The situation when instead of fresh food is found in the refrigerator compartment ice crust or completely frozen vegetables are familiar to many owners of household appliances. This is not just an inconvenience that requires constant defrosting of the shelves, but also a signal about serious failure the operation of the unit. If the refrigerator freezes in the refrigerator compartment, it means that the temperature balance is disturbed, for which a complex refrigerant control and circulation system is usually responsible. Ignoring this problem can lead to product damage, compressor failure and expensive repairs.
The first thing to do when an anomaly is detected is to conduct a visual inspection and eliminate the simplest operating errors. Often the reason lies not in a breakdown, but in incorrect settings of the thermostat or violation of the rules for loading chambers. However, if simple measures do not help, it is necessary to delve deeper into the diagnosis of technical components. In this article we will analyze the main reasons why Atlant refrigerator, Indesit or any other brand begins to “freeze” the upper chamber, and how to restore normal operation.
It is important to understand that modern models, especially systems No Frostare more complex than old single-compressor ones units. In them, the temperature is regulated by mixing cold air from the freezer and warm air from the refrigerator. If this process is disrupted, the cold flow flows uncontrollably. Let's take a step-by-step look at what exactly could have happened to your equipment.
Checking settings and operating modes
Before you grab the tools, you need to make sure that you have not accidentally activated extreme operating modes. Many modern models are equipped with a “Super Freeze” or “Super Freeze” function, which forces the compressor to work at its maximum capacity, freezing everything that enters the chamber. If you turned on this function to quickly freeze meat and forgot to turn it off, hypercooling guaranteed. Check the control panel: the snowflake indicator or the Super sign should only be on temporarily.
The second critical parameter is the position of the temperature regulator. In mechanical models, this is a rotary knob with numbers from 1 to 7, where 7 is the maximum cold. If the knob is set to maximum and the room is hot, the refrigerator will work non-stop, trying to achieve an unattainable ideal, and freeze the food. In electronic models with a display, temperature +3...+5 °Cis considered optimal. If the value is set below +2 °C, food at the back wall will begin to freeze.
⚠️ Attention: Do not confuse the “Super Freeze” mode in the freezer with enhanced cooling in the refrigerator compartment. In some models, activating the powerful mode in the freezer can indirectly affect the overall temperature background if the control system is not isolated.
It is also worth paying attention to the location of the products. If you press the shelves tightly against the back wall, you have blocked the cold air outlet (in No Frost systems) or created a localized area of hypothermia at the evaporator (in drip systems). Air should circulate freely inside the chamber. If food is placed close to the back wall, they freeze to it, creating the illusion that the refrigerator is “killing” all living things.
Malfunctions of the thermostat and temperature sensors
If the settings are normal, but the refrigerator continues to freeze, most likely the (thermostat) or electronic temperature sensor has failed. In older mechanically controlled models, the thermostat is a device with a bellows that responds to changes in temperature inside the chamber. When it gets too cold, the bellows contracts and opens the contacts, shutting off the compressor. If this mechanism is “stuck” in the closed position, the compressor will thresh without stopping, turning the refrigerator compartment into a freezer. thermostat (thermostat) or electronic temperature sensor. In older mechanically controlled models, the thermostat is a device with a bellows that responds to changes in temperature inside the chamber. When it gets too cold, the bellows contracts and opens the contacts, shutting off the compressor. If this mechanism is “stuck” in the closed position, the compressor will thresh without stopping, turning the refrigerator compartment into a freezer.
In modern units with a system Full No Frost and electronic control, the role of a mechanical thermostat is performed by air sensors. They are small thermal resistances that transmit data to the control module. If the sensor “lies” and tells the controller that the chamber is +10 °C, although in fact it is already -5 °C, the “brains” of the refrigerator will command the compressor to continue working. Replacing such an element requires disassembling the internal panel.
Diagnostics of the thermostat in mechanical models is often carried out by the method of exclusion or dialing with a tester. To do this you need:
- ❄️ Disconnect the refrigerator from the network and remove the regulator knob.
