The situation when the refrigerator does not hold the temperaturecan take any owner by surprise. The chamber gets warmer, food begins to spoil, and puddles of condensation appear on the shelves. The first reaction is often to panic and try to turn the regulator up to maximum, but this only makes the problem worse. Before calling a technician, it is necessary to carry out initial diagnostics, which often allows you to identify simple operating errors.
Many malfunctions associated with temperature violationare mechanical in nature or caused by improper installation of the unit. Temperature sensor may transmit incorrect readings if there is a hot object next to it, and seal doors often let heat in due to simple contamination. Understanding the operating principles of your model Indesit, Bosch or LG will help you quickly localize the heat source.
In this article we will look at the main reasons why fridge compartment it stopped cooling properly. You will learn how to check the operation thermostat, why it hums compressor, but does not cool, and in what cases urgent defrosting of the system is required No Frost. A competent approach to diagnostics will save budget and time.
⚠️ Attention: If you notice that the back wall of the chamber is covered with a thick “coat” of ice, but it is warm inside, immediately disconnect the device from networks. Operation in this mode can lead to jamming of the compressor piston group.
Primary diagnostics: external factors and settings
Before disassembling the unit or looking for a leak refrigerant, it is worth eliminating basic errors. Often the reason why the refrigerator has stopped freezinglies not in a breakdown, but in operating conditions. Check whether the device is located too close to a wall or radiator. For normal air circulation behind the rear grille condenser a gap of at least 5-7 cm is required.
Pay attention to the position regulator thermostat. If it is accidentally moved to the “0” or “Min” position, the compressor simply will not turn on. In models with electronic control Samsung or LG the operating mode could be lost due to a voltage surge in the network. In this case, a complete reset of the settings to factory values through the menu helps.
It’s also worth checking the tightness of the door. Rubber seal over time it dries out or becomes contaminated with grease, no longer sealing the chamber. Warm air constantly enters inside, and unit works for wear and tear, not having time to cool the products to the required values. Simply washing the seal with warm water and soap often solves the problem.
Problems with the defrosting system (No Frost)
In refrigerators with the system No Frost The most common cause of loss of cold is a malfunction of the defrost system. Ice builds up on the evaporator, which is hidden behind a plastic panel, and blocks the cold air supply channels. As a result fan it hums, but airflow (air flow) does not enter the chamber. Temperature it grows inside, although the compressor can operate continuously.
For diagnostics it is necessary to carry out a full defrosting the unit. Leave the refrigerator turned off with the doors open for at least 24 hours. This will allow the ice to completely melt and the water to drain. If, after turning on, the device starts to freeze normally again for 5-7 days, and then the problem repeats, it means that one of the elements of the defrosting system has failed: Evaporator heating element, sensor defrost or timer (control module).
☑️ Diagnostics of the No Frost system
It is important to check the drainage hole. If it is clogged with debris or ice, the melting water does not go into the pan, but freezes, forming an ice plug. This blocks work evaporator. You can clean the channel using a soft rubber bulb or a special brush, carefully introducing warm water.
⚠️ Attention: It is strictly forbidden to use sharp metal objects (knives, screwdrivers) to chip ice inside the chamber or on the evaporator. You can damage the tubes containing freonwhich will lead to expensive repairs and refilling.
Malfunctions of the thermostat and sensors
Thermoregulator (thermostat) is the “brain” that commands the compressor to turn on or off. In mechanical models, this is a device with a capillary tube that senses temperature. If the thermostat is faulty, it may “stick” in the “Off” position, and the refrigerator will simply stop cooling, or in the “On” position, causing continuous operation and deep freezing of food.
In modern models with electronic control (Bosch, Electrolux), the role of the thermostat perform temperature sensors (NTC thermistors). They are resistors whose resistance changes depending on heat. If the sensor fails, an error code may appear on the display, or the refrigerator will go into emergency operation mode, ignoring the user settings.
How to check the thermostat with a multimeter?
To check the mechanical thermostat, remove it and ring the contacts. At room temperature the circuit should be closed. If you put the thermostat in the freezer, after a while the circuit should break (you will hear a click). Lack of reaction indicates the need for replacement.">
To check a mechanical thermostat, remove it and ring the contacts. At room temperature, the circuit should be closed. If you put the thermostat in the freezer, after a while the circuit should break (a click will be heard). Lack of reaction indicates the need for replacement.
