The situation when the refrigerator Indesit with the system No Frost continues to glow with indicators, but stops freezing food, causing panic in any home cook. Unlike drip systems, where water accumulates on the back wall, here the disruption of air circulation may not be obvious at first glance. The compressor may hum, creating the illusion of normal operation, but the temperature in the freezer compartment will rise, threatening the safety of supplies.
The main problem lies in the disruption of the refrigeration cycle or failures in the heat removal system. The equipment of the Italian brand, assembled at various factories, often encounters typical No Frost malfunctions: from a banal clogged capillary to failure of the electronics. It is important to understand that self-diagnosis requires care, since the symptoms of different breakdowns can be surprisingly similar.
Before calling a technician, it is worth analyzing the nature of the unit’s operation. Does the motor hum constantly or intermittently? Has ice appeared on the back wall inside the chamber? Answering these questions will help you narrow down your troubleshooting. In this article we will analyze in detail the mechanical and electrical causes of freezer failure.
Symptoms of complete or partial loss of cold
The first sign of trouble is a change in the consistency of the food. The ice cream loses its shape and the meat becomes soft, although the thermometer inside the chamber may still show acceptable values. This happens because air circulation is broken and the cold flow does not reach the upper shelves or corners of the chamber.
Often owners notice that the compressor works without interruption, trying to compensate for the lack of cold. In other cases, on the contrary, the motor is silent, although the power light is on. If you hear clicking sounds when you try to start or the hum stops abruptly, this indicates problems with the starting mechanism or the compressor itself. Visual inspection also provides important clues. The presence of a “coat” of ice in one corner or, conversely, complete dryness of the evaporator while the fan is running indicate different types of malfunctions. The system compressor.
Visual inspection also provides important clues. The presence of a “coat” of ice in one corner or, conversely, complete dryness of the evaporator while the fan is running indicate different types of malfunctions. System No Frost requires an ideal balance between the operation of the defrost heater and the temperature sensors.
⚠️ Attention: If you notice swelling in the top or bottom panel of the refrigerator case, stop using it immediately. This is a sure sign of a refrigerant leak and moisture entering the thermal insulation layer, which requires complex factory repairs.
Do not ignore extraneous sounds. Whistling, hissing or gurgling may indicate that freon passes through a narrowed hole or its quantity in the system is critically small.
Refrigerant leak and capillary system blockage
One of the most common The reason why the freezer Indesit stops freezing is a refrigerant leak. Gas can escape through microcracks in the evaporator, which are formed due to corrosion or mechanical damage during inaccurate defrosting. Even a small loss of pressure leads to the compressor pushing the residual gas in a circle, but there is not enough cold.
The second option is clogged capillary tube. Oil circulates in the system, which over time can thicken or mix with breakdown products, forming a plug. As a result, freon does not enter the evaporator of the freezer, and cooling stops. In this case, the compressor can work very hot, trying to push through this plug.
Diagnostics of a leak at home is difficult, as it requires special equipment. However, there are indirect signs:
- 🧊 (the condenser) on the back wall remains cold or warm only partially, although the compressor is working.
- ❄️ There is no uniform layer of frost on the evaporator inside the chamber or it appears only at the tube inlet.
- 🔇 The compressor runs longer than usual or does not turn off at all.
To fix this problem, you will need to call a technician who will perform a nitrogen test, find the leak and fill the system with new with freon. Adding gas yourself without eliminating the cause is pointless - it will go away again.
Why can’t you just add freon?
Adding refrigerant without looking for a leak is a temporary measure. A mixture of old and new gas may have unpredictable properties, and the presence of air in the system will lead to rapid failure of the compressor.
Malfunctions of the defrost system (Defrost)
The system No Frost implies automatic defrosting of the evaporator. If this process is disrupted, the evaporator becomes overgrown with ice, which blocks the operation of the fan. The air stops circulating through the chamber and the temperature begins to rise. In the refrigerator Indesit the defrost heating element, defrost sensor and timer (or electronic module) are responsible for this process.
Most often the heater itself burns out. You can check its integrity with a multimeter by ringing the contacts. If the resistance is infinite, the element is faulty. The defrost sensor, which is supposed to inform the control module about the evaporator temperature, also often fails. If it “lies”, the command to turn on the heating is not received. Heating element heater. You can check its integrity with a multimeter by ringing the contacts. If the resistance is infinite, the element is faulty. The defrost sensor, which is supposed to inform the control module about the evaporator temperature, also often fails. If he is lying, the command to turn on the heating is not received.
Symptoms of a faulty defrost system:
- 🌬️ The fan is humming, but air does not blow from the holes in the chamber or blows barely.
- 🧊 On the back wall inside the freezer you can see a thick layer of ice or freezing in the form of icicles.
- 🔄 The refrigerator freezes normally only after complete manual defrosting (for 10-12 hours), and then the problem returns after a few days.
It is important to note that in some models Indesit a fuse is used, which can also blow out during a power surge, breaking the power supply circuit of the heating element.
☑️ Diagnostics of the defrost system
Problems with the fan and air circulation
Heart system No Frost is a fan that drives cold air from the evaporator into the chamber. If it stops, the cold remains outside the usable volume. A fan may stop working for several reasons: freezing of the bushing, failure of the electric motor, or lack of power. Indesit may stop working for several reasons: freezing of the bushing, failure of the electric motor or lack of power.
