The situation when the refrigerator Indesit buzzes without interruption is familiar to many owners of this equipment. It would seem that there is nothing wrong with constant work - the food will definitely not spoil, and there will always be icy cold inside. However, this behavior of the unit is a direct signal of a serious failure in the control system or a violation of the tightness of the circuit. Ignoring the problem in the first hours or days can lead to expensive repairs, including replacing the compressor.
Modern models, such as Indesit DF 416 or Indesit DS 320, are equipped with complex electronics, which must strictly control the cycles of turning the motor on and off. If this cycle is disrupted and the motor wears out, the temperature inside the chambers may, on the contrary, rise rather than fall. This is due to the fact that a “fur coat” builds up in the evaporator, blocking air circulation, or the refrigerant simply does not have time to cool in the condenser.
In this article we will analyze in detail the mechanical and electrical reasons for continuous operation. You will learn how to distinguish a banal overload of products from a breakdown thermostat or freon leak. Understanding these processes will help you make the right decision: call a technician or try to fix the problem yourself.
Malfunctions of the thermostat and temperature sensors
One of the most common reasons why the refrigerator Indesit does not turn off is failure thermostat. In older mechanically controlled models, this element is a simple switch that opens the circuit when the set temperature is reached. If its contacts “stick” in the closed position or the bellows tube with gas bursts, the compressor receives a command to work continuously. In more modern models with a system, electronic sensors perform the control function. Their readings are read by the control module, which makes the decision to start or stop the engine. If the temperature sensor in the refrigerator or freezer compartment transmits incorrect data (for example, it shows +10°C instead of the real -5°C), the “brains” of the refrigerator will drive the motor to the bitter end, trying to achieve a non-existent ideal.
In more modern models with the system No Frost or Total No Frost The control function is performed by electronic sensors. Their readings are read by the control module, which makes the decision to start or stop the engine. If the temperature sensor in the refrigerator or freezer compartment transmits incorrect data (for example, it shows +10°C instead of the real -5°C), the “brains” of the refrigerator will drive the engine to the bitter end, trying to achieve a non-existent ideal.
⚠️ Attention: When diagnosing a mechanical thermostat, never short-circuit the wires directly for a long time to check the compressor. This can lead to overheating of the motor windings if the protection system does not operate in time.Checking the thermostat in mechanical models, such as Indesit C 130 Goften requires its dismantling. It is necessary to remove the plastic regulator handle and protective cover. Inside you will see a device with several wires. For diagnostic purposes, it is often “shorted” and removed from the circuit. If after this the refrigerator begins to turn off (or stops turning on if it was faulty in the other direction), the problem has been found.
- 🔍 Symptoms of failure: The compressor hums constantly, the temperature in the chamber is below normal, a thick layer of ice forms on the back wall.
- 🔧 Test method: Visual inspection for corrosion of contacts, continuity testing with a multimeter in different positions of the handle.
- 💡 Nuance: In two-compressor models, only one thermostat can fail, so the second chamber will operate normally.
How to replace the thermostat yourself?
To replace, you need to completely defrost the refrigerator, remove the old regulator, carefully remove the sensitive tube from the evaporator (without damaging it!) and install a new spare part, observing the original length and bend of the tube.
Problems with the rubber seal and tightness
It would seem that What could be simpler than a rubber seal around the perimeter of the door? However, it is the violation of the seal of the chamber that causes the refrigerator Indesit to work without rest. If warm air from the room constantly enters the chamber, the internal temperature rises. Sensors detect warming and command the compressor to turn on. Since the heat flow is constant, the motor simply does not have time to cool the volume to the required values and go on a break.
Most often the problem lies in wear, contamination or mechanical damage. seal. Over time, rubber loses elasticity, cracks or deforms. Also, the door may not fit tightly due to skewed hinges, which often happens due to improper use or after transportation. In models Indesit EF 18 or Indesit IB 18 door skew is a common occurrence when the shelves on the door itself are overloaded.
