The situation when refrigerator compartment stops maintaining the required temperature, while the freezer continues to work in normal mode is a classic malfunction for equipment Indesit with the system No Frost. Users often experience that food in the upper compartment spoils, while everything below freezes. This indicates a violation of the circulation of cold air or problems with heat removal, and not a complete stop of the compressor.
In most cases, the breakdown lies in the evaporator defrost system, which ceases to function correctly. The snow “coat” freezes on the radiator, blocking the air flow, and the cold simply does not reach the upper chamber. Understanding the design of your model Indesit will help you quickly diagnose the problem without immediately resorting to calling a technician.
Modern units are equipped with complex electronics that control operating cycles. If you notice that the indicators are flashing or an alarm is sounding, this may be a reaction control module to the failure of one of the sensors. Ignoring the first symptoms can lead to more expensive repairs, including replacing the compressor.
The principle of operation of the No Frost system in Indesit refrigerators
To understand why Indesit refrigerator it does not cool in the upper compartment, you need to understand the physics of the process. Unlike the drip system, forced air circulation is used here. The fan drives air masses through the evaporator located in the freezer, cools them and directs them into the refrigeration compartment through special channels.
The key element is the evaporator, which is constantly covered with frost during operation. To prevent the formation of an ice block blocking the ventilation, the system automatically starts a defrost cycle. At this moment it turns on Defrost heating element, melting the ice. If this cycle is disrupted, the channels become clogged with ice, and cold air physically cannot enter the upper chamber.
It is important to note that the compressor can work continuously, trying to catch up with the temperature, but due to the ice plug, the cooling efficiency drops to zero. That is why the freezer, where the source of cold is located, continues to freeze, and the main compartment turns into a warehouse for warm products.
Technical features of circulation
In No Frost systems, air moves in a closed loop. Air ducts clogged with ice is the most common reason for lack of cold from above. Checking the patency of the channels requires complete defrosting of the unit for at least 24 hours.
Malfunctions of the evaporator defrost system
The most likely reason that Indesit stopped cooling the upper chamber is the failure of one of the elements of the defrost circuit. The system consists of a heating element, a defrost thermostat (or sensor) and a timer (or electronic module). If any of these components fails, the ice stops melting and accumulates.
Most often it burns out itself The defrost heating element. This is a tubular heater that wears out over time. You can check its integrity with a multimeter in continuity mode: if the device shows an open circuit, the element requires replacement. Also, the defrost sensor often fails, which should send a signal to turn on the heating at a certain temperature.
Another reason may be a malfunction defrost timer or a fuse. In modern models Indesit timer functions are often performed by an electronic control module, which can “glitch” due to voltage surges. In this case, the system simply “forgets” to start the defrost mode.
☑️ Diagnostics of the defrost system
Symptoms of a defrost system malfunction usually appear gradually. First, the refrigerator begins to work longer, then extraneous sounds of breaking ice appear, and only then the temperature in the refrigerator compartment begins to rise. If you do not react in time, ice can damage the fan blades.
Problems with the fan and clogged air ducts
The movement of cold in the system No Frost is provided by the fan. If this unit stops working, the air circulation stops and the cold remains in the freezer without entering the upper compartment. The fan may jam due to icing or the electrical part of the motor may fail.
A situation often occurs when the fan blades freeze to the housing or to ice on the evaporator. In this case, you may hear a characteristic crackling or buzzing sound when starting up. The motor tries to turn over, but the ice prevents it from doing so. Over time, the motor winding may burn out, and then the fan will stop completely.
Clogged air ducts are another common reason. Even if the fan is working properly, ice chips or food may block the air supply. In models Indesit the inlets are often located on the rear wall of the refrigerator compartment. They must be kept clean.
- ❄️ Fan jammed: The blades rest against ice, complete defrosting is required.
- 🔌 Open motor circuit: The fan does not start, the unit needs to be replaced.
- 🧊 Ice plug in the channel: Air does not pass through the blocked hole.
Refrigerant leakage and problems with the compressor
Although less common, there are situations when the problem lies in the tightness of the system or the operation of the compressor. If there is freon leakin the system, the pressure is not enough to effectively cool the entire volume. In such cases, the freezer, as a smaller volume, can still maintain a low temperature, and the refrigerator compartment becomes warm.
