Replacing the thermostat in an Indesit refrigerator: a master's guide

A sudden stop in the operation of refrigeration equipment often takes you by surprise, especially when there are perishable products in the chambers. If you notice that Indesit refrigerator stops turning off, runs continuously, or, conversely, does not start the compressor at all, the likely cause may be a failure of the thermostat. This small but critically important element is responsible for maintaining the set temperature inside the chambers.

Replacing the thermostat yourself is a real task for a person who has basic skills in working with tools and basic electrical knowledge. Unlike complex electronics, mechanical thermostats have a simple design and operating principle. However, in order to carry out repairs efficiently and safely, it is necessary to strictly follow the sequence of actions and safety precautions when working with electrical appliances.

In this article we will analyze in detail the process of diagnosing and replacing the temperature sensor. You will learn how to determine what exactly is to blame thermostat, what tools are needed for the job and how to correctly install a new part so that the refrigerator works like new again. The right approach will save a significant amount on calling a technician and extend the life of your household appliances.

Principle of operation and signs of malfunction of the thermostat

Thermostat, or thermostat, is an electromechanical device that closes or opens an electrical circuit depending on the temperature in camera. The capillary tube of the sensor reacts to changes in thermal conditions by transmitting a signal to the contact group. When the temperature reaches the set value, the circuit opens and the compressor stops. If this mechanism is broken, Indesit refrigerator begins to work incorrectly.

There are several obvious symptoms indicating a breakdown of this unit. Often users are faced with a situation where the unit hums constantly without going into rest mode. In another case, the motor-compressor may not start at all, even if the chamber is warm. Sometimes there is too frequent switching on and off of equipment, which leads to rapid wear of the engine.

⚠️ Attention: Before starting any diagnostic work or replacing parts, be sure to disconnect the refrigerator from the electrical network. Working with live electrical wiring is fatal.

For a more accurate understanding of the symptoms, it is worth considering them in the form of a list. This will help you initially assess the situation before disassembly begins:

• 🔌 The compressor works non-stop, a “fur coat” or ice forms in the chamber, and the food freezes.
• 🌡️ The refrigerator is silent, it’s warm inside, but when you turn the knob or close the contacts, you hear a click and the motor starts.
• ❄️ Insufficient cooling is observed, although the compressor is operating normally, but the operating cycles are too short.

It is important to understand that similar symptoms can also appear if there is a freon leak or a faulty start relay. Therefore, a visual inspection and simple diagnostics before purchasing a new part are mandatory. If you doubt your abilities, it is better to consult with a specialist, but in most cases the problem lies precisely in thermostat.

Necessary tools and preparation for repair

The success of any repair operation directly depends on the quality of preparation and the availability of the right tools. To replace the thermostat in the refrigerator Indesit you do not need complex specialized equipment. A standard home craftsman's kit is enough, which many people have in their garage or toolbox.

First of all, it is necessary to ensure good lighting of the work area, since many controls are hidden inside the case or behind panels. You will also need free space around the refrigerator for easy access to the back wall and internal chambers. Do not forget to prepare a container for storing removed screws and small parts so as not to lose them during work.

The basic set of tools includes:

• 🔧 A set of screwdrivers (phillips and flathead of various sizes) for dismantling panels and terminals.
• ✂️ Pliers or pliers for working with wires and clamps.
• 🔍 Multimeter (tester) for checking circuit integrity and diagnosing contacts.
• 🧤 Work gloves to protect hands from sharp metal edges and contamination.

Special attention should be paid to the multimeter. This device will allow you to accurately verify the malfunction of the old part before replacing it. If you don't have a tester, diagnosis can be done by elimination, but this is less reliable. Having a tool significantly increases the likelihood of successfully completing the repair the first time.

Removing the old thermostat in the Indesit refrigerator

The dismantling process may vary slightly depending on the specific model of your Indesit refrigerator. In most modern models, the thermostat is located inside the refrigerator compartment, often hidden behind a plastic cover or located in the lampshade. In older models, it can be mounted externally, on the rear wall of the unit.

Start by emptying the refrigerator compartment of food and removing the shelves to provide maximum access to the rear wall. If the thermostat is inside, carefully remove the decorative temperature control knob. It is usually simply removed by hand or pryed off with a flat screwdriver if it has a lock. Then unscrew the fastening screws holding the plastic panel.

