A sudden increase in temperature in the refrigerator compartment or the appearance of puddles at the foot of the equipment often becomes an unpleasant surprise. Many owners notice the problem only when food begins to spoil or a persistent unpleasant odor appears. However, early diagnostics allows you to identify a malfunction at the initial stage, which often saves products and simplifies repairs.
You can understand that the unit has stopped performing its main function not only by looking at the thermometer. There are a number of indirect signs indicating malfunctions in the cooling system. In this article, we will look at how to carry out a full check yourself, what tools you will need and what to pay attention to first.
If you suspect that your refrigerator is not working correctly, do not immediately panic or call a technician. Often the reason lies in simple things that can be eliminated on your own. However, ignoring obvious symptoms can lead to expensive compressor repairs or complete replacement of the unit.
Initial visual assessment and inspection of products
The easiest way to find out if the refrigerator is freezing is to carefully examine the contents of the chambers. Food is a natural indicator of temperature. If the ice cream has become soft and the milk has quickly turned sour, this is a sure sign that temperature regime the temperature regime is broken.
Pay attention to condensation. The appearance of drops of moisture on the inner walls of the chamber, which were not there before, may indicate insufficient cooling or, conversely, problems with moisture removal. In the freezer, frost should lie in an even layer, if this is not a system No Frost.
Check the tightness of the packaging. If you store food in open containers, they may weather faster or, conversely, become moldy due to increased humidity and temperature. Frozen semi-finished products should not stick together into one lump, which often happens during short-term defrosting and re-freezing.
- 🧊 Products in the freezer are covered with a thick layer of ice or frost, although this has not been observed before.
- 🥛 Dairy products change consistency or taste faster than the specified period. expiration date.
- 💧 On the shelves of the refrigerator compartment there are puddles of water that were not there before.
- 🍖 Meat or fish have lost their elasticity and become flabby to the touch.
It is also important to listen to the operation of the unit. If the compressor runs continuously without turning off, or, on the contrary, turns on extremely rarely, this is a cause for concern. Normal cycle work involves periodically turning the engine on and off.
Using a thermometer for accurate measurements
Subjective sensations are good, but exact numbers are better. To reliably find out whether the refrigerator is freezing, you need to use measuring instruments. An ordinary household thermometer placed in a glass of water will help determine the real temperature in the chamber.
For the freezer, you can use a special digital thermometer with a probe. Place it between the food, but do not touch the walls or bottom, as the temperature there may differ from the general temperature. The optimal temperature in the refrigerator compartment should be from +2 to +5 degrees Celsius.
⚠️ Attention: Do not use mercury thermometers to check the freezer if there is a risk of breaking them. At low temperatures, glass becomes brittle, and mercury vapor is hazardous to health.
Take measurements over several hours. A single measurement may not give the full picture, especially if you have just opened the door or loaded warm food. Give the equipment time to return to operating mode after checking.
Modern models are often equipped with built-in displays, but you should not rely on them alone. Sensors may fail or show incorrect data. Compare the readings on the screen with the data from your external thermometer. If the difference is significant (more than 2-3 degrees), it means that the control system is not working correctly or requires
etra. If the difference is significant (more than 2-3 degrees), it means that the control system is not working correctly or is required calibration electronics.
Analysis of the operation of the compressor and motor
The heart of any refrigerator is the compressor. It is this that circulates the refrigerant and creates cold. You can tell whether the unit is freezing by the nature of the operation of this unit. A working engine emits a smooth, monotonous hum.
If you hear clicks, humming turning into silence, or vice versa, continuous operation without stopping, these are alarming signals. The compressor can run “idle”, creating noise, but not increasing pressure in the system. In this case, no cold will be produced.
Pay attention to the temperature of the compressor itself (usually the black tank in the lower rear part). It should be warm or hot. If the motor is cold but hums, the winding may be jammed or broken. If it is hot to the point where it is impossible to touch it with your hand, this may indicate overheating.
- 🔊 The compressor makes loud knocks or vibrations that radiate into the housing.
- 🔥 The motor-compressor remains cold after an hour of continuous operation.
- 🔄 The engine turns on for a few seconds and immediately turns off with a click.
- 🌡️ The tubes next to the compressor have the same temperature (there should be a difference).
In some cases, the problem may lie in the start relay. This small element is responsible for starting the engine. If the relay is faulty, the compressor will not be able to start, and you will only hear a soft click before silence.
Why is the compressor hot, but there is no cold?
This may indicate that the refrigerant is circulating but not cooling, or there are problems with the heat transfer of the condenser. It is also possible that the capillary tube is clogged, due to which freon does not enter the evaporator.
Checking the defrosting system and evaporator
In refrigerators with a system No Frost the evaporator, hidden behind a plastic panel, is responsible for cooling. If this system is clogged with ice, air will not circulate and the chambers will become warm. You can find out about the problem by looking inside the freezer.
Remove the back wall in the freezer (after unplugging the appliance from the mains). If a massive coat of ice is visible on the evaporator, it means the defrost system is not working. This may be a malfunction of the heating element, timer or defrost sensor.
