The situation when Indesit refrigerator stops cooling products, but the compressor continues a humming sound is a classic sign of a serious problem with the cooling system. Owners often notice that it becomes warm in the refrigerator compartment, and in the freezer either the ice melts or, conversely, a huge coat of ice forms, blocking the access of cold air. It is important to understand that a running motor in this case is not a sign of serviceability, but rather an indicator that the unit is trying to perform its function, but is physically unable to do so due to internal obstacles.
Before calling a technician, it is necessary to conduct a primary diagnosis to exclude trivial causes, such as improper installation or damage to the seal. However, if you are sure that the equipment is installed according to the rules and the doors close tightly, the problem lies deeper - in the circulation of the refrigerant or the management of temperature conditions. Ignoring the problem at an early stage it can lead to complete failure of an expensive compressor, since it runs idle, overheating without proper load.
In this article we will analyze in detail the technical aspects of malfunctions of models Indesit, including systems No Frost and drip type. You will learn how to distinguish a freon leak from a clogged capillary tube, why the fan may not turn on, and what to do if the defrost sensor burns out. We will also touch upon issues of software failure of the electronic control module, which often becomes the hidden culprit when cooling stops.
Failure of the circuit tightness and refrigerant leak
The most common reason why Indesit refrigerator stops freezing is a banal freon leak. The refrigerant is the “lifeblood” of the refrigeration system, and if its quantity drops below a critical level, heat exchange becomes impossible. The compressor continues to operate, trying to pump gas through the system, but due to the small volume of the substance, the pressure does not reach the required values for boiling and heat absorption in the evaporator. You may notice that the motor works with short pauses or, conversely, non-stop, trying to gain temperature.
A leak can occur anywhere in the circuit: in the foamed part of the case, in the condenser on the back wall or in the places where the tubes are soldered. Microcracks often form due to metal corrosion, especially if the equipment is operated in a damp room or the rear grille is rarely cleaned. In models with the system No Frost leakage often occurs in the freezer circuit, where the evaporator is hidden under a plastic panel.
⚠️ Attention: If you find an oily spot under the refrigerator or on the tubes at the back, this is a sure sign of depressurization. The freon evaporates, but the oil remains, signaling the location of the breakdown.
To accurately determine the location of the leak, technicians use leak detectors and the soaping method, but at home you can rely on indirect signs. For example, if, when the compressor is running, the condenser (black grille at the back) remains only partially cold or warm, but the chambers are warm, then the probability of a leak is more than 80%. This is also indicated by the absence of a characteristic gurgling or hissing sound when the engine stops.
Clogged capillary tube with ice plug or debris
The second most common reason for the lack of cold when the engine is running is clogged capillary pipeline. This unit is a thin copper tube through which refrigerant flows under high pressure into the evaporator. If there is moisture in the circulation system, it freezes at the narrowest point of the capillary, forming an ice plug that completely blocks the movement of freon. As a result, the evaporator is empty and warm, and the condenser may be hot, since the gas cannot pass further.
The blockage can be caused not only by ice, but also by oil oxidation products or technical debris remaining after poor-quality previous repairs. In such cases, the compressor works with increased load, trying to push gas through the obstacle, which is often accompanied by a louder hum and more heating of the motor housing. The system may periodically “thaw” if the plug is icy: the refrigerator begins to freeze, then stops again, and the cycle repeats.
How to distinguish a clog from a leak?
When the capillary is clogged, the condenser is often very hot, to the point of being impossible to touch, and when there is a leak, it is usually warm or cold. Also, if there is a blockage, the pressure at the outlet of the compressor will be abnormally high.
To eliminate this malfunction, professional intervention is required: the technician must pressurize the system with nitrogen, replace the filter-drier and, possibly, part of the capillary tube. Trying to break through the blockage on your own by heating the tube with a hairdryer or hammer is strictly not recommended - this can lead to rupture of thin-walled elements or ignition of the oil in the system.
Faults in the No Frost defrost system
If your Indesit equipped with a system No Frostthen the lack of cold is often associated with a breakdown of one of the elements of the automatic defrosting of the evaporator. In such models, the cold is generated in a hidden freezer compartment and distributed by a fan among the chambers. Over time, a layer of ice builds up on the evaporator, which must be periodically removed by a heating element (heating element). If this process is disrupted, the ice completely blocks the air channels, and the cold simply does not enter the refrigeration chamber.
Several key components are involved in the defrost chain: the evaporator heating element, the defrost sensor (thermostat), a fuse and a timer or electronic module. Failure of any of them stops the defrosting cycle. For example, if a heating element burns out, the ice does not melt. If the sensor is stuck, it may “think” that the temperature is already high and not turn on the heating. As a result, in 2-3 weeks such a coat of ice freezes that the fan stops moving air.
☑️ Diagnostics of the No Frost system
To diagnose the problem, you often have to disassemble the back wall of the freezer. You can visually assess the amount of ice: if the evaporator has turned into a monolithic piece of ice, and the fan is humming but not blowing, then the defrost system is not working. In some cases, the ice also blocks the fan itself, which is why a cracking or buzzing sound is heard, but there is no airflow.
Failure of the evaporator blower fan
In refrigerators with forced air circulation (No Frost and some models Full No Frost) for cold distribution a special fan answers. If the motor is running, freon is circulating, the evaporator is cold, but the chambers are warm, perhaps this particular fan has failed. Without it, cold air remains in the technical compartment and does not reach the products.
