Equipment owners Indesit often face a situation when an excessive amount of ice or frost begins to form inside the chamber, especially on the rear inner wall. This phenomenon can be scary, as the ice crust gradually grows, occupying usable volume and making it difficult to access food. However, in most cases, such operation of the unit is due to physical processes or a failure in control algorithms, and not a fatal breakdown.
Modern models are often equipped with a system No Frostwhere freezing in the visible part of the chamber is generally impossible by design, but classic systems Direct Cool (crying evaporator) work precisely due to periodic cooling of the rear walls. If there is too much ice and it does not have time to drain into the drainage hole, you need to look for the cause in a violation of heat exchange or the tightness of the circuit.
In this article we will look in detail why The Indesit refrigerator freezes there is ice on the back wall, how to distinguish normal operation from a malfunction and what steps need to be taken to fix the problem without calling a technician. Understanding the principles of operation of the compressor and thermostat will help you save time and budget.
The principle of operation of the cooling system and the formation of condensate
To understand the nature of icing, you need to understand the basic physics of the process. The rear wall of the refrigerator compartment in models with a drip defrost system is an evaporator or contains channels with refrigerant. When the compressor turns on, the temperature of this surface drops sharply below zero. The moisture contained in the air of the chamber condenses on the cold surface and instantly turns into frost or ice.
In normal operation, when the compressor is turned off by a signal from the thermostat, the wall heats up. The ice melts, turning into water, which flows down the groove into the drainage hole and then into the evaporator located outside the housing. Cyclicity this process is the basis for normal operation. Problems begin when the cycle is disrupted: either the wall does not have time to thaw, or too much moisture enters.
⚠️ Attention: If the ice crust on the back wall has a loose, “fluffy” structure and covers the entire surface evenly, this often indicates that the refrigerator door remained open or loosely closed for a long time.
It is important to consider the moisture content of the food you are storing. Open pots of soup, wet vegetables, or simply opening the door frequently in hot weather will lead to a sharp increase in the humidity inside the chamber. The air does not have time to renew itself, and excess moisture settles on the coldest point - the back wall, forming massive ice build-ups.
High humidity and violation of operating rules
The most common reason why Indesit refrigerator ice becomes overgrown is a banal failure to comply with operating rules. The human factor plays a key role here. If you notice that ice appears mainly after loading a large amount of food or in the summer, you should reconsider your habits of using equipment.
Warm air that gets inside when the door is opened contains more moisture than cold air. Upon contact with the back wall, this vapor instantly crystallizes. If you put hot or warm dishes in the chamber, you artificially create a “steam room”, which causes the compressor to work hard and the wall to become covered with a thick layer of ice.
- ❄️ Check the tightness of the door: if the seal (elastic) is dirty or damaged, warm air is constantly sucked in.
- ❄️ Do not store food without packaging: vegetables and fruits “breathe” and release moisture, which settles on the walls.
- ❄️ Watch the frequency of opening: holding the door open for a long time disrupts the temperature balance.
It is also worth paying attention to the location of the refrigerator. If it is too close to the kitchen wall or next to a heat source (battery, stove), heat exchange is disrupted. The compressor is forced to work longer to maintain the set temperature, which leads to deeper freezing of the back wall and the formation of ice.
Malfunctions of the thermostat and temperature sensors
If the operating mode is ideal, but Indesit refrigerator it still freezes at the back, the problem lies in the “brains” or sensory organs of the unit. The key element here is the thermostat (or electronic temperature sensor in modern models). Its task is to monitor the temperature inside the chamber and give a command to the compressor to turn on or off.
If the thermostat breaks down or its settings are shifted, the unit may “not understand” that it is already cold enough inside. The compressor continues to work without stopping, freezing the entire contents and turning the back wall into a solid piece of ice. In such cases, you can often hear that the refrigerator is humming continuously, without pausing to rest.
In models with electronic control, the evaporator temperature sensor is responsible for control. If it fails or shows incorrect data (for example, it lowers the actual temperature), the control unit will keep the compressor on. Freezing is a direct symptom of such a malfunction.
| Symptom | Possible cause | Nature of ice |
|---|---|---|
| The refrigerator does not turn off | The thermostat is faulty | Thick, hard crust all over the wall |
| The food in the chamber is frozen | Temperature sensor failure | Frost on food and walls |
| Ice in only one corner | Circulation problem or leakage | Uneven, lumpy |
| The ice melts and freezes again | The drainage is clogged | Ice plug at the bottom |
Diagnostics of the thermostat at home is possible, but requires caution. Temporarily lowering the temperature setting or forcing a defrost for 24 hours often helps. If after turning on the problem repeats after a short time, most likely you will need replacement of the thermostat.
How to check the thermostat with a multimeter?
To check a mechanical thermostat, you need to remove it and “ring” the contacts in cold and warm states. In heat the circuit should be closed, in cold it should be open. However, an accurate test is only possible in a chamber with a known temperature.