It is difficult to determine a leak visually, since freon is colorless and odorless. An indirect sign may be that the compressor works almost non-stop, trying to compensate for the lack of refrigerant, but the desired effect is not achieved. The side walls of the refrigerator may also heat unevenly.
Problems with the compressor, such as reduced valve performance or wear of the piston group, also lead to similar symptoms. In this case, the unit hums, but does not cool properly. Repair in the event of a leak or breakdown of the compressor requires special equipment and qualified technicians.
⚠️ Attention: Self-filling the refrigerator with freon is prohibited and dangerous. Finding leaks and evacuating the system requires professional equipment. Trying to repair it yourself can lead to complete failure of the compressor.
It is important to distinguish between the symptoms: if the compressor turns on for a short time and turns off, clicking the relay, this may indicate a start-up relay or problems with the motor itself. If it hums constantly, most likely there is a leak or blockage of the capillary tube.
Malfunctions of the thermostat and temperature sensors
Temperature control in Indesit is carried out using a thermostat (in mechanical models) or electronic sensors (in models with display). If the thermostat is “stuck” in the “Off” position or gives incorrect readings, the compressor will not turn on often enough to maintain cold in the upper compartment.
In electronic models, temperature sensors (NTC thermistors) are responsible for monitoring. One sensor can monitor the temperature in the refrigerator compartment, the other in the freezer. If the upper chamber sensor gives an error or shows a temperature higher than the actual one, the control module may not issue a cooling command.
Sensors often require calibration or replacement. Over time, their resistance changes and the readings become incorrect. In models with a display, this problem is usually reported by an error code that can be deciphered in the instructions.
| Component | Function | Malfunction symptom | Check method |
|---|---|---|---|
| Thermoregulator | On/Off compressor | The refrigerator does not turn on or off | Contact dialing |
| Air sensor | T° control in the chamber | Incorrect readings on the display | Resistance measurement |
| Evaporator sensor | Defrost control | Ice build-up, no defrost | Test at different temperatures |
The procedure for detecting a malfunction
If you encounter a problem when The refrigerator is not cooling, the action algorithm must be sequential. The first and simplest thing you can do is to completely defrost the unit. Unplug the appliance, remove all food and leave the doors open for at least 24 hours. This will help eliminate ice jams in the air ducts.
After defrosting, turn on the refrigerator and listen to the fan operation. If after a few hours the temperature in the upper compartment begins to drop, then the problem was in the defrost system or icing of the channels. If the situation repeats after a week or two, you will need to replace the elements of the defrost system (heating element, sensor).
If defrosting did not help, you need to check the operation of the thermostat and sensors. For mechanical models, you can try gently turning the control knob until you hear a click. For electronic ones, diagnostics with a multimeter will be required.
⚠️ Attention: Technical characteristics and location of parts may vary depending on the specific series Indesit. Before disassembling, make sure that you have read the technical documentation specifically for your model, since the design may change.
Frequent questions and answers (FAQ)
Why did the refrigerator work after defrosting, but after a week it stopped cooling again?
This is a classic sign of a malfunction of the automatic defrosting system. Most likely, the evaporator heating element or defrost sensor has burned out. Ice accumulated again and blocked the channels. Replacement of faulty elements is required.
Is it possible to operate the refrigerator if the freezer is working and it is warm in the refrigerator compartment?
For a short time - yes, but not recommended. The compressor works with increased load, trying to cool the volume, which can lead to overheating and failure. In addition, the food in the upper chamber will spoil.
How can you tell that the fan has burned out and not just a clogged duct?
When you turn on the refrigerator, listen to the noise in the freezer. If the fan is completely silent, the motor may have burned out or there is no power. If you hear a cracking sound, the blades are touching the ice. In both cases, diagnostics are needed.
How much does it cost to repair the No Frost system at the service?
The cost depends on the region and the specific breakdown. Replacing a heating element or sensor is usually cheaper than repairing a compressor or finding a freon leak. The exact price can only be found out after diagnostics by a technician on site.