The situation when the refrigerator suddenly stops cooling food always takes you by surprise. The interior of the chamber may remain warm, or the temperature may rise only slightly, but this is not enough to preserve the food. The first thing you need to understand is the scale of the problem: the entire unit has failed or the operating mode of only one of the cameras has been disrupted.
Before calling a technician or panicking, you should carry out an initial diagnosis yourself. Often the reason lies in trivial things, such as a door that is not tightly closed or the thermostat settings are off. However, if you hear that compressor works continuously without shutdowns, but there is no cold, or the motor is silent, then the matter may be more serious.
In this article we will analyze in detail the algorithm of actions that will help identify the malfunction. You will learn how to check the main components of the unit and understand whether it is urgent refrigerator repair or the problem can be fixed on your own in a few minutes.
⚠️ Attention: If you smell burning conductivity or see sparking in the back of the unit, immediately disconnect the appliance from the power supply and do not try to turn it on again before the specialist arrives.
Checking the temperature conditions and the tightness of the door
The most common reason why the refrigerator does not freeze is that the seal of the chamber is broken. If warm air from the room constantly enters the system, the cooling element simply does not have time to compensate for the heat inflow. Visually inspect sealing rubber along the entire perimeter of the door. There should be no cracks, creases or dirt that would interfere with a tight fit.
Users often forget to check the thermostat settings. Accidentally moving the wheel or pressing buttons on the control panel could put the device into defrost or minimum cooling mode. Make sure the temperature is set correctly. For the main chamber, the optimal value is around +4°C, and for the freezer - -18°C.
- 🔍 Do a test with a sheet of paper: hold the sheet with the door and try to pull it out. If it pulls out too easily in different places, the seal is broken.
- 🧹 Clean the rubber seal from crumbs and grease using a mild soap solution, then wipe dry.
- 🌡️ Check whether the refrigerator is too close to the wall or radiator, which interferes with normal circulation air.
Sometimes the problem lies in overcrowding of shelves. If products lie close to the back wall, they may block the cold air supply channels. Circulation The inside of the chamber should be free. Leave a gap between the food and the back panel of at least a few centimeters.
Diagnostics of the operation of the compressor and start relay
If everything is in order with the tightness, attention turns to the “heart” of the refrigerator - the compressor. Listen to see if the motor makes a humming sound. If the unit is completely silent, the problem may be a lack of power supply or a burned out start relay. In some models, you can hear a characteristic click, followed by silence - this is a sure sign that the motor is trying to start, but cannot.
Overheating is also a common reason for stopping. Check the temperature of the motor housing. If it is so hot that it cannot be touched, the thermal protection has tripped. In this case, you need to let the refrigerator cool completely, unplugging it from the mains for several hours.
For a deeper check, you will need a multimeter. With its help, you can ring the motor windings for breaks or short circuits. Normal winding resistance varies from 10 to 30 Ohms, the exact values depend on the engine model.
How to safely test the relay?
To check the relay, you need to remove it from the compressor and shake it. If you hear a ringing inside (like a broken light bulb), it means that the posistor or mechanical switch is damaged and requires replacement.
You should not ignore the condition of the capacitor. This is the black grill on the back of the refrigerator. If it is hot, but there is no cold, heat exchange may be impaired. If the condenser is cold when the engine is running, this may indicate a lack of refrigerant in the system.
Freon leakage and problems with the No Frost system
In modern models with the system No Frost the lack of cold is often associated with a malfunction of the fan or defrost heater. If the evaporator is covered with a thick layer of ice (“a fur coat”), air simply cannot circulate through the chamber. The fan either does not turn on, or its blades are blocked by ice.
Refrigerant (freon) leakage is a more complex problem. Freon is odorless and colorless, so it is impossible to detect it visually. Indirect signs of a leak are: poor cooling, compressor operation without interruption and lack of heating of the condenser array. You can sometimes notice oily stains on the tubes at the leak site.
| Symptom | Probable cause | Necessary actions |
|---|---|---|
| The engine hums, but does not start | The starter is faulty relay | Replacing the relay |
| The refrigerator runs non-stop | Freon leak or compressor wear | Call a technician to find a leak |
| No Frost is frozen in the chamber ice | The defrost heating element or sensor has burned out | Defective defrost system |
| A whistle or squeak is heard | Fan malfunction | Lubricate or replace the fan |
If you notice that the freezer is working, and the refrigerator compartment is warm, and at the same time you have a two-compressor model, then one of the circuits may have failed. In single-circuit systems, this often indicates a blockage capillary tube or a critical lack of gas.
⚠️ Attention: Self-filling the refrigerator with freon is prohibited without special equipment and a license. An attempt to refuel “by eye” will lead to compressor failure.
Clogged capillary tube and filter drier
There is a bottleneck in the refrigerant circulation system - the capillary tube. Over time, plugs from oil or moisture oxidation products may form in it. This phenomenon is called clogging. In this case, the compressor works with increased load, trying to push gas, but circulation does not occur.
