The situation when Indesit refrigerator suddenly stops cooling the main chamber, while the freezer compartment continues to freeze food, causes bewilderment and anxiety. Many equipment owners encounter this problem and mistakenly believe that the entire unit has failed, whereas often the malfunction is local in nature. In most cases, the compressor hums regularly, creating cold, but for some reason this cold does not reach the upper shelves.
The reasons for such an imbalance may lie in both banal operating errors and serious technical breakdowns of the system No Frost or thermoregulation. Understanding the design of your model - whether it is a classic drip system or modern technology Total No Frost is the key to correct diagnosis. In this article, we will analyze in detail the mechanics of the process so that you can determine the nature of the breakdown and make an informed decision about repairs.
It is important not to panic and not to rush to call a technician before the initial inspection. Often the problem is solved by simply defrosting or reconfiguring operating modes. However, ignoring the symptoms can lead to food spoilage and more expensive equipment repairs in the future. Let's figure out why impaired circulation of the refrigerant or a failure in temperature control leads to such consequences.
The principle of operation and distribution of cold in Indesit
To understand where the failure occurred, it is necessary to imagine the basic diagram of the movement of cold in your unit. In most models, even if they are not equipped with a system, cold air is generated in the evaporator area, which is most often hidden behind the back wall of the freezer. This is where the main heat exchange occurs. Indesit, even if they are not equipped with a system No Frost, cold air is generated in the evaporator area, which is most often hidden behind the back wall of the freezer. This is where the main heat exchange occurs.
From the freezer, cooled air masses must enter the refrigeration compartment through special air ducts or through natural convection. If the freezer is working, then the compressor, freon and the evaporator itself are working. The problem lies in “logistics”: the cold is either not produced in sufficient volume, or is blocked on the way to the upper chamber.
In models with one compressor and one cooling circuit, the temperature is regulated by a common thermostat or electronic unit. If the sensor “thinks” that it is still warm in the freezer, it will drive the compressor all the way, freezing everything in the lower compartment, but due to icing of the channels, the upper chamber will remain warm. This is a classic temperature imbalance scenario.
⚠️ Attention: In two-chamber refrigerators with one compressor, malfunction of the air duct damper can lead to a complete stop of cold supply to the refrigerator compartment, even if the motor is running continuously.
There is also a difference in the behavior of the equipment depending on the type of defrosting. In drip systems (Drop System), moisture flows down the back wall, and if the drainage hole becomes clogged, an ice plug forms, interfering with heat transfer. In systems No Frost fans and defrost timers play a key role, which we will discuss below.
Self-diagnosis: first steps
Before disassembling the unit or looking for a service center, carry out basic diagnostics. Often, users do not notice obvious things, such as the position of the temperature control or how tightly the doors are closed. Your task is to eliminate the human factor and simple mechanical obstacles.
First of all, listen to the operation of the motor. If it hums constantly and does not turn off, and it is warm in the refrigerator compartment, this is a sure sign that the system is trying to compensate for the leakage of cold or cannot overcome the thermal load. If the motor is silent, but the freezer is cold, the protective mechanism may have worked or a power surge has occurred.
Check the tightness of the rubber seals. Even a small gap in the refrigerator door will result in a constant flow of warm, moist air. This causes increased frost formation on the evaporator, which blocks the air supply channels. As a result the refrigerator does not freeze from above, although everything is frozen from below.
It is also worth checking the temperature settings. In some electronic models, a program failure may have occurred and the unit went into the “Vacation” or “Super Freeze” mode, which changes the cold distribution algorithm. Resetting the settings to factory settings often helps restore normal operation.
☑️ Initial condition check
No Frost system problems and evaporator icing
The most common reason for the situation when Indesit it freezes only in the freezer is a malfunction of the automatic defrost. In units No Frost frost on the evaporator must be regularly melted by a heating element (heating element). If this process is disrupted, the evaporator becomes overgrown with a “fur coat” that tightly blocks the fan.
The fan drives air, but the ice cocoon does not allow the cold flow into the upper chamber. Visually it looks like this: the freezer is wearing out, the compressor does not turn off, and the temperature in the refrigerator compartment is rising. Often in such cases, you can hear how fan hums or crackles, trying to break through the ice.
The main culprits in the failure of the defrost system include:
- ❄️ Faulty defrost heating element —the heating element burns out and stops heating, which is why the ice does not melts.
- ⏱️ Burnt defrost timer —the device does not switch the refrigerator from cooling mode to defrosting mode.
- 🌡️ Faulty defrost sensor —it “tells” the control unit that there is no ice, although the evaporator is already covered crust.
Diagnostics of these elements requires opening the back panel of the freezer and using a multimeter to check the integrity of the circuits. If you do not have the skills to work with electrical appliances, it is better to entrust this procedure to a professional, as there is a risk of damaging the plastic case or wiring.
How to check the heating element with a multimeter?
To check the heating element, you need to disconnect the refrigerator from the network, get to the heater (usually it is located under the evaporator) and measure its resistance. The normal resistance value of a working heating element is from 200 to 600 Ohms. If the device shows infinity (open circuit) or zero (short circuit), the element requires replacement.
Malfunctions of the thermostat and temperature sensors
The thermostat (thermostat) is the “brain” that decides when to turn the compressor on and off. In older models Indesit with mechanical control, this is a simple capillary tube that is temperature sensitive. In modern digital models, this role is played by electronic sensors.
