The situation when the owner discovers that he cannot hear how the Indesit refrigerator works often causes panic. It would seem that silence is good, but for household appliances this is a sure sign that the cooling cycle has not started. Unlike modern inverter models, which can operate almost silently, classic Indesit units emit a characteristic hum of a running motor. If you approach the device and do not hear the usual hum, and the products inside have already begun to heat up, it means that there has been a failure in the system.
Primary diagnosis should begin with an assessment of the general condition: is the light on inside, is there cold on the back wall. It is important not to ignore this symptom, since a prolonged absence of cold will lead to deterioration of supplies and the proliferation of bacteria. Lack of sound may indicate either a banal power outage or a complex technical failure of components.
In this article we will analyze in detail the mechanical and electrical reasons for the silence of your unit. You will learn to distinguish between situations when repairs are possible with your own hands, and cases that require calling a specialist with professional equipment. Understanding the operating principles of compressor and start relay will help you quickly isolate the problem.
⚠️ Attention: If you smell burning or see sparking in the area of the motor, immediately disconnect the device from the network and do not try to turn it on again until the fault is eliminated.
Checking the power supply and network parameters
The most commonplace, but often overlooked reason is the lack of voltage in the outlet. Before sinning on complex electronics or a burnt-out motor, you need to make sure that electric current generally reaches the device. Sometimes the problem lies in a knocked-out machine on the shield or oxidized contacts of the plug. Try connecting another powerful device, such as a hairdryer or kettle, to the same outlet to check its functionality.
It is also worth inspecting the refrigerator's power cord for damage. Rodents, furniture, or simply time could have damaged the integrity of the insulation or wire cores. If the cable is visually intact, check the tightness of the connection between the plug and the socket. In old houses with poor wiring, the voltage may be unstable, which causes the equipment's protective mechanisms to block startup.
Some Indesit models have internal surge protection installed. If there was a sudden surge in the network, electronics could go into standby or locked mode. In this case, silence is a defensive reaction. Control unit could detect an error and turn off the power to the compressor to prevent it from burning out. Try to completely turn off the power to the refrigerator for 15-20 minutes, and then turn it on again.
If after rebooting the Indesit refrigerator still does not make sounds and does not start to cool, the problem lies deeper. It is worth paying attention to the condition of the plug: if it gets very hot during operation, this is a sign of poor contact that needs to be eliminated. Also check to see if the wire is broken at the very base of the plug or the entrance to the housing.
Malfunctions of the starting relay and compressor
If everything is in order with the electricity, but silence remains, the most likely candidate for a breakdown is start relay. This small element is responsible for starting the compressor engine. Inside it there is a coil or posistor, which over time can burn out or oxidize. When the relay fails, it does not send a signal to start the motor, and you only hear silence or short clicks.
The compressor itself is the heart of the refrigerator. If it is faulty, for example, an interturn short circuit or a jammed piston group, it will also not start. If jammed, the motor may try to make a hum, but immediately stall. However, if the winding is completely broken or the thermal protection inside the motor burns out, the unit will be absolutely silent. Motor diagnostics require a multimeter to test the windings.
How to check the starting relay yourself?
To check, you need to remove the relay from the compressor (after first disconnecting the refrigerator from the network). Shake it: if something rattles inside, it means the mechanical part is damaged and needs to be replaced. You can also test the contacts with a multimeter - the resistance should be close to zero or match the rating indicated on the case.
Replacing the start relay is a procedure that can be done with your own hands if you have basic skills in working with tools. It is important to buy a relay identical to the burnt one, since the parameters may differ for different Indesit models. Compressor It is extremely difficult to change it yourself: this requires evacuation of the system, charging with freon and a special tool.
Pay attention to the temperature of the compressor. If it is cold, it means there is no current flowing to it (the problem is in the relay, thermostat or circuit board). If the motor is hot, but does not work and does not hum, the internal thermal protection may have tripped or jammed. In the latter case, the “tapping” method sometimes helps, but this is a temporary measure before replacing the unit.
Problems with the thermostat and temperature sensors
Thermostat (or thermostat) is a device that commands the compressor to turn on when the temperature in the chamber rises above the set one. If thermostat it is faulty and its contacts are open, the motor power circuit does not close. As a result, the refrigerator “thinks” that there is cold inside and does not start the cooling cycle. You will not hear any operating sounds, since the system is simply in standby mode.
Modern Indesit models with a No Frost system or electronic control use temperature sensors (thermistors) instead of a mechanical thermostat. They transmit data to the main control module. If the sensor “lies” or shows that the chamber is too cold, the board will not give the command to turn on the compressor. Diagnostics of such systems is only possible using a tester that measures the resistance of the sensor at different temperatures.
⚠️ Attention: When replacing a thermostat or sensors, it is important to correctly install the sensitive part (capillary tube or sensor head) in its original place, otherwise the temperature regime will be disrupted.
To check a mechanical thermostat, you can close its contacts directly (for a short time!). If after this procedure the refrigerator hummed and started working, then the reason was precisely in the regulator. However, you cannot operate the unit with a jumper - it will work continuously, which will lead to freezing of products and overload of the motor. Replacing the thermostat will solve the problem permanently.
Often users themselves inadvertently unscrew the thermostat knob to the “0” or “Min” position, without realizing that this turns off the cold. Before disassembling the equipment, make sure that the regulator is set to the operating position. In electronic models, check whether the “Vacation” or “Eco” mode is activated, which can change the operating algorithms.