Replacement thermostat. data-i="129">regulator — procedure simple, but requiring precision. It is important to install a new element with the same markings as the old one, since different models have different capillary tube lengths and operating ranges. Incorrectly selected regulator will lead to incorrect operation of the entire unit.
Freon leakage and problems with the compressor
If after defrosting and checking the electrical system the refrigerator hums, but does not freezethere is a high probability of leakage refrigerant (freon), and if. a microcrack forms in the tubes (often due to corrosion or mechanical damage), the gas evaporates. Without a sufficient amount of refrigerant, heat is not removed from the chambers.
It is difficult to diagnose a leak visually. Indirect signs are: hot side walls (instead of barely warm), lack of characteristic gurgling during operation, as well as swelling of the inner wall of the freezer (in places where the tubes are sealed). In such cases, you need to call a technician with a leak detector and equipment for vacuuming and filling.
Another serious problem is a malfunction. compressorThis is. the “heart” of the refrigerator. If the motor-compressor hums, clicks, but does not start, or operates with severe overheating and vibration, the winding may be broken or the mechanism may be jammed. In some cases, installation helps. start relay, but often the compressor itself needs to be replaced.
The influence of the number of products and chamber loading
Paradoxically, both an empty and a crowded refrigerator can Poor temperature control. There is little “thermal mass” in an empty chamber, and each time the door is opened, cold air is quickly replaced by warm air. Thermostat does not have time to react, and the temperature jumps. It is recommended to store at least a minimum amount of food or containers with water in the chambers.
On the other hand, if you have loaded a large amount of warm food into the refrigerator that has just been turned on, unit it may work for days at its maximum, unable to cool the entire volume. This is not a breakdown, but an intensive freezing mode. Give the equipment time (up to 24 hours) to cope with the load.
It is also important to distribute the products correctly. Do not place pans close to the back wall if there is no system there No Frost. In refrigerators with a “crying” wall, contact with it can lead to food spoilage (freezing) or, conversely, disruption of air circulation if the products block the channels.
Comparative table of symptoms and causes
To quickly navigate the problem, use the table below. It will help to compare the observed symptoms with the most likely malfunctions.
| Symptom | Probable cause | Difficulty of repair | Necessary actions |
|---|---|---|---|
| It buzzes, but does not cold, no ice | Freon leak or clogged capillary | High (needs a technician) | Call a specialist to look for a leak |
| It’s warm in the chamber, ice on the back wall | Malfunction of the defrost system (No Frost) | Average | Defreeze for 24 hours, check the heating element and sensor |
| The compressor is silent, there is no light | No power or burnt out relay | Low | Check the socket and cord |
| The cooling is weak, the compressor runs constantly | Compressor wear or leakage | High | Check the pressure in the system |
| The temperature fluctuates, the food is thawing | The thermostat or sensor is faulty | Medium | Replacing the thermostat |
⚠️ Attention: If your refrigerator is under warranty, any independent intervention (removing seals, disassembling the compressor compartment) will lead to loss of the manufacturer's warranty. In such cases, limit yourself to external diagnostics.
Frequently asked questions (FAQ)
Why is the refrigerator freezing, but the temperature in the chamber is higher than normal (+10°C)?
Most likely, it is broken air circulation. Check that the ventilation openings are not blocked by food. The second reason is a malfunction thermostat, which “does not feel” real heat and turns off early compressor. It is also possible for warm air to leak through a leaky thermostat seal.
Is it possible to use a refrigerator if it does not hold the temperature?
For a short time - yes, if you watch the products. However, prolonged operation in the “underweight” mode (when the compressor does not turn off or operates intermittently) leads to overheating of the motor windings and its combustion. It is better to eliminate the cause or temporarily transfer the food.
The water in the refrigerator is frozen, but the food is warm - what is it?
This is a classic sign that thermostat is set to maximum, but due to a leak freon or problems with compressor the unit cannot gain total cooling power. Ice forms locally at the freon outlet, and there is not enough heat in the volume of the chamber.
How often do you need to defrost a No Frost refrigerator?
The system No Frost does not require regular defrosting to remove ice, as it does this automatically. However, once a year (or if an unpleasant odor appears), it is recommended to turn off the device for general cleaning, washing and processing seals.
Why did the refrigerator immediately stop cooling after defrosting?
If you defrosted it for less than 12-24 hours, ice is in the hidden channels evaporator may not have melted completely. When turned on, it froze again and cut off the air. The second option is that during defrosting you damaged the tube or wiring. The third one has failed defrost sensor, which now prevents the cooling cycle from starting.