The situation when a refrigerator Indesit ceases to perform its main function always takes you by surprise. Products begin to deteriorate, moisture appears on the shelves or, conversely, everything becomes covered with an ice crust. Owners are often faced with the fact that the equipment seems to be humming, the light inside is on, but there is no proper cold. This is the first signal that a failure has occurred in the refrigerant circulation system or in the electronic control, requiring immediate intervention.
Modern models, whether classic Indesit C 138 or newer series with the system No Frostare quite complex. The problem may lie either in a banal filter blockage or in the failure of an expensive compressor. Understanding the nature of the malfunction helps not only to save on calling a technician, but also to prevent complete loss of products. In some cases, simple defrosting is sufficient, in others, professional sealing of the circuit will be required.
Ignoring the first signs of incorrect operation often leads to repairs being much more expensive. If you notice that the motor runs without stopping or, on the contrary, turns on extremely rarely, and the temperature in the chambers does not correspond to the set temperature, it is necessary to carry out initial diagnostics. Next, we will analyze in detail the main reasons why your unit may not freeze well, and ways to solve these problems.
Violation of tightness and problems with the seal
One of the most common reasons why a refrigerator Indesit does not cool food well is the loss of chamber sealing. If warm air from the room constantly penetrates inside, the system simply does not have time to cool it. As a result, the compressor works hard, trying to compensate for heat inflows, but the temperature in the main chamber remains high. Most often, the culprit is sealing rubber on the door.
Over time, the rubber loses its elasticity, cracks or deforms. Also, the seal may simply become contaminated with crumbs or sticky residue, causing the door to not fit tightly. You can check the tightness with a simple test with a sheet of paper: clamp the sheet with the door around the perimeter. If it pulls out without resistance or falls out on its own, then there is a gap in that place. In such cases, the cold disappears, and the equipment works in vain.
Sometimes the problem lies not in the rubber itself, but in door hinges. If the refrigerator is skewed or the hinges are loose, the door warps and does not fit tightly even with a working seal. This is especially true for models with a top freezer, where the load on the top hinge is high. Adjusting the hinges often solves the problem without replacing consumables.
If a visual inspection reveals serious damage to the rubber, such as deep cracks or separations, the element will need to be replaced. It is important to choose an original seal or a high-quality analogue, since a mismatch in the profile geometry will lead to the persistence of the problem. Failure to close the door tightly is not only wasted energy, but also the risk of compressor failure due to overheating.
Malfunctions of the defrosting system in No Frost models
In refrigerators Indesitequipped with the system No Frostthe lack of cold is often associated with a cycle violation defrosting the evaporator. Ice building up on the evaporator behind the rear wall is blocking air circulation. The fan moves the air, but it does not pass through the radiator, and the chamber becomes warm. In this case, it may be colder in the freezer than in the refrigerator compartment, or the cold is distributed unevenly.
The key elements of this system are Defrost heating element, defrost thermostat and timer (or electronic module). If the heating element burns out, the ice does not melt and turns into a block. If the thermostat is faulty, it may not give a command to turn on the heater or, conversely, may not turn it off on time. Diagnostics of these elements requires testing with a multimeter, since it is impossible to visually determine a break in the heating element spiral.
Symptoms of defrost malfunction
If you see ice on the back wall of the refrigerator compartment or hear the fan touching the ice (crackling, humming), but there is no cold, these are classic signs of a malfunction in the defrosting system.
Another important unit is defrost sensor. It monitors the evaporator temperature and tells the control module when to stop heating. If the sensor is lying, the defrost cycle may not start at all. In models with electronic control, sensor errors are often displayed by blinking indicators on the control panel, which simplifies troubleshooting.
To fix the problem, it is often necessary to completely defrost the refrigerator in the off state for 24 hours. This will allow the ice to melt and free up the circulation channels. However, if the cause is a burnt heating element or sensor, once turned on the problem will return within a few days or weeks. In such cases, it is necessary to replace the defective part.
Problems with the compressor and start relay
The heart of any refrigerator is compressor. If it does not work correctly, no cold is generated at all. In refrigerators Indesit there are often situations when the motor hums, clicks, but does not start, or works continuously without turning off. In the first case, the starting relay is often to blame, in the second - a freon leak or loss of performance of the compressor itself.
The starting relay is a small unit that provides an impulse to start the engine. Over time, the contacts in it burn out, or the bimetallic strip loses its properties. The symptoms are simple: a click is heard, the motor tries to hum for a few seconds, then another click and silence. Replacing the relay is a simple and inexpensive procedure that you can do yourself if you have basic skills.
If the compressor runs continuously without turning off, but there is not enough cold, this may indicate loss of compression. The pistons wear out, the valves leak gas, and the pressure in the system drops. You can check this by measuring the current consumed by the motor or the output pressure. At home, an indirect sign is weak heating of the condenser (grid at the back) - it should be hot, not barely warm.
It is also worth paying attention to the noise level. If knocking, grinding or metallic clanging is added to the usual hum, this indicates mechanical destruction of the internal components of the compressor. In such a situation, it is better to turn off the unit and call a technician, since further operation may lead to complete jamming of the engine.
