The situation when Indesit refrigerator works without turning off is familiar to many owners of household appliances. The constant hum of the compressor not only irritates the ear, but also signals serious malfunctions in the cooling system. If the unit stops turning off, this means that it cannot reach the set temperature or the sensors transmit incorrect data to the controller.
Ignoring the problem will lead to the motor-compressor burning out, and defrosted products will have to be thrown away. Modern Indesit models equipped with electronics that may block startup in the event of critical errors, but old mechanical systems will wear out to the last. In this material we will analyze the main causes of the malfunction.
You need to carefully listen to the operation of the unit and check several key components. Often the reason lies not in complex electronics, but in a banal freon leak or stuck contacts. If the compressor is hot to the touch, but does not start or works continuously, immediately disconnect the device from the network to avoid fire.
Malfunctions of the thermostat and temperature sensors
One of the most common reasons why the refrigerator does not turn offis the failure of the thermostat. This component is responsible for monitoring the temperature inside the chambers and sending a signal to turn off the compressor. If the contacts inside the thermostat are stuck in the closed position, the motor will receive current constantly. In models with electronic control, sensors are responsible for this, which can give erroneous readings.
In mechanical systems, such as Indesit C 130 or Indesit DF 418, the thermostat is a simple design with a bellows. If it breaks, it does not physically open the circuit. Electronic control modules are more complex: they read the resistance of the sensor. If the sensor “deceives” the module, reporting that the chamber is +10°C instead of the required +4°C, the system will continuously produce cold.
⚠️ Attention: An attempt to replace the thermostat yourself requires precise adjustment. Installing the wrong model or incorrect calibration will result in the products either freezing or starting to deteriorate.
Diagnostics of this unit often requires testing the contacts with a multimeter. In electronic boards, the resistance of sensors is checked at different temperatures. If the values deviate greatly from the norm, replacing the element solves the problem of endless operation.
Refrigerant leakage and problems with tightness
If the compressor works without stoppingbut there is no cold in the chambers or there is not enough of it, there is a high probability of a freon leak. The refrigerant circulates in a closed circuit, and if the seal is broken, its quantity decreases. The compressor tries to compensate for the lack of pressure and works in an enhanced mode, trying to achieve target temperatures.
Leaks can occur in various places in the system:
- 😟 Mechanical damage to the evaporator (often due to inaccurate defrosting with a knife).
- 😟 Corrosion of the metal circuit built into the walls of the case (especially in models Indesit previous years).
- 😟 Depressurization of soldering joints of tubes or connections to the compressor.
- 😟 Damage to the foam circuit during transportation or vibration.
It is difficult to independently detect a microcrack. Often a problem is indicated by swelling of the side walls or the appearance of oily spots in the compressor area. If the refrigerator hums, but does not freeze properly, and the condenser (grid at the back) remains only partially cold or warm, this is a sure sign of a lack of gas.
| Symptom | Probable cause | Necessary actions |
|---|---|---|
| Humming, cold no | Complete freon leak | Call a technician, search for leaks, refill |
| Humming, slight cold | Partial leak | Pressure diagnostics, soldering, refueling |
| Humming, very cold | Thermostat is faulty | Replacing the thermostat or sensor |
| Humming, hot side | Clogged capillary tube | Cleaning the system, replacing the filter |
Clogged capillary tube and filter-drier
Another technical reason why Indesit refrigerator can work without shutting down is a clogged capillary tube or filter-drier. Ice plugs may form in the freon circulation system or oxidation products and moisture may accumulate. This prevents the normal flow of refrigerant.
The compressor begins to pump freon "to nowhere", creating excess pressure before the blockage and a vacuum after it. Cooling efficiency drops, sensors record high temperatures and do not give a command to stop. A characteristic sign of a blockage is a hot compressor and a cold condenser (or its heating only at the beginning).
To eliminate this problem, professional cleaning of the system with nitrogen under pressure and replacement is required filter drier. Simply “blowing out” the tube is not enough, since moisture can remain in hard-to-reach places and freeze again after a while.
