The situation when the refrigerator compressor Indesit hums, the indicators are on, and the temperature inside the chambers is close to room temperature is one of the most common and alarming. Owners often encounter this suddenly: food begins to deteriorate, and equipment makes the usual sounds of operation, creating a false impression of serviceability. However, the absence of cold when the engine is running indicates a violation of the refrigerant circulation cycle or a failure in the control system.
The main task of the unit is to remove heat from the internal space to the outside. If this process is stopped, but the engine continues to rotate, it means that physical work is being done, but the beneficial effect is not achieved. Most often, the problem lies in freon leakclogging of the capillary tube or failure of the compressor. In some cases, the culprit is the electronic control module, which sends incorrect signals to the actuators.
Before calling a technician, it is necessary to carry out initial diagnostics to exclude trivial causes, such as incorrect installation or lost settings. Understanding the principles of operation of the refrigeration circuit will help you more accurately describe the problem to a specialist or, perhaps, fix the problem yourself if it does not require special tools. Let's look at the main breakdown scenarios.
⚠️ Attention: If you hear a loud bang or smell a burning smell immediately after the refrigerator stops freezing, immediately unplug the appliance. Continued operation may lead to a fire in the wiring.
Checking the settings and operating mode
Sometimes the reason for the lack of cold is trivial and lies in the human factor. Modern models Indesit with electronic control (No Frost) and even simpler mechanical versions can be accidentally switched to a mode in which cooling is turned off. First of all, check the control panel. The Holiday or Eco mode may have been activated, which only keeps the freezer compartment at minimum temperature while leaving the refrigerator compartment warm.
Make sure the temperature control is not set to the minimum setting. In mechanical models this is a rotary knob, in electronic models it is a touch panel. It is also worth checking the tightness of the door. If seal is worn out or the door is skewed, warm air constantly enters inside, and the unit simply does not have time to cool it, working for wear.
- 🔍 Check whether the “Super Freeze” mode is turned on for an indefinitely long time - this can block the normal cycle.
- 🚪 Assess the condition of the rubber door seal: it should be clean and elastic.
- ❄️ Make sure that food does not block the ventilation holes inside the chamber.
If you have just defrosted the unit, let it run for several hours without loading food. The compressor needs time to reach operating mode and stabilize the pressure in the system.
Refrigerant leak: symptoms and search
One of the most common reasons why Indesit it hums, but does not freeze, is a banal freon leak. The refrigerant circulates in a closed circuit, and if a microcrack appears in the system, the gas gradually evaporates. As a result, the compressor runs idle: it pumps what is left, but the cooling capacity drops to zero. It is difficult to determine a leak visually, since freon is colorless and odorless.
The condition of the evaporator can serve as an indirect sign. If you defrost the refrigerator completely and look behind the back wall (in models with a drip system), then if the system is working properly, frost should cover the tubes evenly. If there is a leak, frost will be partial or absent altogether. Also, oily stains may appear on the floor under the unit or near the compressor - this is oil from the compressor, which comes out along with the gas through a crack.
| Symptom | Probable cause | Difficulty of repair |
|---|---|---|
| The compressor is hot, but cold | Freon leak | High (needs a technician) |
| Frost only at the outlet of the compressor | Capillary clogged | Medium |
| Complete absence of cold | Compressor failure | High |
It is almost impossible to independently find the leak without a leak detector. You can use a soap solution to smear the joints of the tubes, but this is only effective for large fistulas. Most often, freon escapes through corrosion of the circuit in the foamed part of the body or through joints. Refilling with freon requires evacuation of the system and strict adherence to dosages, so you can’t do without a specialist here.
Is it possible to refill the refrigerator yourself?
Theoretically, it is possible if you have the equipment (a cylinder with freon, scales, a vacuum pump, a burner). However, without experience, there is a high risk of explosion or damage to the compressor due to moisture entering the system.
Faults of the compressor and start relay
The heart of the refrigerator is compressor. If it hums but doesn't start (you hear a beep and click every few seconds), the problem may be with the start relay or the motor itself. The relay is a small plastic block that fits onto the side of the compressor rod. It gives the impulse to start. Over time, the contacts in the relay burn out, and it ceases to perform its function.
If the compressor works constantly, without turning off, but there is no cold, this may indicate that the compression has lost its properties. The piston group could be worn out, and the motor is not able to create the necessary pressure for gas circulation. In this case, the unit will work continuously, consuming a lot of electricity, but not fulfilling its task. This can be determined by the temperature of the case: a serviceable working compressor is hot, but a “squeezed out” one can be barely warm or, conversely, red-hot.
- 🔊 A loud knock or clang during startup indicates mechanical destruction of the compressor components.