The blockage can be diagnosed by the temperature of the filter-drier (copper cylinder at the entrance to the capillary tube). Normally it should be warm. If the filter is cold or covered with frost, and the condenser is barely warm, then the freon current is blocked. An unnaturally hot compressor housing may also be a sign.
- 🔨 Lightly tapping the filter sometimes helps to move the plug, but this is a temporary measure.
- ❄️ Defrosting the refrigerator for 24 hours can dissolve the ice plug if the cause is frozen moisture.
- 🛠️ Complete removal of the blockage requires purging the system with nitrogen and replacing the filter-drier.
It is important to understand that ignoring this problem leads to overheating and jamming of the motor. If, after defrosting, the situation repeats after a few days, it means that there is moisture or mechanical particles left in the system.
☑️ Diagnostics before calling a technician
Faults of the electronic control module
In electronically controlled refrigerators, it is responsible for all processes control module. Power surges in the network often cause failure of board elements. If the display does not light up, blinks or shows an error (for example, Er 01 or F5), the problem is most likely in the “brains” of the device.
Sometimes the module simply “freezes” due to a power surge. In this case, a full reset (reboot) helps. It is necessary to unplug the plug from the socket for 10-15 minutes, and then turn it on again. If the error disappears and the cold appears, you are in luck. If the error code returns, the board needs to be replaced or flashed.
Inspect the board visually (after getting to it first). Swollen capacitors, blackened tracks or traces of burning will indicate a burnt element. Repairing a module is often cheaper than buying a new one, but requires the qualifications of a radio engineer.
When an urgent call to a technician is necessary
There are situations when self-repair is not only useless, but also dangerous. If you determine that the problem is in the sealed circuit (leak, blockage) or the compressor itself has burned out, you cannot do without a specialist. To work with freon, you need a vacuum pump, a pressure gauge station and scales for accurate filling.
It is also worth contacting service if the inverter compressor is faulty. These motors are sensitive to any disturbances in the power circuit and require a special tester for diagnosis. An attempt to “revive” them using artisanal methods will lead to final breakdown.
Do not forget about the warranty. If your refrigerator is less than 3-5 years old (depending on the brand and the law), any DIY repair will disqualify you from free service. It is strictly not recommended to open seals during the warranty period.
⚠️ Attention: Prices for spare parts and services of specialists may vary depending on the region and exchange rates. Before starting work, check the current cost of parts with official suppliers or service centers.
Prevention and proper care of the refrigerator
To prevent the question “why the refrigerator is not freezing” from suddenly arising in front of you, it is necessary to regularly service the equipment. Prevention extends the life of the unit by 5-7 years or more. The main rule is to prevent the formation of a thick ice crust in models without No Frost.
Regularly wash the condenser grille at the back of the refrigerator to remove dust. Dust acts as a heat insulator, preventing the freon from cooling, which causes the compressor to wear out. It is enough to vacuum the back wall once every six months.
- 🧼 Once a year, lubricate the door hinges so that they do not warp and break the seal.
- 🌡️ Do not place hot pots inside the chamber - this creates an extra load on the system.
- ⚖️ Monitor the level of the refrigerator: it should stand strictly horizontally or with a slight tilt back.
Following these simple rules will avoid costly repairs. Remember that (prevention) is always cheaper than eliminating the consequences of a breakdown.
How often do you need to defrost the refrigerator?
Models with manual defrosting require shutdown at least once every 3-4 months, when the ice layer reaches 5 mm. No Frost systems do not require defrosting, but a preventive shutdown once a year for washing will not hurt.
Why does the refrigerator hum but not freeze?
This is a classic sign of a freon leak or a clogged capillary system. The compressor tries to pump gas, but due to lack of pressure or obstruction in the pipes, cooling does not occur. A specialist diagnosis is required.
Is it possible to operate the refrigerator if it does not freeze well?
For a short time - yes, if you have moved the food to another place. But prolonged operation in this mode will lead to overheating of the compressor and its combustion. It is better to turn off the device until the reasons are determined.
What to do if the refrigerator does not turn on after defrosting?
The thermal protection relay may have tripped. Let it sit unplugged for another 2-3 hours. If startup does not occur after this, check the outlet and power cord. If this does not help, the problem is in the starting relay or compressor.
How can you tell that the compressor has burned out?
Signs: the motor does not make any sounds (complete silence), while the light in the chamber is on. Or the motor hums for a few seconds, clicks and goes silent. Testing the windings with a multimeter will show an open or short circuit.
Does the temperature in the room affect the operation of the refrigerator?
Yes, significantly. If the room is colder than +10°C (for example, on an unheated balcony), the oil in the compressor thickens and it may not start. If it is hotter than +35°C, the system does not have time to release heat, and efficiency drops.