The situation when a refrigerator Indesit stops maintaining the temperature correctly or stops freezing altogether often causes panic among owners. However, in many cases, the cause of the breakdown is the failure of a small control element - the temperature sensor. This component is responsible for reading temperature readings inside the chambers and transmitting a signal to the electronic control module.
If the sensor transmits incorrect data, the compressor may work continuously, trying to cool the chamber to non-existent values, or, conversely, not turn on at all. Understanding how to remove a temperature sensor from an Indesit refrigerator is a key skill for initial diagnosis and possible replacement of the part on your own.
In this article we will analyze in detail the algorithm of actions, the necessary tools and technical nuances that will allow you to safely remove the temperature sensor. Correct execution of the dismantling procedure will eliminate the risk of damage to the wiring or plastic elements of the unit body.
Principle of operation and location of sensors
Modern refrigerators of the brand Indesit use an electronic control system, where the temperature sensor plays the role of a sensor. Most often, thermistors are used, the resistance of which varies depending on the ambient temperature. Thermal sensor located in close proximity to the evaporator or in the air duct in order to read the data as accurately as possible.
The location of the element may vary depending on the model of the refrigerator. In units with a system No Frost sensors are often mounted in the plastic housing of the evaporator or mounted on the air ducts. In models with a drip defrosting system, they can be located on the back wall of the refrigerator or freezer compartment.
- 🔍 Main air temperature sensor - controls the general climate in the chamber.
- ❄️ Defrost sensor - monitors the evaporator temperature during defrosting.
- 🌡️ The “plus” chamber sensor is responsible for the upper compartment of the refrigerator.
⚠️ Attention: In different modifications of Indesit refrigerators, the number of sensors may vary. Before starting work, it is recommended to study the diagram of your specific device so as not to confuse the controls.
Incorrect operation of any of these elements leads to failures in the cooling cycles. For example, if the defrost sensor is “stuck,” the refrigerator may not go into defrost mode, which will lead to the formation of an ice coat and stopping air circulation.
Necessary tools and preparation
Before proceeding with dismantling, it is necessary to prepare the workplace and tools. High-quality preparation will reduce repair time and minimize the risk of losing small parts. You will need a standard home repair kit, supplemented with specialized diagnostic instruments.
The main tool for checking the serviceability of the element will be multimeter. Without it, it is impossible to determine whether the problem really lies in the sensor or whether the control module is faulty. You will also need screwdrivers of various types, since fasteners in Indesit refrigerators can be varied.
☑️ Preparation for repair
- 🔧 Set of screwdrivers (Phillips and flathead).
- 📏 Multimeter for measuring resistance.
- ✂️ A knife or plastic spatula for carefully opening the panels.
- 🧤 Work gloves to protect your hands from sharp edges.
It is important to ensure good lighting of the work area. The interior of the refrigerator is often dark, and the plastic parts can be fragile, especially if the unit has been in use for a long time. Sudden movements in low light can lead to breakage of the plastic latches.
Removal in the refrigerator compartment
The process of removing the temperature sensor in the refrigerator compartment usually begins with freeing up space. It is necessary to remove all shelves, drawers and containers that may interfere with access to the back wall. In some models Indesit the sensor is hidden behind a decorative plastic panel.
To remove the panel, carefully pry its edges with a plastic spatula or a flat screwdriver wrapped in a cloth to avoid leaving scratches. Fasteners may be hidden under plugs or stickers. After removing the panel, you will see the wiring and the sensor itself, which is often soldered into a plastic case or secured with a clip.
Dismantling requires caution, as the wires may be short. Thermal sensor attached to the wall or evaporator, and cannot simply be pulled out. It is necessary to carefully disconnect the connector, which is usually located deep in the case, closer to the electronic module, or directly at the base of the sensor.
Mounting features in different models
In some older Indesit models, the sensor may be filled with sealant. In this case, it must be carefully trimmed with a scalpel, being careful not to damage the sensitive element itself and the wires. The sealing will have to be restored after installing the new part.