- ⚡ Frequent clicks of the relay indicate attempts to start and immediate shutdown by protection.
- 🌡️ Check the temperature of the tubes near the compressor: one should be hot, the other should be warm.
Replacing the start relay is one of the few procedures available for self-repair. You need to remove the old relay, photograph the wiring diagram and install a new one that matches your model Indesit. However, if the problem is inside the motor itself, an expensive replacement of the entire unit will be required.
☑️ Compressor diagnostics
Clogged capillary tube and filter drier
There is a bottleneck in the freon circulation system - the capillary tube. Its diameter is extremely small, and this is where the refrigerant throttling occurs. If there is moisture or oil breakdown products in the system, they can freeze or accumulate, forming an ice plug or sludge blockage. As a result, freon cannot pass further, and circulation stops.
Symptoms of a blockage are often confused with a leak. The compressor works, sometimes even louder than usual, trying to push gas, but there is no cold. A characteristic symptom is localized freezing: the tube may become covered with frost just in front of the blockage, while the rest of the system remains warm. You may also experience an unnaturally hot condenser (grille at the back) as the heat is not dissipated effectively.
To correct this problem, the system must be purged with high pressure nitrogen and replacing the filter drier. The filter traps moisture and debris, and if it is clogged, its throughput decreases. This procedure requires professional equipment: a nitrogen cylinder, a reducer and a soldering torch.
⚠️ Attention: Under no circumstances try to break through the blockage mechanically or with a needle. This will lead to depressurization of the tube and complete failure of the system. Evacuation is required.
Problems with sensors and electronics
In modern refrigerators Indesit electronics are responsible for the temperature regime. If the temperature sensor (thermistor) fails, it can send an incorrect signal to the control module that the chamber is already cold. Having received false data, the “brain” of the refrigerator does not give a command to turn on the compressor, although the indicators may be on, or, conversely, keeps the motor on constantly.
It is also worth mentioning the malfunction defrost sensor in No Frost systems. If it “lies,” the evaporator may become covered with ice, which will block the cold air supply channels into the chamber. Visually, the chamber will be warm, but if you look behind the back panel, you can find an ice monolith there. In this case, the refrigerator operates, but the air does not circulate.
- 📉 A flashing temperature indicator often indicates a sensor error.
- 🧊 Ice on the back wall of the refrigerator compartment is a sign of problems with defrosting.
- 🔌 Electronics failure can occur after a power surge.
Electronics diagnostics require a multimeter. It is necessary to “ring” the sensors for resistance at different temperatures and compare the readings with the table of ratings for your model. If the resistance is normal, but the refrigerator behaves strangely, the control module itself may be faulty.
Influence of the environment and operating rules
Do not forget that operating conditions directly affect the ability of the refrigerator to cool. If the unit is standing close to the wall, in a niche or next to the radiator, heat exchange is disrupted. The capacitor does not have time to cool down, and operating efficiency decreases. Ambient temperature is also critical: most refrigerators Indesit are not designed to operate in unheated rooms at temperatures below +10°C or above +32°C.
It is important to ensure proper ventilation. The gap between the rear wall of the refrigerator and the wall should be at least 5-7 cm. If the unit is built into a kitchen unit, ventilation grilles should be provided in the base and top of the cabinet. Overheating of the compressor due to stuffiness is a common reason for its stopping due to thermal protection.
⚠️ Attention: Installing a refrigerator on an unheated balcony in winter can lead to the oil in the compressor solidifying and the valves being destroyed during the first start. This is not a warranty case.
In addition, frequent opening of the door or loading of hot products creates excessive heat load. In such cases, the refrigerator may run continuously but cannot cope with the amount of heat. Give the unit time to restore the temperature regime without overloading it with new portions of warm products.
Frequently asked questions (FAQ)
Why does the Indesit refrigerator hum, but does not freeze after defrosting?
If you defrosted the refrigerator for less than 6-8 hours, there could be ice remains, which interferes with work. Also, during defrosting, water could leak into the electrical part, causing a short circuit. Let the equipment stand turned off for another day in a dry room.
Is it possible to use a refrigerator if it does not freeze, but works?
It is strictly not recommended. The compressor operates without cooling, which leads to its overheating and eventual combustion of the windings. In addition, the products will deteriorate, creating a favorable environment for bacteria.
How much does repair cost if the cold is gone?
The cost depends on the breakdown. Refilling with freon and finding leaks will cost less than replacing the compressor. The exact price can only be given after diagnostics by a technician on site.
How to understand that the compressor has burned out?
If you hear a click when you turn it on, the beep lasts 2-3 seconds and then click again (protection), and the compressor itself is cold or barely warm - most likely the problem is in the start relay or inter-turn short circuit of the windings motor.