If the thermostat fails and is “stuck” in the “off” position, the compressor will not start and the cold will cease to be produced at all. However, another problem is more common: the thermostat “does not see” the temperature increase in the refrigerator compartment. He believes that it is still cold there and does not give the command to start the compressor, although the food is already defrosting.
In electronic systems, each compartment is often responsible for its own temperature sensor. If the refrigerator compartment sensor shows incorrect data (for example, too low), the control unit will keep the damper closed or not turn on the compressor, believing that the cold is sufficient. Replacing the sensor usually solves the problem, but requires precise calibration or selection of an analogue.
Symptoms of a malfunctioning thermostat often manifest themselves in incorrect operation of the indicator light or the absence of characteristic clicks when switching modes. In mechanical models, you can try to carefully turn the regulator knob from minimum to maximum - if there is no click, the mechanism is likely faulty.
Freon leakage and clogged capillary tube
More serious technical problems are associated with the refrigeration circuit. If in the system freon leaked, the pressure drops and the refrigerant simply does not reach the evaporator in full. In such cases, a paradox is often observed: the freezer still somehow freezes (since the evaporator is located there), but there is no longer enough cold to reach the fridge compartment.
If there is a freon leak, the compressor can work almost without stopping, trying to gain temperature, but to no avail. The condenser (the grill at the back of the refrigerator) will be cold or slightly warm only at the beginning, and not hot along its entire length, as it should be during normal operation.
Another possible reason is clogged capillary tube. Ice or technical blockages (oil or solder oxidation products) could have formed in the refrigerant circulation system. This prevents the normal flow of freon. The symptoms are similar to a leak: the compressor is humming, the condenser is only partially warm, and there is no cold in the chambers or it is distributed unevenly.
| Symptom | Probable cause | Nature of compressor operation | Condenser condition |
|---|---|---|---|
| The freezer is freezing, the top is warm | Defrost malfunction (No Frost) | Works constantly | Hot along the entire length |
| Both chambers are warm, the compressor is silent | Thermostat or start relay is broken | Won’t turn on | Cold |
| Weak cooling everywhere | Freon leak | Works without stopping | Barely warm or cold |
| Uneven cold, gurgling noise | Capillary tube clogged | Works with overload | Partially warm |
⚠️ Attention: Repairing the refrigeration circuit (filling with freon, soldering tubes, removing blockages) requires special equipment and a license. Independent attempts can lead to complete failure of the equipment.
When you need to call a technician and professional repairs
If simple methods like defrosting for 24 hours did not help, and diagnostics with a multimeter revealed an open circuit in the heating element or thermostat, you are faced with a choice: change the part yourself or call a specialist. Repairing the system No Frost often requires complete defrosting of the unit and careful disassembly, which is difficult to do at home without the risk of damaging the plastic.
It is especially important to contact professionals if a freon leak or a clogged system is suspected. This requires evacuation of the circuit, precise refilling of a certain type of refrigerant (R600a or R134a) and checking the tightness of the connections. An error in the amount of freon can quickly damage the compressor.
A master is also needed if the compressor itself fails compressor. Replacing a motor is a complex technical procedure that requires re-soldering copper tubes and setting the start-protection relay. In modern inverter models Indesit replacing the compressor often requires reflashing the control board, which is only possible in a service center.
Do not delay the repair. Prolonged operation of the compressor idling (due to a leak or blockage) leads to overheating and burnout of the windings. Then the price of a new compressor will be added to the cost of repairs, which can amount to up to 50% of the cost of a new refrigerator.
Prevention and operating rules
To prevent the problem “the freezer works, but the refrigerator doesn’t” from happening again, it is important to follow the operating rules. Regularly check the condition of the seals and clean them from grease and crumbs. A dirty seal does not provide a tight seal, which is the main reason for the formation of excess ice.
Do not overload the shelves with products and do not place hot food inside. Excess warm food creates enormous humidity that the defrost system may not be able to handle, especially in the summer. This leads to rapid fouling of the evaporator and blocking of the air channels.
At least once a year it is recommended to completely defrost the refrigerator (if not No Frostthen as necessary, but for No Frost as a preventative measure), even if it is working properly. This will help remove hidden ice jams in hard-to-reach places in the air circulation system.
What to do if the Indesit refrigerator still does not cool after defrosting?
If after 24 hours of defrosting the situation has not changed, then the problem is not in the ice jam. Most likely, one of the automation elements is faulty: defrost heating element, timer, thermostat or sensor. Freon leakage is also possible. It is necessary to test the circuits with a multimeter or call a technician for diagnostics.
Is it possible to temporarily use the refrigerator if the upper chamber does not work?
You can only use the equipment in this mode for a short time. Constant operation of the compressor without turning it off will lead to its overheating and breakdown. In addition, food in the refrigerator will quickly spoil. It is better to temporarily transfer perishable foods to the freezer (if there is space) or use a cooler bag until the technician arrives.
Why does ice freeze in the freezer, but it is warm in the refrigerator?
This is a classic sign of a violation of the defrosting system in models No Frost. Ice freezes on the evaporator, blocking the access of cold air to the upper chamber. In this case, it can be very cold in the freezer, since the source of cold is located right there, and it cannot go up due to ice jam.
How often do you need to change the thermostat in an Indesit refrigerator?
The thermostat does not have a scheduled replacement period and lasts until it breaks. Usually this is 5-10 years of operation. If you notice that the refrigerator starts to turn on more often, works longer or stops turning off, you should check the serviceability of the thermostat first.