How to replace the thermostat in the Indesit refrigerator: step-by-step instructions

A sudden stop of the compressor or, conversely, its endless operation often indicates a failure of the temperature sensor. In household refrigerators Indesit a thermostat is responsible for this process, which opens or closes the electrical circuit depending on the degree of heating of the evaporator. If you notice that food in the chamber has stopped melting or, on the contrary, bottled water left on the shelf is freezing, most likely the problem lies in this unit.

Independently replacing the temperature control element is a very real task for a person who knows how to hold a screwdriver in his hands and follows safety precautions. You don't have to call a technician if you're willing to spend about an hour carefully disassembling the unit. The main thing is to correctly diagnose the malfunction and select a compatible spare part, since thermostats the length of the capillary tube and the method of fastening may differ.

Before proceeding with dismantling, make sure that the refrigerator is completely disconnected from the power supply. Any manipulation of live electrical components is strictly prohibited and may result in electric shock or damage to the compressor. Next, we will look at a detailed algorithm of actions that will help you bring your equipment Indesit to life.

Diagnostics of a thermostat malfunction

The first step should always be to accurately identify the problem so as not to change working parts. If the refrigerator compressor Indesit does not turn on at all, although the light bulb is on, this may indicate an open circuit inside the thermostat. In this case, the electric current simply does not reach the motor starting relay. You can check this by short-circuiting the wires coming from the regulator, but this should be done carefully, using an insulated tool.

The opposite situation, when the unit works non-stop and gets very cold, is also a classic symptom. In this case, the contacts inside the sensor are “stuck” in a closed state, and the system does not receive a signal that the set temperature has been reached. Sometimes the cause may be a freon leak from the capillary tube of the thermostat itself, which is why the pressure inside it does not change when heat fluctuates.

⚠️ Attention: If you hear clicks from the thermostat, but the compressor does not start, the problem may not be in the sensor, but in the start relay or the motor itself. Do not rush to replace until you are sure of the integrity of the circuit.

For a final check, you can use a multimeter in continuity mode. At room temperature, most thermostat contacts should be closed. If the device shows a break, and the regulator knob is turned to the maximum cold position, the part requires replacement. Also visually inspect the capillary tube for damage or signs of corrosion.

Necessary tools and workplace preparation

To successfully carry out repair work, you will need a minimum set of tools that most home craftsmen can find. The key is to have a working multimeter to check the electrical contacts of the new and old parts. Without this device, replacement is done “at random,” which does not always guarantee results, especially if the problem was complex.

It is important to prepare a convenient place for disassembling the refrigerator Indesit. You will need enough space around the unit so that there is nothing in the way of opening doors and removing panels. Make sure you have good lighting in advance, as internal mechanisms are often hidden in dark niches where it is easy to lose small screws or mounting clips.

The list of necessary equipment includes:

• 🔧 A set of screwdrivers (Phillips of different sizes and one flat one for prying up the latches).
• ⚡ Multimeter for checking the continuity of the circuit.
• 🔦 A powerful flashlight or headlamp.
• 🧤 Work gloves to protect your hands from sharp metal edges.
• 📸 Smartphone for photographing the wiring diagram.

Access to the thermostat: disassembling the refrigerator compartment

In most refrigerator models Indesit the thermostat is located inside the refrigerator compartment. Access to it is usually hidden behind a plastic panel where the lighting lamp is installed, or is located directly on the chamber wall next to the temperature control knob. The dismantling process may differ depending on the specific series, for example Indesit C 132 G or more modern models with electronic control, where the sensor is placed outside.

If the regulator handle is inside, you first need to remove the plastic handle itself. It can be kept in a tight fit or secured with a locking screw under a decorative cap. Carefully pry up the plug with a flathead screwdriver, unscrew the screw and pull the handle towards you. After this, access to the fastening elements of the main unit will open.

