Sudden increase in temperature inside the refrigerator compartment often becomes an unpleasant surprise that is discovered too late, when the food has already begun to deteriorate. Many owners of household appliances notice a problem only when a specific smell appears in the room or a puddle forms on the floor. However, refrigerator malfunctions rarely occur instantly; they are always preceded by certain signals that an attentive user can notice long before the critical moment.
Understanding that how to determine that the refrigerator is not workingallows you to save significant money on restoring damaged products and avoid expensive compressor repairs. Modern technology, be it Indesit, LG or Bosch, has a complex thermoregulation system, and malfunctions in its operation can manifest themselves in different ways. In this article, we will analyze in detail the main symptoms that you need to pay attention to in order to quickly respond to a breakdown.
Timely diagnosis helps to identify the problem at an early stage, when repairs may be limited to replacing the seal or thermostat, and not replacing the whole thing refrigeration unit. Ignoring primary symptoms often leads to failure of more expensive components, such as a motor-compressor or an electronic control module. Let's look at the main indicators that your equipment needs the help of a specialist.
Changes in the sound background and operation of the compressor
The first and most obvious sign of a malfunction is often a change in the usual sound background of the operating device. A working refrigerator emits a smooth, monotonous hum, which periodically subsides during idle time. If you start to hear extraneous noisesuch as grinding, knocking, gurgling or loud humming, this is a direct signal of mechanical problems within the system.
Particular attention should be paid to the operating mode of the compressor. Normally, it turns on to set the temperature and turns off when the goal is reached. If motor-compressor works without interruption, trying to catch up with the cold, or, conversely, does not turn on at all, this indicates serious violations. Frequent switching on and off, known as clocking, also indicates failures in the control or thermal regulation system.
⚠️ Attention: If you hear a sharp pop followed by a smell of burning or burning plastic, immediately unplug the appliance from the power supply. This may indicate an interturn short circuit in the motor windings or overheating of the wiring, which creates a risk of fire.
Diagnostics of sounds requires careful attention to detail. For example, a quiet gurgling sound is often normal for systems No Frostwhere freon circulates, but a loud rumble may indicate oil getting into the circuit or a refrigerant circulation problem. The knocking noise can come from loose housing parts or from a malfunction of the compressor piston itself.
For a better understanding of the characteristic sounds, consider the table corresponding to the noise and the probable cause:
| Sound type | Probable cause | Urgency of repair |
|---|---|---|
| Loud hum/buzzing | Wear of compressor or fan | High |
| Clicks when starting | Faulty start relay | Average |
| Gurgling / overflow | Freon circulation (often normal) | Low |
| Creaking / crackling | Problems with the fan or icing | Medium |
| Case vibration | Incorrect installation or wear of shock absorbers | Low |
Why can the compressor hum louder than usual?
Loud humming is often due to the fact that the compressor is working under increased load. This may be caused by contamination of the condenser (grid at the back), due to which heat transfer deteriorates and the motor is forced to work more intensely. The cause may also be wear of the internal bearings or misalignment of the motor shaft. In rare cases, a loud hum indicates that the refrigerator is too close to a wall or furniture, and the body is resonating with the vibration of the motor.
Temperature anomalies and condition of food
The most reliable indicator of the health of your refrigerator is the condition of the food inside the chambers. If you notice that the milk is souring faster than usual, and the ice cream in the freezer has become soft, it means that it has been broken. This can happen even if the light is on inside and the fan continues to make noise. temperature condition broken. This can happen even if the light is on inside and the fan continues to make noise.
The opposite situation, when food in the refrigerator compartment freezes, is also an alarming signal. Vegetables and fruits that turn into ice blocks indicate that the thermoregulation system is not reading data correctly or cannot control the supply of cold. In models with electronic control this often indicates a failure of temperature sensors.
It is important to distinguish between isolated cases and systematic problems. If you've just loaded a large pot of hot soup, a local rise in temperature is normal. However, if products spoil regularly, despite following the operating instructions, it is necessary to look deeper for the reason. Often the culprits are a freon leak or a clogged capillary tube.
Particular concern should be caused by the appearance of condensation on the internal walls where it should not be. In systems No Frost the walls must remain dry. The appearance of a “snow coat” or drops of water on the back wall of the refrigerator indicates a violation of the defrost cycle or problems with moisture removal.
Visual signs: frost, ice and moisture
A visual inspection of the inside of the refrigerator can tell you no less about its condition than listening to the operation of the motor. One of the clearest symptoms of a malfunction is the formation of an excessive layer of ice or “snow coat” on products and walls. In a working appliance with a system No Frost ice should not form at all.
If you see that the back wall of the refrigerator compartment is covered with a thick layer of frost or, conversely, is completely dry and warm, this is a sign of depressurization of the circuit or failure of the defrost heating element. In older models with a drip system, it is permissible for a small layer of ice to form, which should periodically flow into the drainage hole.
