The situation when the refrigerator has stopped freezingalways takes you by surprise, because the safety of products depends on it. You open the door, and it’s no longer cold there, or, on the contrary, everything has turned into an ice ball. At this moment, it is important not to panic, but to consistently check the main systems of the unit in order to understand the scale of the problem. Often the cause is trivial things that can be fixed in a few minutes without calling a technician.
However, in some cases, failure to operate indicates serious malfunctions internal components. The compressor may hum but not start, or it may run endlessly without cooling the chamber. Understanding the principles of operation of the equipment and the main symptoms of a breakdown will help you make the right decision: try to fix the device yourself or contact a service center.
In this article we will look in detail at why a refrigerator stopped freezing, and what steps need to be taken first. We will consider both simple cases associated with improper operation and complex technical breakdowns that require professional intervention.
Primary diagnostics: external factors and settings
Before looking for complex breakdowns, it is worth eliminating basic errors. Very often, equipment is working properly, but does not work correctly due to incorrect settings or external conditions. For example, if you have just defrosted your refrigerator or moved it, it needs time to stabilize at temperature. It is also worth checking whether the door fits tightly to the body, since even a small gap breaks the seal.
Pay attention to the position of the temperature regulator. In a hurry or while cleaning, someone in the household could accidentally move the handle to the “0” or “Off” position. If the indicator is on but there is no cold, check the settings in the electronic menu. For mechanical models, make sure that the handle is not at the minimum setting, which is especially important in winter in unheated rooms.
An important factor is the distance from the back of the device to the wall or furniture. If the refrigerator is standing closely, the radiator cannot effectively transfer heat. Air circulation it is broken, and the compressor, working to wear out, can no longer cope with the load. Move the unit at least 10 cm from the wall.
⚠️ Attention: If you have recently moved the refrigerator, do not plug it in immediately. The oil in the compressor must drain into the crankcase, otherwise water hammer and failure of the unit is possible. Wait 2–4 hours.
Also check the integrity of the rubber seal on the door. If it is contaminated with grease or has cracks, cold air will escape and warm air will flow inside. Wipe the seal with a soft cloth and soapy water. If the rubber band has come off, try to restore its shape using a hairdryer or hot water.
Problems with defrosting and the No Frost system
If your refrigerator is equipped with a system No Frost, then the most common reason for the lack of cold is a malfunction of the automatic defrosting system. In such models, the evaporator is located behind the rear wall of the chamber, and frost constantly builds up on it. The heating element should be turned on periodically and the ice should thaw. If this process is disrupted, the ice “coat” grows and blocks the cold air supply channels.
As a result, the fan hums, but the air simply does not pass through the ice jam. The chamber does not cool, although the compressor is running. This problem can be identified by a thick layer of ice on the back wall or in the evaporator niche (if you remove the plastic panel). Often the culprit is a burnt out defrosting heating element or failed timer.
- 🔥 The heating element (heating element), which is supposed to melt the ice, is faulty.
- ⏱ The defrosting timer or electronic module is broken controls.
- 🌡 The defrost sensor does not work, not giving a command to turn on the heating.
- 💨 The drainage hole is clogged, and the water does not drain, freezing below.
Diagnostics often require full defrosting the refrigerator during the day. If after switching on the equipment worked normally, but after a week it stopped freezing again, the problem is definitely in the defrosting system. In this case, you will need to replace the burnt elements.
How to check the defrost heating element with a multimeter?
To check, you need to remove the back panel in the freezer, find the heating element (usually this is a curved tube under the evaporator) and “ring” its contacts. If there is no resistance (break), the element must be replaced. Be careful: before checking, be sure to disconnect the device from the network!
Faults of the compressor and start relay
The compressor is the “heart” of the refrigerator, creating pressure for the circulation of the refrigerant. If it is silent or makes strange sounds (humming, clicking, but does not start), the problem may be with the start relay or the motor itself. The starting relay is responsible for starting the engine. When it breaks down, the compressor tries to start, clicks and stalls, the thermal protection is triggered.
Sometimes the compressor runs endlessly without turning off, but there is no cold. This may indicate a loss of piston group performance or a freon leak. If the motor-compressor is hot and the refrigerator is warm, this is a bad sign. In modern inverter models, diagnostics are more complicated and require special equipment to read error codes.