After removing the panel, you will see the thermostat itself with the wires suitable for it and a capillary tube going deep into the wall. Proceed with caution:

1. Take a photo of the wire connection diagram so as not to confuse them when installing a new part.
2. Disconnect the terminals from the wires, slightly rocking them from side to side.
3. Carefully pull the thermostat housing and capillary tube out of the hole in wall.

⚠️ Attention: The capillary tube of the thermostat is very thin and fragile. When removing the old sensor and installing a new one, avoid sharp bends, creases or impacts on the tube, as this will lead to gas leakage and immediate failure of the new part.

If you find that the tube is attached to the evaporator using a special clamp or glued, try not to damage the heat exchanger. In some cases, access may require partial disassembly of the camera's internal plastic. The main thing is to remember or record in the photo the original position of all elements.

Diagnostics and checking the performance of the part

Before you go shopping for a new spare part, it makes sense to finally make sure that the old one is faulty. It often happens that the problem lies not in the thermostat itself, but in oxidized contacts or a broken wire. Testing with a multimeter is the most reliable method of diagnosis.

To carry out the test, switch the multimeter to continuity or resistance measurement mode. At room temperature, most thermostat contacts should be closed. If the device shows one or infinity, then the circuit is broken. You can also lower the sensitive element (capillary tube) into a container of cold water (about +5°C) - at this moment a characteristic click should be heard and the circuit will open.

Below is a table that helps interpret the tester readings when checking:

If diagnostics have confirmed that thermostat does not work, it must be replaced with a similar one. When purchasing, pay attention not only to the appearance, but also to the markings, the length of the capillary tube and the temperature range. An incorrectly selected part can lead to incorrect operation of the compressor.

Installing a new thermostat and assembling the system

Installing a new thermostat is carried out in the reverse order of dismantling. Carefully check the photographs taken at the initial stage. It is important not only to connect the wires, but also to position the capillary tube correctly, since the accuracy of temperature reading depends on this.

Carefully insert the tube into the hole in the chamber wall, trying not to damage it on the edges of the hole. Move it to the same depth as the old one. If there was a special tip or sleeve at the end of the tube, make sure that it fits tightly to the evaporator or is installed in the standard mounting location. Securely fasten the thermostat body to the seat.

Next follows the electrical connection stage:

• 🔌 Connect the wires to the contact groups according to the previously made diagram or color marking.
• 🔒 Make sure that the terminals sit tightly and do not jump off vibrations when the compressor is operating.
• 🧊 Check that the wires are not twisted or touching moving parts or sharp edges.

After connecting the electrics, reinstall the plastic panel and decorative handle. Make sure all screws are tight and there are no gaps in the plastic. Now you can proceed to a test run of the equipment.

Test run and temperature adjustment

After assembly is complete, plug in the refrigerator. In the first minutes of operation, listen carefully to the sounds: the compressor should start. If the motor hums but does not start, there may be a problem with the start relay, but more often than not, if the thermostat is set correctly, the appliance will start working immediately.

Let the refrigerator run idle (without food) for several hours. This will allow the system to return to operating mode and the temperature will stabilize. Periodically check the operation of the unit: it should turn off automatically when the set parameters are reached and turn on when the temperature rises.

The adjustment is made by rotating the regulator knob. Typically, the middle position corresponds to the optimal storage mode. It is not recommended to immediately set the maximum cold, as this may lead to excessive load on the compressor in the first hours of operation.

⚠️ Attention: If, after replacing the thermostat, the refrigerator does not work correctly (for example, it does not turn off for more than 2 hours or does not get cold), immediately disconnect it from the network. Re-checking the connection diagram and the integrity of the capillary tube is mandatory.

Frequently asked questions (FAQ)

Where exactly is the thermostat in the Indesit refrigerator?

In most Indesit models The thermostat is located inside the refrigerator compartment, in the upper right corner, hidden under a plastic cover or combined with the lampshade. In some older models, it may be located outside on the back wall.

Is it possible to replace the thermostat with a universal analogue?

Yes, there are universal thermostats that fit many models of refrigerators. The main thing is that the temperature range, the length of the capillary tube and the mounting method match. However, an original spare part is always preferable.

Why does the refrigerator not turn off after replacing the thermostat?

There may be several reasons: the adjustment screw inside the thermostat housing is incorrectly adjusted, a freon leak, a compressor malfunction, or an error when connecting the wires. It is also possible that the new thermostat is defective.

How long does it take to replace a thermostat yourself?

For an experienced technician, the process takes 20-30 minutes. For a beginner who disassembles the refrigerator for the first time and carefully performs all operations, this can take from 40 minutes to 1 hour.