Often the thermostat is covered by the lampshade. To remove it, you may need to unscrew a screw or gently press out the plastic clips on the sides. Do not use excessive force, as the plastic on older refrigerators becomes brittle and can crack if handled carelessly. Under the lampshade you will see the thermostat housing, which includes a capillary tube.

Removing the old thermostat and installing the new

Properly disconnecting the wires is a critical step. Before removing the terminals, be sure to take a close-up photo of the connection. The colors of the wires may not correspond to standard markings due to burnout or previous repairs, so visual fixation of the circuit Wire-to-Terminal will protect you from errors during assembly.

After turning off the electrics, you must remove the capillary tube from the evaporator. It passes through a special hole in the chamber wall and can be secured with sealant or simply inserted into the groove. Gently pull the tube towards you, being careful not to bend it sharply, as there is sensitive freon gas inside. A sharp bend or damage to the tube will make the new thermostat inoperative.

Installation of the new part is carried out in the reverse order. Insert the capillary tube into the hole until it stops, ensuring tight contact with the evaporator. The length of the tube must match the original; if it is too long, it can be carefully twisted into a ring, but not shortened or pinched. Secure the housing in the seat and connect the wires according to the photo taken earlier.

⚠️ Attention: The capillary tube of the thermostat is very thin and sensitive to mechanical damage. Do not use pliers to pull it directly by the tube - act only on the plastic body or special mounting ears.

After physically installing the part, check the reliability of all connections. The wires should not dangle or touch moving parts, if any, nearby. Make sure that the rubber seal of the hole through which the tube passes fits tightly to prevent warm air from entering the chamber.

Comparison of characteristics of thermostats for Indesit

When purchasing a spare part, it is important to pay attention not only to brand compatibility, but also to specific technical parameters. Thermostats may differ in switching and switching temperatures, as well as in the length of the stem. Using the wrong part will lead to incorrect operation of the refrigerator: it will either undercool the food or work non-stop.

Below is a table with common types of thermostats used in technology Indesitand their main characteristics. This will help you navigate when choosing an analogue if the original number is not available.

Setting up and checking the system's performance

After assembling the refrigerator and plugging it into the network, you should not expect instant results. It will take time for the compressor to ramp up and begin cooling. The primary cycle can take from 30 minutes to 2 hours depending on the ambient temperature in the room and the number of loaded products.

Set the thermostat knob to the middle position (usually number 3 or 4). This is the optimal mode for starting, allowing the system to reach its operating rhythm. If after an hour of operation the walls of the chamber have not begun to cool, and the compressor is working, perhaps the thermostat does not sense the cold due to poor contact of the tube with the evaporator.

Checking the cyclic operation is an important step. The refrigerator should automatically turn off when the set temperature is reached and turn on when it rises. If the unit operates continuously for more than 3-4 hours, try turning the control knob counterclockwise. If the stop does not occur even at minimum, perhaps the installed thermostat has the wrong range or is defective.

Common mistakes during self-repair

One of the common mistakes is ignoring the condition of the door seal. If the rubber band allows heat to pass through, the compressor will run constantly, and the owner may mistakenly believe that the thermostat is faulty. Before replacing electronics, always check the circuit for leaks using a piece of paper or visual inspection for cracks.

Another mistake is improper installation of the capillary tube. If it is not fully inserted into the evaporator socket or is pressed on the wrong side, the sensor will show the air temperature in the chamber, and not the evaporator temperature. This will lead to large temperature changes and frequent engine starts, which reduces its resource.

⚠️ Attention: Technical characteristics of Indesit refrigerators may vary slightly depending on the year of manufacture and region of assembly. Always check the markings of the removed part with the new one before installation, even if they are externally identical.

Also, do not forget about the cleanliness of the contacts. Oxidized terminals can create additional resistance, causing heat and false readings. When installing a new thermostat, it is recommended to clean the contact pads on the wires, if plaque is visible on them, and tightly crimp the terminals.

FAQ: Frequently asked questions