Refrigerant leak and capillary tube blockage
These two technical problems often go together or manifest similar symptoms: the refrigerator turns on, works, but does not freeze. Freon leak may occur due to corrosion of the evaporator tubes (especially in models with a foamed evaporator) or mechanical damage due to careless defrosting with a knife. The freon evaporates, and there is simply nothing to circulate in the system.
Clogged capillary tube is a blockage of the thin channel through which the refrigerant enters the evaporator. The cause is moisture in the system, which turns into an ice plug, or oil oxidation products mixed with debris. When clogged, the compressor works with increased load, trying to push gas, but circulation is disrupted. A characteristic sign is a hot condenser only in the first part, and then the tube is cold.
| Symptom | Freon leak | Clogged capillary |
|---|---|---|
| Compressor operation | Works for a long time or constantly | Works with overload, can overheat |
| Condenser temperature | Barely warm or cold | Hot at the beginning, cold after bending |
| Evaporator | Clean, no ice | Partial ice or bloating |
| Solution | Searching for leaks, sealing, refilling | Blowing with nitrogen, replacing the filter-drier |
If you noticed a swelling of the wall inside the refrigerator compartment, this is a sure sign that the evaporator has rotted and the freon has gone. Repair in this case is labor-intensive: it requires either installing an external evaporator (“crying” on the back wall), which spoils the appearance, or replacing the internal box, which is often not economically feasible for older models.
It is important to understand that to diagnose these conditions, the technician uses a pressure gauge station. By the pressure in the system and the behavior of the pressure gauge needle when turning the compressor on and off, you can tell exactly what happened: gas has escaped or a blockage has arisen. Without this equipment, any actions will be fortune telling on coffee grounds.
Failures in the operation of the thermostat and electronics
A (thermostat) or an electronic control module is responsible for maintaining the set temperature. If the thermostat is mechanical, it is a sensor with a capillary tube that opens the contacts when the desired cold is reached. If the contacts are stuck in the “open” position, the compressor will not receive a command to start, and the refrigerator will stop freezing. thermostat (thermostat) or electronic control module. If the thermostat is mechanical, it is a sensor with a capillary tube that opens the contacts when the desired cold is reached. If the contacts are stuck in the open position, the compressor will not receive a command to start and the refrigerator will stop freezing.
In models with electronic control (for example, series Indesit Smart), the board is responsible for all processes. Power surges in the network can damage the elements of the board, and it will stop sending a signal to the compressor or fan. Sometimes the problem is solved by resetting the settings or rebooting, but more often diagnostics and replacement of board components are required.
⚠️ Attention: If you plan to check the thermostat with a multimeter, be sure to unplug the refrigerator! Ringing live contacts is strictly prohibited and is dangerous to life.
The temperature sensor built into the camera may also give incorrect readings. If it “tells” the module that it is -10°C in the chamber, although it is +10°C there, the refrigerator simply will not turn on. Checking the sensor resistance at different temperatures (using the resistance table for a specific model) allows you to identify such a malfunction.
☑️ Primary electronics diagnostics
The influence of operating conditions and loading rules
Sometimes the reason for poor performance lies not in a breakdown, but in a violation of operating rules. Overload the refrigerator with food, especially warm ones, forces the equipment to work at the limit of its capabilities. If you put a pot of hot soup, the refrigerator will try to cool the entire volume of air, and the temperature in the chamber will temporarily jump.
It is also important to position the food correctly. If you pack the shelves tightly so that air does not circulate, the cold will not be distributed evenly. In systems No Frost this is critical: the air supply holes on the back wall should not be covered with bags or boxes. Impaired circulation leads to local overheating and spoilage of food.
The location of the refrigerator also plays a role. If it stands close to the wall or next to the radiator/stove, the heat transfer of the condenser is disrupted. The compressor overheats and can be switched off by the thermal relay before it has time to reach the desired temperature. The distance to the walls should be at least 5-7 cm for free air circulation.
Why can’t you put hot food?
Inserting hot products not only increases the temperature in the chamber, but also increases humidity, which leads to increased ice formation on the evaporator and malfunctions of the defrosting system.
The regularity of defrosting (for drip systems) also affects efficiency. If you rarely defrost your refrigerator, the layer of ice on the back wall becomes too thick and acts as an insulator, preventing cooling. Keep the drainage hole clean through which the water goes into the container above the compressor.
Frequently asked questions (FAQ)
Why does the Indesit refrigerator hum but not freeze?
This may indicate a freon leak, a clogged capillary system or a compressor malfunction (loss of compression). It is also possible that the fan in No Frost models does not start due to icing.
How long should defrosting last in case of problems with No Frost?
For the ice in the hidden cavities of the evaporator to completely melt, the refrigerator must be turned off with the doors open for at least 24 hours. A shorter defrosting may not eliminate the ice jam.
Is it possible to use a refrigerator if it does not freeze well?
Short-term - yes, but this is dangerous for a compressor that works without rest. In addition, in a chamber with an elevated temperature, bacteria quickly multiply, which can lead to food poisoning.
How often do you need to change the sealing gum?
The service life of the seal is on average 5-7 years. If it cracks, becomes hard, or no longer holds magnetic contact, replacement must be made immediately, regardless of service life.