It often happens that the defrosting system does not work correctly and ice freezes around the fan blades. The motor tries to start, a humming or crackling noise is heard, but the blades are blocked. Over time, this leads to burnout of the motor winding. It is also possible that the contacts in the connection connector may oxidize.
To check the fan, you need to:
- 🔍 Get to the evaporator by removing the plastic panel in the freezer.
- 🖐️ Manually turn the blades (with the power off) - they should rotate freely.
- ⚡ Apply power to the fan separately to make sure it is working.
If the fan is working, but does not spin when the refrigerator is on, the problem may be in the sensor that controls the operation of the fan, or in the control board. In some models, the fan does not turn on if the door is open, which is a normal protective function.
⚠️ Attention: When working with the fan, make sure that the wires are not pinched by the plastic elements of the case. Vibration during operation of the refrigerator can grind the insulation, which will lead to a short circuit.
Failures in the operation of the thermostat and electronics
In modern models Indesit with electronic control, the control module and temperature sensors are responsible for the temperature. If the electronic "brain" receives incorrect data about the temperature in the chamber, it may not turn on the compressor. Mechanical thermostats (with a knob) also tend to wear out, losing sensitivity or sticking in the “Off” position.
The temperature sensor (thermistor) changes its resistance depending on the heat. If it shows the module that it is -30°C in the chamber, although it is already +5°C, the refrigerator “thinks” that there is no need to freeze. Replacing a sensor is an inexpensive procedure, but requires precision in selecting an analogue.
Table electronics malfunctions:
| Component | Symptom | Probability |
|---|---|---|
| Thermoregulator | The refrigerator is not turns on or does not turn off | High |
| Control module | Chaotic operation, errors on the display | Medium |
| Temperature sensor | Incorrect temperature mode | High |
| Start relay | Clicks, no compressor start | Medium |
Electronics diagnostics often requires replacing the element with a known good one. If after replacing the sensor the situation does not change, it is worth checking the wiring for breaks or oxidation of contacts in low temperature zones.
Wear of the compressor and start relay
The compressor is the engine of the refrigerator. If it doesn't start, the freezer won't work. A common cause is malfunction start relay. This is a small part that fits onto the compressor contacts. Inside it there is a coil or a posistor that can burn out. Symptoms: a loud click when turned on, a hum for a few seconds and shutdown.
A more serious problem is an interturn short circuit in the compressor winding or mechanical wear of the piston group. In this case, the motor may hum, but not create the necessary pressure. You can check the compressor by measuring the resistance of the windings with a multimeter. If the resistance tends to zero or infinity, the compressor is faulty.
It is also worth paying attention to the operation of the capacitor (if it is in the starting circuit) and the integrity of the wires going to the motor. Overheating of the compressor can be caused not only by its breakdown, but also by contamination of the condenser at the back of the refrigerator, which disrupts heat transfer.
Operation rules and prevention
In order for the freezer Indesit to serve for a long time, it is important to follow the operating rules. Do not place hot products in the chamber - this causes excessive steam formation and rapid fouling of the evaporator with ice, which the system No Frost may not be able to cope with. Also, do not overcrowd the chamber, leave gaps for air circulation.
Regular defrosting of the refrigerator (even the No Frost system) at least once a year helps remove ice accumulated in hard-to-reach places and refresh the system. Wipe the door seals - if they do not fit tightly, warm, moist air enters the chamber, which increases the load on the compressor.
Basic care recommendations:
- 🧹 Once every six months, vacuum or wash the condenser (grid) on the back wall.
- 🚪 Check the tightness of the door with a sheet of paper (it should be clamped around the entire perimeter).
- 🌡️ Do not install the refrigerator close to the wall, maintain a gap for ventilation.
⚠️ Attention: The characteristics and location of components may vary depending on the specific model and year of manufacture. Before starting work, check the technical documentation or official diagrams for your series Indesit.
Following these simple rules will avoid premature failure of expensive components. If the problem has already arisen, competent diagnostics will help you save on repairs.
Frequently asked questions (FAQ)
Why does the Indesit freezer not freeze, but the compressor works?
Most likely, there is a freon leak or the capillary tube is clogged. The compressor circulates gas, but there is no refrigerant circulation in the system. The blower fan may also fail.
How long should defrosting last to restore operation?
For complete thawing of ice in the No Frost system, especially if the channels are clogged, it takes from 12 to 24 hours. The minimum shutdown time is 10 hours.
Is it possible to replace the compressor on Indesit yourself?
Theoretically it is possible, but this requires a tool for soldering copper tubes, a vacuum pump for pumping out the system and scales for refilling freon. Without experience, there is a high risk of ruining the new compressor.
What does it mean if the back wall of the freezer is covered with ice?
This is a sign of a malfunction of the defrost system. The heating element, defrost sensor or timer does not work. Ice blocks the fan, and the cold stops flowing into the chamber.
Why does the Indesit refrigerator click and not turn on?
Clicks are usually made by the start relay, trying to start the compressor. If the click is not followed by a humming sound from the motor, the relay may have burned out, the compressor has jammed, or the thermal protection has tripped.