step to a successful repair. We will analyze in detail the design of various modifications so that you can quickly find the sensor and carry out diagnostics. Indesit refrigerator, is the first step to a successful renovation. We will analyze in detail the design of various modifications so that you can quickly find the sensor and carry out diagnostics.
Do not panic if the equipment has stopped freezing properly, because in many cases the problem can be solved independently, without resorting to the expensive services of a service center. It is only important to observe safety precautions and strictly follow the algorithm of actions. In this article we will look at all the nuances of the location of the thermostat, methods for checking it with a multimeter and a step-by-step replacement process.
The principle of operation of the thermostat and its role in the system
The thermostat is mechanical or electronic sensorwhich controls the air temperature inside the refrigeration chamber. Its main task is to close and open the electrical circuit of the compressor depending on the readings received through the sensing element. When the temperature rises above the set threshold, the contacts close, starting the motor, and when the desired cold is reached, they open, stopping the operation of the unit.
In classic models Indesit mechanical thermostats with a capillary tube are most often used. This tube, filled with refrigerant, responds to changes in temperature by expanding or contracting the gas inside, which activates the membrane and switches contacts. Electronic analogs operate on the basis of thermistors, the resistance of which changes depending on the heating, but their design is less susceptible to mechanical wear, although it is sensitive to power surges.
⚠️ Attention: Before starting any work to find or replace the thermostat, be sure to disconnect the refrigerator from the power supply. Working with live electrical wiring is deadly.
Failure of this unit leads to the compressor either working non-stop, trying to create a non-existent cold, or not turning on at all, leaving the food warm. Understanding the operating principle capillary tube and contacts helps to quickly diagnose the problem. If you hear clicks, but the compressor is silent, or vice versa - it hums incessantly, this is a sure sign that the thermostat requires your attention.
The location of the thermostat in different Indesit models
The answer to the question of where the thermostat is located in the Indesit refrigerator directly depends depending on the design of your model. In most classic two-chamber refrigerators Indesit the thermostat is located inside the refrigerator compartment. Usually it is hidden under a plastic cover on the inner wall or built directly into the temperature control unit if the regulator is located outside.
In models with a system No Frost or full process automation, control can be carried out through an electronic module, and the temperature sensor itself is often hidden in the evaporator or behind the back wall of the chamber. However, if we are talking about a mechanical regulator with a handle, then its body is located inside, and the capillary tube goes deep into the structure. In some older modifications, the thermostat may be installed externally, on the top of the case, but this is less common.
To accurately determine the location, you need to know the specific series of your device. For example, in series models C 130 or C 138 the thermostat is often located behind a plastic cover on the ceiling of the refrigerator compartment or in the corner of the side wall. It can be accessed after removing the decorative elements, which requires care so as not to damage the fragile plastic.
Hidden installation locations
In some modifications, the thermostat can be hidden behind the lighting panel or built into the control unit, which is attached to the internal partition. Carefully inspect all the plastic elements inside the chamber.
How to get to the thermostat: step-by-step instructions
The process of dismantling elements to access the thermostat requires care and a minimum set of tools. You will need a Phillips screwdriver, a flathead screwdriver for prying the latches, and possibly some pliers. Before starting work, empty the refrigerator compartment of food and shelves so that nothing interferes with your view and access to the walls.
If the temperature regulator is located on the front panel, you must first remove the handle itself. It may be a tight fit, so gently pry it open with a flat-head screwdriver or pull if the design allows. Once the handle is removed, you will see the mounting screws or latches holding the thermostat housing in place. In models where the regulator is located inside, you need to find a plastic cover; it is often located next to the lampshade.
After unscrewing the visible screws, do not rush to pull the panel towards you. Plastic in old refrigerators Indesit becomes brittle and can crack from careless movement. Carefully walk around the perimeter of the pads, checking for hidden latches. The capillary tube coming from the thermostat is very thin and easily pinched, so carry out all manipulations without sudden jerks.
☑️ Tools for disassembly
Fault diagnosis: checking with a multimeter
Before buying a new one part, you need to make sure that the problem lies in the thermostat and not in the compressor or start relay. To do this, you will need multimeterconfigured for dialing or resistance measurement mode. First, visually inspect the contacts: there should be no oxides, burning or traces of melting on them.
Disconnect the wires from the thermostat terminals, having previously photographed their location so as not to confuse the polarity during assembly. Connect the multimeter probes between the contacts. At room temperature, the contacts of a mechanical thermostat are usually closed, and the device should beep or show zero on the resistance scale. If there is no contact, try turning the regulator knob to the extreme position.
For a more accurate check, you can use the “freezing” method. Place the sensitive part of the thermostat (capillary tube with cylinder) in the freezer for 15-20 minutes. After cooling, the contacts should open (if it is a normally closed type) or, conversely, close when heated, depending on the type of device. Lack of response to temperature changes indicates failure of the part.
⚠️ Attention: The capillary tube of the thermostat is filled with freon under pressure. Do not bend, pierce or heat it with an open fire, as this can lead to depressurization and the impossibility of further operation.
Table of malfunctions and symptoms
Symptoms of a thermostat failure may be similar to other malfunctions, so it is important to be able to distinguish between the signs. Below is a table that will help compare the behavior of your refrigerator Indesit with possible causes.
| Symptom | Probable cause | Action |
|---|---|---|
| The compressor does not turns on | Open circuit in the thermostat | Ring the contacts, replace the part |
| The refrigerator does not turn off | Sticking contacts or gas leak | Check the tightness capillary |
| Severe freezing of the rear wall | Incorrect sensor calibration | Adjust or replace the thermostat |
| Food spoils, there is no cold | Complete failure of the thermostat | Diagnostics with a multimeter |
Analysis of these signs allows you to save time and immediately start searching the required spare part. If the compressor hums but does not start, the problem may not be with the thermostat, but with the start relay. However, if the motor is completely silent, then thermostat is the first candidate for checking.
Replacing the thermostat with your own hands
If the diagnostics have confirmed a malfunction, proceed with the replacement. Buy a similar thermostat model, paying attention to the length of the capillary tube and the number of contacts. Install the new sensor in the same position where the old one was, carefully straightening the tube along the grooves so that it does not touch sharp edges.
Connect the wires according to the photograph or diagram taken earlier. Make sure the connections are secure and not loose. Reassemble the case in reverse order, tighten all screws and install decorative trims. After connecting the refrigerator to the network, let it work for several hours to ensure the correct on and off cycle.
Frequently asked questions (FAQ)
Is it possible to temporarily close the thermostat to make the refrigerator work?
Technically, you can connect the wires directly, bypassing the thermostat, and the compressor will work. However, in this mode, the refrigerator will freeze continuously until you turn it off manually. This will lead to severe freezing of the food and possible breakdown of the compressor due to overheating. Use this method only for short-term diagnostics.
Why does the new thermostat click, but the refrigerator does not turn on?
The clicks indicate that the thermostat mechanics are working, but the signal does not reach the compressor. Check the motor start relay and the integrity of the compressor windings. It is also possible that you connected the wires to the contacts of the new regulator incorrectly.
How often do you need to change the thermostat in the Indesit refrigerator?
The service life of the thermostat is usually 5-10 years, depending on the intensity of use. Scheduled replacement is not required; it is changed only when signs of malfunction appear. Sudden changes in voltage in the network can shorten the service life of the part.
Where to buy an original thermostat for Indesit?
It is better to look for original spare parts in specialized household appliance stores or official service centers. When purchasing, pay attention to the labeling, since visually similar models may have different temperature characteristics.