Failure of the control module and start relay
In modern models Indesit with the No Frost system and electronic control, a single module is responsible for all processes. If the tracks on the control board burn out, the contacts oxidize, or the compressor control triac fails, the shutdown signal may simply not be received. The motor continues to operate, ignoring the sensor readings.
It is also worth paying attention to the start-up relay. If its contacts burn out and weld together, the compressor’s power supply circuit does not break even when the bimetallic plate cools. In this case, the refrigerator will work until the motor winding burns out or the circuit breaker in the power supply is knocked out.
⚠️ Attention: Repairing an electronic board requires deep knowledge of circuitry. Unprofessional soldering can lead to a short circuit and complete failure of the refrigerator.
Diagnostics of the module is carried out by visual inspection for burning, swollen capacitors and continuity of output circuits. Often repairs involve replacing burnt elements or the entire board.
The influence of external factors and improper operation
Before sounding the alarm and looking for complex breakdowns, it is worth excluding trivial causes. The refrigerator does not turn offif the operating conditions are violated. For example, if the unit is standing next to a radiator, stove, or in direct sunlight, the cooling system does not have time to release heat.
The condition of the rubber seals on the doors is also critically important. If the rubber is dry, dirty or the door is warped, warm air constantly flows inside. The compressor is forced to work 24/7 to compensate for the heat gain.
Check the following points:
- ❄️ Whether the doors close tightly (test with a sheet of paper).
- ❄️ Is the refrigerator loaded with hot food.
- ❄️ Is there a gap between the back wall and the furniture for ventilation.
- ❄️ Is the temperature set to the minimum value (maximum cold).
☑️ Checking the operating conditions
Often, simply defrosting the refrigerator during the day helps eliminate the problem, if the cause was an ice coat on the evaporator blocking the sensor. After complete defrosting and drying, the unit can operate normally.
Diagnostics and procedure in case of breakdown
If you are faced with the fact that Indesit buzzes without interruption, follow the algorithm. First, exclude external factors and check the tightness of the doors. If visually normal, listen to the sounds of operation: a smooth hum or intermittent with clicks.
If a leak or blockage is suspected, further operation is useless and even harmful to the compressor. It works at its maximum capacity and can burn out in a few days. In case of problems with electronics or thermostat, the situation is a little less critical, but also requires intervention.
Is it possible to temporarily use the refrigerator in this mode?
For a short time (a few hours) - yes, while you are waiting for the technician. But you can’t leave it running for days without a break: the oil in the compressor loses its properties, overheating of the windings occurs and there is a risk of fire.
For accurate diagnostics, a pressure gauge station is often required to check the pressure in the system, and a tester to check the electrical circuits. Without special equipment, you can only assume the cause, but not eliminate it.
Frequently asked questions (FAQ)
Why does the Indesit refrigerator hum but does not freeze?
Most likely, a freon leak has occurred or a blockage has formed in the capillary system. The compressor is running, but the refrigerant is not circulating or there is not enough refrigerant for cooling. A call to a technician is required to find leaks and refill.
How long should the compressor operate normally?
In normal mode, the operating cycle is approximately 15-20 minutes, followed by a pause of 30-40 minutes. The working time ratio is usually 0.4 (40% of the time working, 60% resting). If the refrigerator works for 2 hours without a break, this is an emergency mode.
Can the refrigerator not turn off due to the heat in the room?
Yes, if the room temperature is higher than +30...+32°C, it is more difficult for the refrigerator to give off heat. The compressor operating time will increase and pauses will be reduced. However, it should turn off completely. If there are no pauses at all, look for a malfunction.
What to do if after defrosting the refrigerator does not turn off again?
If complete defrosting (24 hours with the doors open) did not help, then the problem is technical: the thermostat, sensor is faulty, there is a freon leak or a blockage. This will not go away on its own; repairs are necessary.
Is it dangerous to leave a refrigerator running without interruption?
Yes, it is dangerous. The compressor overheats, which can lead to insulation melting, short circuit and fire. In addition, the motor will quickly fail due to lack of lubrication and overload.