Removing the sensor in the freezer and No Frost
In the freezer, especially in systems No Frost, the dismantling procedure is more complicated due to the presence of ice and a denser arrangement of components. If there is ice in the chamber, it must be completely defrosted before starting work. Trying to remove parts with ice will damage the plastic and wiring.
You can often get to the sensor in the No Frost system only through the back panel inside the freezer. It is attached with screws and plastic latches. After removing the panel, access to the evaporator opens, where the temperature and defrost sensors are located.
- 🧊 Defrost the chamber completely within 10-12 hours.
- 🔩 Unscrew the screws securing the rear panel.
- 🔌 Disconnect the sensor connectors, remembering them location.
- 🛠️ Carefully remove the sensor from the mounting socket.
⚠️ Attention: The plastic in the freezer becomes very fragile after prolonged use. Carry out all actions to remove panels and fasteners slowly, without using excessive force, to avoid chipping.
Often, the sensor in such systems is fixed in a special hole in the evaporator and secured with aluminum tape or a clip. When replacing, it is important to ensure tight contact of the new sensor with the surface of the evaporator for correct data reading.
Diagnostics and testing with a multimeter
After you have managed to remove the temperature sensor, you need to check its functionality. A visual inspection may not reveal defects, so the main diagnostic method is resistance measurement. A working thermistor should show a certain resistance, which changes with temperature changes.
To check, switch the multimeter to resistance measurement mode (Ohm). At room temperature (about +20...+25°C), a working Indesit refrigerator sensor usually shows a resistance in the range from 4 to 6 kOhm. The exact values depend on the specific model and type of sensor.
| Ambient temperature | Expected resistance | Element status |
|---|---|---|
| +25°C (Room) | 4.5 – 5.5 kOhm | Normal |
| 0°C (Ice water) | 8.0 – 10.0 kOhm | Normal |
| Any temperature | 0 kOhm or ∞ (infinity) | Faulty |
If the multimeter shows zero (short circuit) or infinity (open circuit), the part definitely requires replacement. It is also worth checking the wires for fractures or oxidation of the contacts at the junction with the connector.
Nuances of connecting and installing a new element
When installing a new one thermal sensor it is critically important to observe polarity, if it is provided for by the design, although many thermistors do not have polarity. However, it is strictly forbidden to mix up the connectors of different sensors (for example, a defrost sensor and an air sensor) - this will lead to incorrect operation of the refrigerator.
The wires should be laid so that they do not touch the moving parts of the fan (in No Frost systems) and are not pressed by sharp metal edges. To fix the sensor in the mounting location, use original fasteners or high-quality heat-resistant sealant if the design involves pouring.
After assembling all the panels and connecting the connector, you need to turn on the refrigerator and check its operation. Errors on the display (if any) should disappear, and the compressor should start working normally, turning on and off at the command of the thermostat.
Frequently asked questions (FAQ)
Is it possible to temporarily short-circuit the sensor to make the refrigerator work?
Theoretically, shorting or installing a resistor with a fixed resistance can force the compressor work constantly. However, this will lead to deep freezing of food, icing of the chamber and possible failure of the compressor due to continuous operation. This is not a solution to the problem, but a temporary and dangerous measure.
Where can I find the exact article number of the sensor for my Indesit model?
The article number is usually indicated on the sensor itself or in the technical documentation (diagram) of the refrigerator. You can also find the part number by the service number (S/N) of your model on the official websites of spare parts suppliers or in specialized catalogs.
Why does the refrigerator run jerkily after replacing the sensor?
This may indicate the wrong type of sensor installed (different resistance), poor contact in the connector, or the presence of other faults, such as a freon leak or a faulty start relay. It is necessary to double-check the compliance of the ratings of the new part.
Is it necessary to solder the wires when replacing the sensor?
In most cases, the sensors in Indesit refrigerators have standard connectors and soldering is not required. If the connector is damaged or missing, the connection must be made by soldering with mandatory insulation of the soldering area with heat shrink to avoid oxidation and short circuit in humidity conditions.