Check the voltage in the network. If it fluctuates greatly or is below normal, the compressor may not start. Using a surge protector or stabilizer can solve the problem in houses with old wiring.
☑️ Compressor diagnostics
If you hear a loud click, followed by a hum that lasts a few seconds, and then a click again, this is a classic symptom of a faulty start-up relay. Replacing it is a relatively simple procedure, accessible to a home craftsman with a minimal set of tools. However, if the replaced relay does not help, most likely the compressor itself has burned out.
Freon leakage and clogged capillary system
The refrigerant (freon) circulates in a closed circuit, transferring heat from the chambers to the outside. If a microcrack has formed in the system, the gas gradually evaporates. Symptoms of a leak: the compressor runs constantly or with short pauses, the condenser (grid at the back) is only partially warm or completely cold, and the temperature in the chambers is higher than normal.
Another common problem is clogging of the capillary tube. An ice or mud blockage may have formed in the system, preventing the circulation of freon. In this case, the compressor may work overload, trying to pump the refrigerant. It is difficult to determine a blockage by ear; professional purging of the system is often required.
In both cases, independent repair is impossible without special equipment: a vacuum pump, a pressure gauge station and a supply of freon. Attempts to simply “refuel” the refrigerator without looking for a leak will only give a temporary effect.
| Symptom | Probable cause | Necessary actions |
|---|---|---|
| The compressor hums, but does not start | Faulty starting relay or compressor wedge | Replacing the relay, checking the windings |
| The refrigerator runs without stopping | Freon leak or loose door fit | Checking the circuit, replacing seal |
| Ice only in the freezer, warm in the refrigerator compartment | Clogged capillary or problem with the fan | Purge the system, check the air channels |
| A whistle or hiss is heard | Refrigerant leak | Finding the leak and soldering |
⚠️ Attention: Freon is a chemical that, when in contact with an open flame (for example, during soldering), can release toxic compounds (phosgene). Sealing and filling work must be carried out by a specialist in a ventilated area.
Failures in the operation of the thermostat and electronics
Thermostat (thermostat) is a sensor that commands the compressor to turn on or off depending on the temperature inside the chamber. If it “lies”, the refrigerator may not turn on at all (if the sensor “thinks” there is enough cold) or work without interruption (if it “thinks” it is warm).
In models with electronic control, control moduleis responsible for all processes. Voltage surges, moisture or manufacturing defects can lead to malfunctions. The electronics may not supply voltage to the compressor or fan, even if the sensors are working properly. Often an error code lights up on the display, which can be deciphered in the instructions.
To check the mechanical thermostat, you can close its contacts directly. If after this procedure the compressor starts working, then the sensor needs to be changed. In electronic models, diagnostics are carried out with a multimeter by checking the resistance of the sensors.
When you need to call a technician
Despite the desire to save money, there are situations when DIY repairs are dangerous or not economically feasible. If you have checked all external factors, defrosted the unit, checked the socket, but the problem has not gone away, most likely, complex intervention is required.
You should absolutely not go inside the refrigerant circulation system without skills and tools. Incorrect soldering or too much freon can completely kill the compressor. It is also better to entrust electronics repair to professionals who have access to original spare parts and circuits.
It is worth thinking about buying new equipment if the refrigerator is more than 10-12 years old and the compressor has failed. The cost of a new motor and work to replace it can be up to 70% of the price of a new device.
Frequently asked questions (FAQ)
Why does the refrigerator freeze but does not turn off?
This may indicate a freon leak, compressor wear, a loose door fit, or a malfunction thermostat. The unit tries to compensate for the lack of cold by constant operation.
Is it possible to use a refrigerator if it has stopped freezing?
It is not recommended to operate a faulty device. Constant wear and tear can lead to compressor burnout. In addition, food in a warm chamber will quickly deteriorate.
How long does it take for the refrigerator to reach temperature after defrosting?
Usually it takes from 2 to 6 hours to stabilize the temperature. If during this time the cold does not appear, it is worth looking for a malfunction.
Why is it warm in the refrigerator compartment, but cold in the freezer?
A common reason is a malfunction of the fan (in the No Frost system) or clogged air channels, which is why cold air does not circulate between the chambers. The capillary tube may also be clogged.