The reasons for fan failure can be different: wear of the plain bearings, breakage of the motor winding, or mechanical blocking of the blades with ice. Often the user hears that the refrigerator is humming, but does not notice the characteristic noise of the fan inside the chamber. In models with one fan for both circuits, stopping it leads to defrosting of both the refrigerator and freezer compartments.
You can check the operation of the fan by opening the door of the refrigerator compartment (in some models) and holding the door open sensor to simulate closing. If, with the door closed and the compressor running, you do not hear air noise or do not feel the flow from the air ducts, the fan requires replacement or defrosting.
Failures in the operation of the thermostat and electronic module
The operation of the compressor and other systems is controlled by a thermostat (in mechanical models) or an electronic control module (in models with a display). If thermostat is faulty, it may not send a signal to turn on the compressor, although in our case the motor is working. However, there are situations when the thermostat “lies” about the temperature inside the chamber, not giving a command to work harder or, conversely, not turning off the unit in time.
In electronic models Indesit The control board is responsible for all processes. Power surges in the network, moisture ingress or manufacturing defects can lead to a software failure or burnout of the triacs that control the heating elements and the compressor. In this case, the refrigerator may operate in emergency mode: the motor hums, but the defrost cycles do not start, or the compressor runs continuously without pauses.
Diagnostics of electronics requires special knowledge and equipment. If you notice that the refrigerator behaves inappropriately (spontaneously turns on and off, does not maintain the temperature even if the sensors are working), the problem most likely lies in the “brains” of the unit. Sometimes a complete power reset for 15-20 minutes helps, but this is only a temporary measure.
Comparative table of symptoms and causes
For ease of diagnosis, the main symptoms and probable causes can be summarized in a single table. This will help you navigate the nature of the malfunction before calling a specialist.
| Symptom | Probable cause | Nature of motor operation |
|---|---|---|
| Heat everywhere, cold capacitor | Leakage freon | Works for a long time or without stopping |
| Heat everywhere, the condenser is very hot | Clogged capillary tube | Works with overload, buzzing |
| B the refrigerator is warm, there is a coat of ice in the freezer | Malfunction of the defrost system (No Frost) | Works normally |
| The refrigerator is humming, but there is no cold anywhere | The fan does not work airflow | Works normally, there is no air noise |
Analysis of these signs allows you to narrow down your search. However, remember that only a specialist can make an accurate diagnosis using a pressure manifold and a tester. Self-diagnosis is good for understanding the scale of the problem, but does not always give a 100% guarantee of the correctness of the conclusion.
When you need to call a professional technician
Repairing refrigeration equipment often requires not only theoretical knowledge, but also specialized tools: vacuum pumps, freon filling stations, torches for soldering with silver-containing solders. If the problem is a leak or clog, DIY repairs at home are nearly impossible and dangerous. Unprofessional soldering can lead to repeated leakage after a short time or even a fire.
In addition, working with refrigerants requires compliance with environmental standards and safety regulations. Freon released under pressure can cause frostbite, and when in contact with an open flame, some types of gases form toxic compounds. Therefore, if you determine that the issue is not defrosting or adjusting the thermostat, it is better to entrust the matter to a pro.
⚠️ Attention: Do not try to open the sealed circuit or pierce the tubes yourself. This will lead to an immediate release of gas and will require a complex and expensive system restoration procedure.
Calling a technician is also justified if the compressor needs to be replaced. This process includes not only installing a new motor, but also flushing the system, replacing the filter drier and accurately charging the refrigerant by weight. An error in the amount of freon will lead to the previous breakdown of the new compressor.
Prevention and proper operation
In order for Indesit refrigerator to serve for a long time and not require frequent repairs, it is important to follow the operating rules. Regular defrosting (for drip systems) at least once a year, even if the manufacturer claims a No Frost system, helps prevent the formation of old ice plugs in hard-to-reach places. You should also monitor the cleanliness of the condenser at the back: dust and animal hair adhering to the grille impair heat transfer, causing the motor to wear out.
Do not load the chambers with products above the marking level or simply abundantly, blocking the air ducts. Impaired air circulation inside the chambers leads to local overloads of the cooling system. In addition, hot foods placed on the shelf create excess moisture, which settles on the evaporator and contributes to the rapid formation of an ice coat.
Keep an eye on the position of the refrigerator: it must stand strictly horizontally or with a slight tilt back so that the doors close on their own. Misalignment of the housing can disrupt the operation of the condensate drainage system and lead to water flowing into the housing, which causes corrosion and short circuits.
Why does the refrigerator hum, but does not freeze after defrosting?
If after complete defrosting (more than 24 hours) the refrigerator turns on, the motor runs, but the cold does not appear, this may indicate a capillary blockage moisture that has not had time to evaporate, or a serious freon leak. It is also possible that during defrosting you damaged the internal elements or did not wait for the electronics to dry completely.
Is it possible to add freon yourself?
Absolutely not. To refill, you need to know the type of refrigerant, the exact dosage in grams, have a vacuum pump to remove air and moisture from the system, as well as special equipment for soldering. Simply “adding” gas without eliminating the cause of the leak and evacuation of the system will not give a result.
How long should the refrigerator operate after turning on?
After turning on or defrosting Indesit refrigerator it may take from 2 to 12 hours to reach operating mode and freeze food to the set temperature. At this time, the motor can operate almost without interruption. It makes no sense to evaluate the operation of the unit before this time.
What to do if there is water in the refrigerator, but it does not freeze?
The presence of water often indicates that the food has defrosted. First, check to see if the drain hole in the back of the chamber is clogged. If the water is at the bottom and there is heat in the chambers, this is confirmation that the cooling system is not working (leakage, blockage, compressor failure). You urgently need to turn off the device, defrost it and call a technician.