To check the tightness there is a simple “paper test”. Take a regular sheet of A4 paper, clamp it with the refrigerator door around the perimeter and try to pull it out. If the sheet is pulled out too easily, without noticeable resistance, then there is no tight fit in this place. Walk this way along the entire contour, paying special attention to the corners and joints if you have a model with a French door.
☑️ Diagnosis of the seal
Done: 0 / 5If the seal is simply contaminated with fat or sticky food residues, it is sufficient Wash thoroughly with warm water and a mild detergent. If the rubber becomes stiff or torn, a replacement will be required.
Refrigerant leak and problems with the defrost system
The most unpleasant reason for the continuous operation of the refrigerator Indesit is a freon leak. The refrigerant circulates in a closed circuit, and if a microcrack forms somewhere (often in the foamed part of the housing or at the place where the tubes are welded), the gas gradually evaporates. The pressure in the system drops, and the compressor, trying to compensate for the lack of cooling capacity, works at its limit without stopping.
Signs of a leak are specific: the refrigerator hums around the clock, but the temperature inside either barely stays on the verge of freezing, or even rises. In this case, the condenser (grid at the back or side walls) may be barely warm or cold, although the motor is hot. In models with No Frost this may be supplemented by a failure of the defrost system, when the heating element does not turn on and the evaporator becomes overgrown with ice, blocking the airflow.
The table below shows the main differences between the symptoms of a freon leak and a thermostat malfunction, so that you can more accurately diagnose the problem:
Parameter Freon leak Thermostat malfunction Interior temperature Increased or unstable Reduced (freezing) Condenser heating Weak or absent Normal or strong Reaction to defrosting Operation time until next turn on short Can work cyclically after complete defrosting Sounds Hissing or gurgling may be heard No extraneous sounds ⚠️ Attention: Refill the refrigerator yourself freon is impossible without special equipment and skills. Trying to find a leak “by eye” is also dangerous, since some refrigerants are odorless and colorless.If the problem lies in the defrost system (for models No Frost), then ice blocks the air channels. The refrigerator “thinks” that the chamber is warm and does not turn off. You can check this by completely defrosting the unit (turn it off for 24 hours with the doors open). If after turning it on it works in normal mode (turns on and off), then the problem is in the defrost heating element, timer or defrost sensor.
📊 How long ago did your refrigerator start working without interruption?Less than a day2-3 daysMore than a weekI noticed only nowThe influence of external temperature and incorrect installation
Refrigerator Indesit, like any other equipment, is designed to work in a certain climate class. Typically this range is from +16°C to +32°C (class SN-T). If you install the unit in an unheated room where the temperature drops below +10°C, or, conversely, in the kitchen next to a hot stove, where the air temperature exceeds +35°C, the normal operating cycle is disrupted.
In a hot room, heat exchange in the condenser is difficult. Freon does not have time to cool down and turn into a liquid state. The pressure in the system increases, the compressor works with overload, trying to “push” the refrigerant, but the cooling efficiency decreases. The result is continuous operation and the risk of motor overheating. In a cold room (below +10°C), the oil in the compressor thickens, and the thermostat may simply “not see” the need to turn on, or, if there is a malfunction, on the contrary, not give a command to turn off due to temperature differences.
It is important to ensure proper air circulation around the housing. 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 niche or suite, ventilation according to the instructions is mandatory. Overheating of the compressor due to poor ventilation is a common reason why the refrigerator Indesit hums non-stop.
Also worth Check that the refrigerator is not in direct sunlight. Heating the case by the sun forces the cooling system to work more intensely, compensating for external heat inflow. In the summer, this can become a critical factor, especially for models with one cooling circuit.