Problems with the door seal
The tightness of the chamber is the key to stable operation. If sealing rubber band on the refrigerator door Indesit is worn out, cracked or simply contaminated with grease, it no longer fits tightly to the body. Through the resulting cracks, warm, moist air from the kitchen constantly flows inside.
This process is invisible to the eye, but its consequences are immediately visible: a “fur coat” is formed on the back wall. In contrast to the short-term opening of the door, constant air leakage leads to the continuous formation of condensation, which does not have time to flow into the drainage and freezes in layers.
You can check the tightness with a simple test with a sheet of paper. Press the door around the perimeter of the sheet and try to pull it out. If the paper is pulled out without resistance in some place, it means that the pressure there is broken. Also visually inspect the rubber for cracks, creases or detachments from the body.
- 🧼 Wash the seal thoroughly with warm water and soap to remove the grease film.
- 🔥 If the rubber is deformed, try gently warming it with a hairdryer (without overheating!) so that it straightened out.
- 🔧 Check the door hinges: if they are skewed, the door will not fit tightly even with the seal intact.
Users often forget that even a small crumb or object stuck in the fold of the seal can break the seal. Careful inspection and cleaning of this unit often solves the problem of freezing without the need for repair.
Clogged drain hole
One of the most common technical reasons why Indesit refrigerator ice accumulates at the bottom of the back wall or in the form of icicles is clogging of the drainage system. The water generated during defrosting of the evaporator must flow freely through a special hole into the pan above the compressor.
Over time, debris, crumbs, mold or fatty deposits accumulate in this hole. A plug is formed that prevents the water from leaving. Water accumulates in the gutter, freezes, and with each cycle this ice ball grows, blocking the drain even more. As a result, the water overflows over the edge of the groove and freezes on the shelf or bottom of the chamber.
You don’t need to be a master to fix this problem. It is enough to carry out preventive cleaning. You will need soft wire (preferably copper or a special brush) and warm water. Carefully push the wire into the hole, clearing the channel, and then pour some warm water into it to make sure it drains freely.
☑️ Cleaning the drain
⚠️ Attention: When cleaning the drainage, do not use sharp metal objects (knives, spokes) so as not to damage the channel walls or evaporator tubes hidden behind the plastic. A puncture of the evaporator will lead to a freon leak and expensive repairs.
Refrigerant leakage and compressor malfunction
The most serious cause of abnormal freezing is a freon leak or a malfunction of the compressor. When there is not enough refrigerant in the system, the compressor tries to compensate for the lack of cold by working continuously and at its maximum capacity. In such cases, ice can cover not only the back wall, but also partially the freezer chamber or even go beyond the evaporator.
When freon leaks, an uneven distribution of ice is often observed: for example, an ice crust can be only in one corner of the back wall or have a specific “tongue” shape. This is due to the fact that the mixture of refrigerant and oil does not circulate correctly, and the boiling point shifts.
It is difficult to diagnose a leak on your own, but there are indirect signs: the refrigerator runs almost non-stop, food in the main chamber may spoil due to insufficient cooling (if the leak is severe), and traces of oil or rust are visible in places on the back wall or evaporator rations.
In this case do-it-yourself repair impossible. You need to call a specialist who will find the leak using a leak detector, seal the system and fill the refrigerator with new freon. Operating a unit with a leak is not only ineffective, but also harmful to the compressor, which can burn out from overheating.
Frequently asked questions and answers (FAQ)
Is it normal for ice to form on the back wall of the Indesit refrigerator?
For models with manual defrosting or a “crying wall” system (Direct Cool), the formation of a thin layer of frost or small ice crusts during operation compressor is absolutely normal. The ice should melt when the compressor turns off. You should sound the alarm if the layer of ice becomes thick (more than 5 mm), does not melt or interferes with closing the shelves.
How often should you defrost an Indesit refrigerator?
Even if the instructions state the No Frost system, preventive defrosting is recommended 1-2 times a year. For models with a “crying” wall, defrosting is required as ice forms, but at least once every 6 months. This helps maintain hygiene and work efficiency.
Why does ice form only in the lower part of the back wall?
Most often, this indicates that the drainage hole located in this area is frozen or clogged. The water does not go away, accumulates and freezes. The second reason is incorrect installation: if the refrigerator is tilted forward, the water does not drain into the drain, but flows out or freezes below.
Is it possible to scrape ice with a knife?
It is strictly forbidden. Mechanical removal of ice with sharp objects can lead to breakdown of the evaporator tubes, which often run close to the inner wall of the chamber. A freon leak due to one careless movement will require expensive repairs. Use only the natural defrosting method.
What to do if the refrigerator stops defrosting automatically?
In No Frost models, the defrost timer, evaporator heating element or defrost sensor is responsible for this. If you see that the unit does not go into defrost mode (the fan is blowing, but there is a lot of ice), you need to check these elements. In Direct Cool models, make sure that the thermostat is working properly and is not “stuck” in the “on” position.