In drip systems (“crying evaporator”), pay attention to the back wall of the refrigerator compartment. It should be periodically covered with frost, which then melts and flows into the drainage hole. If the wall is dry and warm, there is no cold. If it is covered with a thick layer of ice, the defrost cycle is broken.
| Symptom | Possible cause | Necessary actions |
|---|---|---|
| Thick layer of ice on the evaporator | Malfunction Defrost heating element | Replacing the heating element |
| Water on the floor of the refrigerator | Clogged drainage hole | Cleaning the tube with a brush |
| Frost only at the entrance to camera | Tightness failure | Checking the door seal |
| Continuous operation of the motor | Freon leakage | Tightness diagnostics contour |
Users often forget about the drainage hole. If it is clogged with crumbs or mold, the water does not drain, freezes and blocks the system. Cleaning the drainage is a simple procedure that often returns the refrigerator to normal operation.
Diagnostics of the cooling circuit and freon
Determining a leak refrigerant (freon) is visually difficult, but it is possible by indirect signs. Freon circulates through the tubes, cooling them. If the system is sealed, you should feel the temperature difference in different parts of the circuit
Locate the capacitor (grid on the back or sides). It should be warm or hot when operating. If the grate is cold and the compressor is running, there is likely a gas leak. Without freon, the refrigerator will not freeze.
⚠️ Attention: Freon is odorless and colorless. If you hear hissing or see oily spots on the tubes, this is a sign of depressurization. Refilling the system yourself is dangerous and requires special equipment.
Check the filter drier (copper cylinder near the compressor). Normally it should be warm. If frost or dew appears on it, this may indicate a clogged capillary tube or excess moisture in the system.
☑️ Diagnosis of freon leaks
If you find an oil stain under the refrigerator or on the back wall, this is almost a hundred percent sign that together gas came out with the oil. In this case, you need to call a technician to find the leak and then refill it.
The influence of seals and chamber tightness
Even if all components of the refrigerator are in working order, it may not freeze due to loss of tightness. Warm air from the room constantly gets inside, and the unit does not have time to cool it. The main culprit is the door seal.
Carry out a visual inspection of the rubber around the perimeter of the door. It should be elastic, without cracks, creases or tears. If the rubber is hardened or deformed, there will be no tight seal. Dirt and grease also reduce the effectiveness of the seal.
There is a simple test with a sheet of paper. Clamp the sheet with the refrigerator door so that part of it hangs out. Try to pull out the sheet. If it is removed easily, without resistance, it means that the seal does not fit tightly and requires replacement or adjustment.
- 🚪 The refrigerator door does not close completely the first time.
- ❄️ Ice freezing is observed only on one side of the chamber (where there is poor pressure).
- 🌬️ You can feel a stream of cold air blowing from under the door.
- 🧹 The seal is dirty or has visible damage.
Also check the door hinges. Over time, they can weaken and the door warps. As a result, the upper part may fit normally, but the lower part may move away. Adjusting the hinges often solves the problem without replacing the rubber.
Electronics and thermostat: hidden problems
In modern models, an electronic control board and many sensors are responsible for the temperature. If the thermostat (or its electronic equivalent) is faulty, it may not send a signal to turn on the compressor, even if the chamber is warm.
Check the settings. Sometimes users accidentally reset the modes by switching the refrigerator to the “Vacation” or “Super Freeze” mode (which may not work correctly if it malfunctions). Resetting the settings to factory settings sometimes helps solve a software glitch.
If the refrigerator beeps alarms or the temperature indicator on the display flashes, this is a direct indication of an error. The decoding of error codes for your model brand (for example, LG, Bosch, Indesit) can be found in the instructions or on specialized forums.
In older refrigerators with a mechanical thermostat, the problem may be in the regulator itself. Try gently turning the temperature control knob. If you hear a click and the compressor starts (or stops), then there is contact. If there is no reaction, the thermostat is probably out of order.
What to do if the refrigerator turns on, but does not freeze?
If the motor is running, but there is no cold, most likely the problem is a freon leak or a clogged capillary system. It is also possible for the compressor to fail, which hums but does not pump gas. You need to call a technician to measure the pressure in the system.
Is it possible to operate a refrigerator if it does not freeze well?
Short-term - yes, but this is harmful for the compressor, which wears out. Products in such conditions quickly deteriorate, which can lead to food poisoning. It is better to temporarily move the perishable product to another place and start repairing it.
How often do you need to defrost the refrigerator so that it freezes well?
Refrigerators with the No Frost system do not need to be defrosted, it is enough to wash them 1-2 times a year. Models with a drip system or static type require defrosting as ice forms, but at least once every 6-12 months.
Why does the refrigerator take a long time to reach the temperature after defrosting?
After complete defrosting, the refrigerator takes time (from 2 to 6 hours) to reach operating mode. Do not load the chamber with products immediately; let the empty unit gain cold. If after 8 hours the temperature does not drop, look for a malfunction.