Incorrect loading of products and frequent opening
The human factor is often underestimated. If you have just returned from the supermarket and loaded Indesit two dozen kilograms of food at room temperature into the refrigerator, the unit will work for a long time. This is fine. But if after the food has cooled (after 3-5 hours) the motor continues to hum, then there is a problem.
The other extreme is incorrect placement of the food. In refrigerators with a No Frost system, cold air circulates through special channels. If you pack the shelves full of food, block the vents, or press the food tightly against the back wall, circulation will be disrupted. A temperature sensor located in a specific location will not “feel” the cold, and the compressor will not receive a signal to stop.
- 🥩 Warm foods: Never put hot or warm food in the refrigerator. This is a huge stress for the compressor.
- 🚪 Open door: Check that the door closes tightly. Sometimes it gets in the way of a piece of packaging or a skewed shelf.
- 🌡️ Zoning: Do not block the air flow. There should be space between products for circulation.
Frequent opening of the door, especially in the hot season, also leads to prolonged operation of the motor. Every time you open a door, you let in warm, moist air. Moisture settles on the evaporator, turning into ice, which reduces the efficiency of heat transfer. If there are a lot of people in the house or there are small children who like to look into the refrigerator, you should not be surprised at the continuous operation of the equipment.
⚠️ Attention: If you notice that the refrigerator works without interruption immediately after loading a large amount of food, give it time (up to 12 hours). If during this time it does not return to mode, look for a malfunction.Wear of the compressor and start relay
The compressor is the “heart” of the refrigerator Indesit. Over time, its resource is depleted. Wear of the piston group, valves or windings leads to a drop in performance. The motor runs and hums, but does not create the required pressure in the system. For the controller, this looks like undercooling, and it does not give a shutdown command.
Another important element is the starting relay. This device is responsible for starting the engine and protecting it. If the relay is faulty (the contacts are burnt, the mechanism for disconnecting the starting winding is out of order), it may not open the starting winding circuit or incorrectly switch the operation of the motor. In some cases, this leads to the compressor humming but not starting, or starting and running continuously, becoming very hot.
Diagnostics of the compressor at home is limited. You can check the temperature of the case: if it is hot to such an extent that it is impossible to touch it (above 80-90°C), and the refrigerator is barely cold, most likely the compressor is “dying” or there is a leak in the system. It is also worth listening to the sound: a steady hum is the norm, but if you hear a metallic knock, clanging or sharp ringing, the compressor requires replacement.
Replacing a compressor is a complex and expensive process that requires evacuation of the system and refilling with freon. In older models Indesit (for example, series Indesit ER) it is often cheaper and more expedient to buy a new refrigerator than to change the “heart” of the old one.
Frequently asked questions (FAQ)
Why the new Indesit refrigerator does not turn off the first time day?
This is absolutely normal. After delivery and installation, the refrigerator takes time (from 6 to 24 hours) to cool the internal volume to the set temperature, especially if there was warm food inside or it was in a warm room. During this period, the compressor can work without interruption.
Can a refrigerator work without interruption in the summer?
Yes, in extreme heat (above +30°C in the room), the operating cycle can be significantly longer. However, the complete absence of pauses (shutdowns) even for 10-15 minutes for several days is a sign of overload or malfunction, even in summer.
What to do if the Indesit refrigerator hums, but does not freeze?
Most likely, there is a freon leak or the capillary tube is clogged. It is necessary to turn off the device from the network, defrost it for 24 hours and call a technician to find a leak and refill it.
How to understand that the thermostat has burned out?
If, when you turn the thermostat knob to the “0” or “Off” position, the compressor does not stop, but continues to hum, it means that the thermostat contacts are stuck or it is faulty. Another sign may be the formation of a “coat” of ice on the back wall while the motor is running.
Is it dangerous to leave the refrigerator running without interruption?
Yes, it is dangerous. This leads to overheating of the compressor, melting of the insulation, a fire hazard and rapid failure of expensive components. If such a malfunction is detected, it is better to stop operation until the reasons are clarified.