- ❄️ Dismantle the plastic cover and remove the thermostat.
- ❄️ Check the contacts in a warm state (should be closed) and when cooling (should open).
Symptoms of sensor malfunction in electronic models are often accompanied by error codes on the display. For example, this may be a code Samsung this could be the code 12C or 39C, and this may be a flashing temperature indicator. However, the error is not always displayed explicitly. If the refrigerator is freezing, but there are no errors, the sensor may simply produce an error sufficient to cause the mode to fail. LG — flashing temperature indicator. However, the error is not always displayed explicitly. If the refrigerator freezes, but there are no errors, the sensor may simply produce an error sufficient to cause the mode to fail.
☑️ Diagnostics of sensors
Problems with the damper and the No Frost system
In refrigerators with a system No Frost cold is generated in a separate evaporator, usually located in the freezer compartment or behind the rear wall of the refrigerator compartment. From there, cold air is forced by a fan into the fridge compartment through a special channel. The amount of incoming cold is regulated by an air damper (damper). If the damper is stuck in the open position or the drive of its mechanism is broken, a continuous flow of icy air from the freezer will flow into the refrigerator compartment.
The damper can be mechanical (thermostatic) or electric. Mechanical works by expanding the gas in the bellows when the temperature changes. Electrical is controlled by a module. In both cases, the result is the same: if it breaks, the damper remains open. You can hear the characteristic noise of air blowing from the holes on the back wall of the refrigerator compartment, even when the compressor seems to be resting.
Another problem with the No Frost system is freezing of the air ducts. If the evaporator defrost system (heating element, timer, defrost sensor) does not work correctly, a coat of ice builds up on the evaporator. This coat can partially block the channels, but more often it leads to pieces of ice breaking off and jamming the valve open. As a result, the fan drives ice chips directly onto the food.
⚠️ Attention: If you find that very strong and cold air is blowing from the holes on the back wall of the refrigerator, and the products at the back wall are covered with frost, there is a 90% chance that the damper or its system is faulty controls.
To check the damper in models with electronics, entering the service mode is often required. For example, in some models Bosch or Siemens you can force open or close the damper through button combinations to check its progress. Mechanical dampers are checked visually: the decorative panel is removed, and the mobility of the damper is manually assessed.
Is it possible to drive with the damper open?
You cannot drive, but you can operate the refrigerator with the damper open if you are prepared for everything to freeze in the refrigerator compartment. However, the compressor will work hard, trying to cool the already cold chamber (the cycle will be short), which will lead to its rapid failure.
Freon leakage and compressor malfunctions
Paradoxically, sometimes the refrigerator freezes too much due to a lack of refrigerant. This is typical for two-compressor models or systems with one compressor and one circuit, where control is carried out by redistributing flows. If it happened freon leak, the compressor may run longer than usual as it tries to raise the temperature in the freezer. Because the cold is distributed unevenly, one part of the system (often at the beginning of the circuit or in the refrigeration compartment if there is an evaporator) may experience local hypothermia while the rest of the system is not operating.
However, a more common leak situation is insufficient cooling. But there is a nuance: if a leak occurs in the refrigeration chamber circuit (in models where the evaporator is built into the wall), and the freezer is still cold, the thermostat (often located in the refrigeration chamber) does not see the required temperature and does not turn off the compressor. The freezer freezes, and in the refrigerator compartment there can be either warmth, or, under certain circulation conditions, cold air from the freezer can compensate for the lack of its own cold, but with a temperature imbalance.
If you have an old refrigerator with one evaporator in the freezer and natural circulation, and it began to freeze the refrigerator compartment “to stone,” this may indicate a violation of thermal insulation or a change in properties refrigerant (for example, due to poor quality repairs, the wrong gas was charged). But most often, if there is a leak, the refrigerator simply stops freezing completely.
Diagnostics of a leak includes:
- 🔍 Visual inspection of the tubes for oily stains (freon flows out along with the oil).