⚠️ Attention: Do not try to chip off the ice with a knife or sharp objects! This can cause damage to the evaporator and immediate loss of refrigerant, making repairs uneconomical. Defrost the chamber naturally.
The presence of water on the floor under the refrigerator is another critical visual marker. A puddle may form due to a clogged drain hole through which condensation normally drains. If the tube is clogged with food crumbs or ice, water begins to overflow over the edge of the pan and flow out.
It is also worth inspecting the rubber seals on the doors. If they are cracked, lost elasticity or do not fit tightly to the body, warm air constantly enters the chamber. This leads to increased frost formation and constant compressor operation. The tightness test can be carried out using a regular sheet of paper.
☑️ Diagnostics of the door seal
Behavior of the defrosting and drainage system
Modern refrigerators require minimal human intervention in the defrosting process, but this does not mean that you can forget about the defrosting system. If your appliance stops defrosting automatically, ice will quickly accumulate inside and block the air passages. As a result, the cold will stop flowing into the chambers, although the compressor will work continuously.
Clogged drainage system is one of the most common causes of water appearing on the floor. Food debris, mold, or ice buildup may block the water from entering the evaporation tray. For cleaning, it is often enough to use a special brush or soft wire, carefully inserting them into the drainage hole.
In models with Full No Frost it is important to monitor the condition of the fan. If it freezes due to a faulty defrost sensor, air circulation stops. This leads to food freezing in one part of the chamber and spoiling due to heat in another. Diagnosis of such a malfunction requires disassembling the rear panel.
Regular, at least once every six months, preventive defrosting helps to avoid many problems. Even if the manufacturer claims that the model does not require defrosting, a complete shutdown for 10-12 hours allows you to get rid of microscopic ice crystals in hard-to-reach places in the system.
Problems with power supply and lighting
Sometimes the problem lies not in the refrigeration circuit, but in the electrical part. If the light does not come on when you open the door, it could be a simply burnt out light bulb. However, if replacing the lamp does not help, it is worth checking the contacts of the socket or the wiring going to the switch.
A more serious symptom is frequent power surges or knocking out plugs in the panel when the refrigerator is turned on. This indicates problems with the starting relay or motor windings. Electrical fault can be dangerous for all wiring in the apartment, so it cannot be ignored.
It is also worth paying attention to the heating of external elements. The side walls or the area between the doors may normally be warm (the heating circuit runs there), but strong heat that is painful to touch indicates an overload of the system. At the same time, if the rear grille (condenser) remains cold while the engine is running, this is a sure sign of a freon leak.
Odors and their effect on products
The appearance of a persistent unpleasant odor inside the chambers, which is not eliminated by washing and airing, may indicate hidden problems. If the smell is reminiscent of rotten fish or rotten meat, but you do not store food with such an aroma, perhaps stagnant water with bacteria has accumulated somewhere in the drainage system or under the casing.
The smell of burning or burning plastic, as already mentioned, is a critical signal. It can come from melted wiring, burnt plastic near the compressor, or an overheating engine. In such cases, use of the device should be stopped immediately.
Sometimes the smell may be associated with the material of the internal shelves or plastic inserts, especially in new models. However, if the device has been in use for a long time and the smell appears suddenly, it is worth looking for its source. Often the culprits are rubber seals that have begun to deteriorate, or mold in hard-to-reach corners.
How to remove the smell from the refrigerator without chemicals?
The most effective way is to use activated carbon. Grind 10-15 tablets into powder, pour into a shallow container and leave inside a closed refrigerator for a day. Ground coffee, soda in an open pack or half of black bread also absorb odors well.
Frequently asked questions (FAQ)
Why does the refrigerator work constantly and does not turn off?
This can happen for several reasons: refrigerant leak (freon), compressor wear, malfunction thermostat or temperature sensor, as well as a violation of the door seal. As a result, the appliance tries to compensate for the lack of cold by constant operation.
Is it normal that the side walls of the refrigerator are hot?
Yes, in most modern models the side walls or the space between the doors act as a condenser. Their heating to 40-60 degrees during the operation of the compressor is the normal mode of heat transfer.
What to do if ice is frozen in the freezer, but it is warm in the refrigerator?
Most likely, the air channels are clogged with ice due to a malfunction of the defrost system (the heating element, timer or sensor burned out). It is necessary to defrost the refrigerator during the day and then call a technician to replace the system elements. No Frost.
Is it possible to use the refrigerator if it hums loudly?
It is not recommended to operate the device with strong extraneous noise. A humming noise may indicate an imminent compressor failure or a loose fan. Continuing operation can lead to complete failure of the equipment.
How often do you need to defrost a No Frost refrigerator?
Technically, the system No Frost does not require manual defrosting. However, manufacturers recommend unplugging the appliance and washing it at least once a year to hygienically treat and remove bacteria that may accumulate in the drainage system.