Failures in the electronic control module
Modern Indesit refrigerators are controlled electronically. If control module (the board) fails, it may not supply voltage to the compressor and fan. The reasons for board failure are varied: power surges, moisture, manufacturing defects, or simply worn-out elements. In this case, the refrigerator may light up with indicators, but remain silent and not cool.
Diagnostics of the board requires knowledge in electronics. Visually you can detect burnt tracks, swollen capacitors or traces of burning. However, often there are no external signs, and testing of the elements is required. If you are not qualified as a radio engineer, it is dangerous to get into the “brains” of the refrigerator - you can finish off working components.
Sometimes the problem is solved by “flashing” or resetting errors. To do this, the refrigerator is disconnected from the network for a long time (30-60 minutes). If after switching on the operating logic is restored, it means a software failure has occurred. If the module is physically burnt out, it will require replacement or complex repairs at a service center.
It is worth noting that in some Indesit models, if one of the sensors (for example, a defrost sensor) malfunctions, the module can block the start of the compressor in order to avoid an emergency. Therefore, checking electronics always goes in conjunction with checking peripheral sensors.
Mechanical reasons and the No Frost system
Although the question sounds like “you can’t hear how it works,” sometimes silence is a consequence of the fact that the equipment has already done its job and is paused. But if there is a lot of food, but there is no cold, it is worth checking the defrosting system. In refrigerators No Frost a fan is responsible for air circulation. If it is frozen or jammed, the cold does not enter the chamber, although the compressor may work (or not work if the sensors detect evaporator overcooling).
However, if you do not hear any sounds at all, including the hum of the fan (which is usually heard when the door is open on some models), this may indicate an open circuit in the power supply of the fan or its motor. In systems with one compressor and two chambers, solenoid valvesare responsible for the distribution of cold. If the valve does not open, the cold will not enter one of the chambers.
A common cause of “silence” is banal defrosting. If the evaporator is clogged with ice, the sensors may block the system. Try defrosting the refrigerator completely (leaving the doors open for a day). If after this it starts and works normally, then the problem was in the defrost system (heating element, timer, defrost sensor).
Mechanical damage to pipelines (freon leakage) usually does not lead to complete silence - the compressor continues to hum, trying to catch up with the temperature. But if there is no refrigerant at all, and the thermostat is mechanical, it may not turn on the engine because it does not feel the heat (if the thermostat tube is also empty). This is a rare but possible scenario.
Diagnostic table of symptoms
For the convenience of systematizing possible causes, we have compiled a table that will help compare symptoms with probable malfunctions. This will allow you to more accurately describe the problem to the technician or understand what part to look for in the store.
| Symptom | Probable cause | Necessary actions |
|---|---|---|
| Complete silence, there is light in the chamber | Malfunction of the thermostat, start relay or module | Checking the thermostat contacts, relay continuity |
| Silence, no light, other devices are working | Broken power cord, faulty socket | Checking the cable and voltage in the socket |
| Short click and silence | Starting attempt, burnt-out starting relay | Replacing the starting-protective relay |
| Lit indicators, but no cold | Failure of electronics, sensors or freon leak | Diagnostics of the module and checking the pressure in the system |
| The engine is hot, but does not start | The compressor is jammed or the winding is broken | Call a technician to replace the compressor |
When you need to call a technician
Despite the desire to save money, there are situations when self-repair is not only ineffective, but also dangerous. If the diagnostics showed that the problem is compressor (requires soldering of pipes, evacuation, refilling with freon), you cannot do without professional equipment. Attempts to “revive” the motor with a hammer or heat can lead to its final failure.
A technician is also needed if a refrigerant leak is detected. Freon is not just a gas, it is a substance that requires precise dosage and compliance with environmental standards. Finding a leak often requires the use of a leak detector and nitrogen under pressure. Specialist will be able to pinpoint where the fistula has formed and seal it.
If you are not confident in your abilities when working with live electricity, it is better not to take risks. An electric shock or short circuit may cost more than a service center. In addition, unqualified intervention often voids the warranty (if it is still valid) and can lead to a fire hazard.
☑️ Checklist before calling a technician
Prevention and proper care
In order for your Indesit to please you with quiet and efficient operation (or timely hum), you need to properly care for it. Regular defrosting (even for No Frost systems, at least once a year) helps prevent ice from building up on the evaporator, which reduces the load on the compressor. Keeping the condenser (grids at the back) clean is the key to good heat transfer.
Do not overload the refrigerator with food. If you put in too much warm food, the compressor will wear out, which will shorten its life. Try not to set the temperature control to maximum unless necessary. Optimal operating mode prolongs the life of all components of the unit.
Monitor the condition of the door seals. If they do not fit tightly, warm air enters the chamber, forcing the equipment to work more often. Wipe the seals with a soft cloth and check their integrity. Following these simple rules will help to avoid a situation where the refrigerator suddenly becomes silent.
What to do if the Indesit refrigerator turns on, but does not freeze?
If after silence the unit turns on, but there is no cold, there may be a freon leak or a blockage in the capillary tube. One of the heating circuits (in two-compressor models) could also burn out. Diagnostics by a specialist is required.
Is it possible to operate a refrigerator if it operates silently?
If the refrigerator is modern and inverter-powered, silent operation is the norm. If it is an old model that has always hummed, but now is silent and does not cool, it cannot be used, the food will spoil.
How long does the compressor on an Indesit refrigerator last on average?
The average service life of a compressor is 7-10 years under normal operating conditions. However, with frequent power surges or overheating (dirty capacitor), it may fail earlier.