- 🔍 Checking the pressure in the manometric system station.
- 🔍 Listening to the operation of the compressor (if there is a lack of freon, it can run “idle” or overheat).
Table: Comparison of symptoms and causes
To make it easier for you to navigate the variety of possible breakdowns, we have compiled a comparative table. It will help narrow down the search for a fault before calling a technician.
| Symptom | Probable cause | Difficulty of repair | Necessary actions |
|---|---|---|---|
| Food frozen at the rear walls | Incorrect loading, high thermostat setting | Low | Move the food away, turn down the cold |
| Ice all over the chamber, the compressor does not turn off | Thermostat or sensor is faulty | Medium | Replacing the thermostat/sensor |
| Strong flow of cold air from the holes | The air damper is stuck | Average | Revision or replacement of the damper |
| Frost in only one corner or on the ceiling | Circulation is disrupted, the channel is frozen | High | Defrost (24h+), check the defrost system |
| The refrigerator is freezing, but the compressor is hot | Freon leak, capillary clogged | High | Call a technician, leak detection, refueling |
When you need to call a specialist
There are a number of situations when self-repair is not only ineffective, but also dangerous. If you checked the settings, defrosted the unit for a day, checked the thermostat, but the problem remained, it’s probably a “closed loop” issue. Filling with freon, replacing the filter-drier, soldering tubes require special equipment (vacuum pump, burner, pressure gauges) and licenses for working with gases.
It is also worth contacting professionals if:
- 🛠️ You hear extraneous sounds (gurgling, whistling) during operation compressor.
- 🛠️ The condenser (rear grille) is only partially cold or warm when the engine is running.
- 🛠️ The electronic control module makes clicking sounds, but does not start the systems, or fault indicators are on and do not reset.
Remember, that intervention in the refrigerant circulation system without experience often leads to repeated breakdowns after a short period of time. The technician will be able to accurately determine where the leak occurred and solder the connection efficiently.
Prevention and proper care
To prevent the question “why is the refrigerator freezing in the refrigerator compartment” from regularly arising in front of you, it is important to follow simple operating rules. Check the rubber seals on the doors regularly. If they do not fit tightly, warm, moist air enters the chamber. The cooling system begins to work harder, trying to compensate for the heat, which can lead to the formation of excess ice and temperature failure.
Remember to perform a complete defrost at least once a year (for drip systems) or as needed. Even in No Frost systems, over time, dirt and mucus accumulate in hard-to-reach places in the drainage system, which disrupts water drainage and can lead to freezing of the channels. Keeping the drainage hole clean is the key to proper air circulation.
Also keep an eye on the ventilation around the case. If the refrigerator is placed close to a wall or furniture, it will overheat. Overheating of the compressor and condenser leads to incorrect operation of the control system, which can “go into overdrive”, starting to freeze more than usual in an attempt to compensate for poor heat transfer.
☑️ Annual maintenance of the refrigerator
Can incorrect voltage in the network cause freezing?
Yes, voltage surges can damage the electronic control board. If the module is “buggy”, it can send incorrect commands to the compressor or damper, causing them to work in extreme mode. In regions with unstable electricity, it is recommended to use a stabilizer.
Why do vegetables freeze in boxes, but milk on the shelf is normal?
Cold air is heavier than warm air, so it sinks down. If the thermostat is located at the top or is not set correctly, there may be an overcooling zone at the bottom. Vegetables also contain a lot of water and freeze faster. Try raising the temperature by 1 degree.
Does the amount of food in the refrigerator affect the temperature?
Yes, a full refrigerator works more stable, since the food accumulates cold. An empty refrigerator reacts faster to opening the door and temperature fluctuations, which can provoke frequent starts of the compressor and local freezing at the walls.
What to do if, after defrosting, the refrigerator starts to freeze again?
If complete defrosting (at least 24 hours with the doors open) did not help, then the problem is not in the ice plug, but in faulty component: sensor, damper or thermostat. Diagnostics and replacement of spare parts are required.